TEAC A-450
Congratulations on your purchase of the TEAC A-450 Cassette deck! You now own
one of the most versatile home-use stereo cassettes ever designed for the discriminat-
ing audiophile.
The TEAC A-450 with the widely acclaimed Dolby Noise Reduction System re-
presents a quantum increase in cassette sound quality, bringing you recording quality,
features and performance to equal or surpass that of high quality open reel recorders.
Until this time the quality of cassette recordings was limited by the inherent noise of
the tape itself. The revolutionary Dolby System, although commercially available to
and in use by almost all major recording studios, was not available to the home tape
The introduction of the Dolby System now brings to the home tape hobbyist all the
benefits of the Dolby System at sharply reduced cost and with a simplicity of
operation not possible with the commercial systems. The New TEAC A-450 enables
you to make recordings from any source with a dramatic gain in signal to noise ratio,
as much as 10 dB! The resultant reduction of noise and tape hiss produces a recording
of breath-taking clarity. The expanded dynamic range gives greater sound impact
without coloration or attenuative filtering.
The Dolby System as incorporated into the TEAC A-450 operates both during
recording and playback. During the recording phase, low amplitude high frequency
signals are expanded by a precise amount, during playback they are compressed by
exactly the same amount by a mirror image circuit. By this process all noise from
both the cassette electronics and from the tape is eliminated or reduced to an
inaudible level. This entire process is accomplished without in any way affecting the
original sound quality, since no attenuative filtering is used. The original signal is
reproduced with true fidelity but without annoying tape hiss or amplifier noise.
We know you will want to begin using your A-450 immediately, however we urge
you to take-a few moments to read this instruction manual. The short time required
to familiarize yourself with the many unique features and proper operating
techniques of this superb cassette deck will result in more professional recording and
many years of uninterrupted enjoyment.
* “DOLBY” “Dolbyized”,and the Double D symbol “ 00 ” are trademarks of Dolby
Laboratories, Inc.
* This product is manufactured under licence from Dolby Laboratories, Inc.
Should the equipment need repair, contact the dealer where it was purchased, the
TEAC Sales Office or Service Center nearest you, or the TEAC Head Office Factory
Service Department. Addresses and telephone numbers of these are listed on the rear
cover of this manual.
1. The Warranty period is described on the enclosed warranty card, read the card for
complete details.
2. For repairs after expiration of the warranty period, a service charge will be
required in addition to the cost of repair parts.
3. If only repair parts are required, please contact the dealer or the nearest authorized
TEAC Service Center.
Note: Although the unit may still be under the warranty period you may be
charged for repairs made necessary due to misuse or damage incurred as a
result of improper operation. Therefore it is important that you thoroughly
read and understand this manual prior to placing the unit into operation.
Function of Controls... . . .... iii tee ee ee eee 1
The Dolby noise reduction system. .... 1.122244 24144244 44 1 24 214240 +
Examples of A-450 — centered connections. ........2.02222022 02022220 5
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Playback Instructions. .. . . «co HH 7
Preliminary recording instructions .. .. .. .. .. «titties 8
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The A-450 provides 3 switch positions for BIAS and EQ
selection. Generally, choose the right position for the tape
used according to the chart to the right.
Positions of a switch might be altered because of a change
in the specifications by a tape manufacture.
What is Chrome (CrO:) Tape?
The magnetic material the chrome tape is coated with is
CrO2 (chromium dioxide.) The tape gives such an outstand-
ing performance as to be very comparable to that of the
low-noise tape used by professionals. The features include:
1. The frequency response characteristic is excellent.
2. It gives wider dynamic range and superb high-frequency
3. It minimizes distortion and improves the S/N ratio.
The overall performance of the chrome tape is thus said to
be remarkably superior to that of an ordinary tape.
Provided with the BIAS and EQ selector switches, your
A-450 can readily be set to appropriate position for either
the ordinary or Chrome tape so that any type of tape may be
played with maximum performance. Note that the magnetic
characteristics differ between ordinary tape and chrome
tape, so use of the chrome tape may not be permitted with a
tape deck not equipped with BIAS and EQ selector switches.
| BIAS. EQ SW Brand Type or model
FC - C-60
| KR - C-60
TRH KR - C-90
СгО? SONY C-60 - CR
S Chromdioxid C-90
o C-60
— A hrom
AGFA-GEVAERT | Chromdioxid 6-90
L E C-60
MEMOREX Chromium dioxide C-90
C-60 - HF
SONY C-90 - HF
SD - C-60
18h D - C-60
FM - C-60
| =
FL - C-60
FL - C-90
C-60 - UD
C-90 - UD
D - C0
TDR SD - 0-90
BASF C-90 - LH
Function of Controls
(1) Cassette Holder Lid
Press the Eject Button (3)lightly to open this lid. Push the
lid from above with your finger to close it.
(2) Cassette Holder
This holds the cassette tape in place when the cassette is
inserted and ejects the cassette when the Eject Button is
pressed. Press the Eject Button (3) fully and this Cassette
Holder will come up to eject the cassette. Simply press it
from above with your finger to close it.
(8 EJECT (Eject Button)
This is a 2-step pushbutton control. Push it halfway and
the Cassette Holder Lid will open. Press it further to the
bottom of its travel and the Cassette Holder will come up
to eject the cassette. When the tape deck is operating in
Playback, Record, Fast Forward or Rewind, first bring it
to a complete stop by depressing the STOP Button prior
to depressing the EJECT Button to eject the cassette.
4 REC (Record Button)
Depress this button for recording. Unless a cassette tape °
that permits recording is installed in the tape deck, this
RECORD Button will not function. Must be depressed
simultaneously with the PLAY Button to record.
(5) << (Rewind Button)
Depress the Button halfway and the tape will rewind as
long as you hold it down. Depress it fully until it locks
and the tape will rewind rapidly onto the left hub of the
cassette. Depress the Stop Button to release the Rewind
Button from the locked position and the tape will stop
rewinding. You can depress pp» (Fast Forward Button)
(7) anytime during rewinding to change moce of opera-
tion directly from Rewind to Fast Forward. However,»
(Play Button) should not be pressed when the tape deck
is in Rewind with «4 «4 (Rewind Button) depressed.
(6) > (Play Button)
Depress this button and tape will run to the right at the
normal (1-7/8 ips) speed. Use it for playback or recording.
(7) > > (Fast Forward Button)
Press this button halfway and the tape will be running to
the right hub at high speed as long as you hold it down
halfway. Depress it fully until it locks and the tape will
keep on running to the right at high speed. You can
depress < < (Rewind Button) (5) for rewinding anytime
during Fast Forward operation. Do not depress » (Play
Button) while the tape deck is in Fast Forward.
(8 STOP (Stop Button)
Press this button to release other control buttons from
their depressed positions. Always depress it before operat-
ing the EJECT Button or the PLAY Button.
(9) PAUSE (Pause Button)
Use this button for quick stop/start control of the tape
during recording or playback. The recording or playback
settings of other controls will not be disturbed. Depress it
until it locks and the tape travel will come to a halt. De-
press it again to unlock it and the recording or playback
Will be resumed at once.
Cassette Tray
This is a cassette storage compartment that can store up to
6 cassette tapes.
AD MIC (Microphone Jacks)
The MIC jack marked L is for the left-channel microphone
and R for the right-channel microphone. Use 600 a ~
10K 2 microphones.
12 PHONES (Headphone Jack)
Provided for connection of stereo headphones. Use 8-ohm
type stereo headphones.
(3 VU Meters
They indicate output level during Playback and input level
during Record operation.
REC (Record Indicator Lamp)
When the Record Button is depressed, this indicator lamp
lights up to indicate that the tape deck is in the Record
15 Peak Level Indicator
This indicator lamp lights up to warn you that the input
level is too high. When this lamp illuminates, it indicates
that the input signal is being recorded more or less dis-
torted, and the input level should be decreased until the
light goes out. May illuminate during playback.
MIC (Microphone Input Volume Control)
This adjusts input levels taken through the microphone or
DIN (IN/OUT) terminals. As finger coupled controls, they
can adjust the input levels for both the left and right
channels simultaneously.
(7 LINE (Line Input Volume Control)
This is the volume control designed to adjust levels of the
line input from a tuner, record player, tape recorder or
player. Also a finger coupled control, it permits separate
or simultaneous adjustment of the input levels for the left
and/or right channels.
OUTPUT (Output Volume Control)
This adjusts playback volume or recording monitor levels.
POWER (Power On-Off Switch)
Set this switch to ON and the tape deck will be turned on.
The pilot lamps of the VU Meters illuminate when this
switch is turned ON. Set the switch to OFF and the deck
will be turned off.
20 TIMER (Timer Selector Switch)
When combined with a commercially available timer, this
cassette deck can automatically start recording or play-
back at a preset time. (For the operating procedures on
recording or playback with a timer, refer to pages 7 and 11
of this manual.
The Power On-Off Switch can be turned on only when
this Timer Selector Switch is set to OUT. Be sure to keep
the Timer Selector Switch set to OUT except when the
deck is to be set for the automatic timer controlled
recording or playback. When the Selector Switch is IN, the
deck will be OFF unless activated by the timer accessory.
(Dolby FM /Dolby Copy IN/OUT Switch)
When this switch is IN, the Dolbyized source material is
copied intact while the output is de-coded for listening.
Normal position is OUT unless the source program is
already encoded. (See page 9 for details).
(Dolby Noise Reduction Selector Switch)
Equipped with the Dolby noise reduction circuit, your A-
450 reduces the tape hiss noise by 10 dB, max.(For details
of this system, see page 4 of this manual.)
IN: This position is used for Dolby recording and play-
back. The indicator lamp lights up when this switch
is in use.
OUT: Bypasses the Dolby circuitry for ordinary recording
and playback. (For further details on Dolby opera-
tion, refer to the pages 7 and 9 of this manual.)
(Equalization/Bias Selector Switches)
These switches select between three positions, Cr0z,
HIGH and NORMAL according to type of the tape used.
Set the BIAS and EQ switch when recording and set the
EQ switch for playback.
Cr02 : Set them to this position when chrome (Cr02)
tape is used.
HIGH: Set them to this position when high-perform-
ance Hi-Fi tape is used.
NORMAL: Set them to this position when an ordinary
tape is used.
24) Tape Counter Reset Button
Press this button to clear the Tape Counter and reset it to
“000”. Clear and reset the Tape Counter at the beginning
of the tape before starting to record or playback and any
desired point on the tape can easily be logged or relocated.
@5 Tape Counter
The amount of tape run is indicated in digits by this
counter. It adds when the tape travels in the forward
(Tape Travel Indicator Lamp)
This indicator lamp illuminates to indicate the tape is
Cover the top side of the tape deck with this dust cover
during and after use. It protects the cassette tray and top
panel of the deck from outside dust.
@) GND (Grounding Terminal)
For grounding, connect a vinyl-coated or enameled wire
to this terminal, attach a piece of copper to the other end
of the grounding wire and then bury the copper deeply
When a record player and/or amplifier are connected to
this set, connect their grounding wires to this GND
terminal and all the component units of the system will
be grounded. (Note: Grounding is not normally needed
unless noise or hum develops.)
29 OUTPUT (Output Terminals)
Two pairs (1 and 2) of output terminals are provided, one
pair for the playback output and the other pair for the
monitor output, thus enabling the tape deck to supply
output to two 2-channel systems simultaneously.
Connect L (white) of one of these terminals to the L input
terminal (TAPE DECK. PLAY or AUX) of a stereo ampli-
fier and R( red) to the amplifier’s R input terminal.
Using a DIN connector cord (such as WR-134 available as
an option), connect this input/output jack to a similar
DIN connector terminal of a stereo amplifier and you can
record from or reproduce through the amplifier with a
single cable connection.
CAUTION: Do not connect this IN/OUT Jack to a similar
DIN jack on another tape recorder or tape
deck. Do not have both a DIN cord and pin-
jack cords simultaneously connected between
the deck and an amplifier.
LINE IN (Line Input Terminals)
Use these input terminals for connections when recording
from another amplifier or tape deck.
(Dolby FM/Dolby Copy Calibration Level
Use these calibration controls to set your A-450 Dolby
circuitry for reception of Dolby FM broadcasts. While
receiving the standard Dolby-level calibration signal of the
Dolby FM broadcasts, adjust the controls with your
finger or a common (—) screw-driver until the pointer of
the VU Meter (3 points to the Dolby mark ( 00 ).
Once adjusted properly, it need not be readjusted unless
the antenna is moved, the tuner is replaced, or the meter
fails to indicate the Dolby mark during subsequent test
tone transmissions.
@3 Voltage Selector
Set this operating voltage selector to 100V, 117V, 220V
or 240V position according to the rated voltage of the
AC power available in your area.
(See page 12)
AC Outlet (150W Max)
AC power needed to operate an amplifier, tape deck,
tuner or record player can be taken from this AC power
outlet. Output capacity of this power outlet is 150W,
maximum. |
65 FUSE 2A (Fuse Holder)
86 AC Power Cord
Connect this power cord to an AC wall outlet.
The Dolby noise
reduction system
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Tape hiss and transistor noise from the cassette deck itself
are problems inherent in any cassette tape recording. The
magnetic coating of a cassette tape is so thin that its
magnetic saturation point is very low. This makes it difficult
to improve the S/N ratio through high-level recordings as
often practiced with an open-reel tape.
Numerous ways have been contrived and tested over the
years to reduce tape hiss and transistor noises. Nevertheless,
most of the noise reduction systems marketed today employ
a high-frequency filter for reducing these noises. Use of a
filter results in a somewhat changed tone quality, especially
in the treble range, the frequency range considered most
important in music recording and playback.
The newly perfected Dolby system is an epoch-making noise
reduction system in that the noise level itself is lowered to
improve the S/N ratio. The best of the noise reduction
systems available today, it enables you to make recording and
playback featuring extra-low noise and wider dynamic range.
Your A-450 is a Dolby-system cassette tape deck and there-
fore assures you of the revolutionarily noise-free recording
and playback which only the Dolby system can provide.
Principle and Outline of the Dolby System
Dolby System comes in two types, A Type and B Type. The
A Type is designed for studio use and comprises a complex
and enormous circuitry structure which divides the record/
playback frequency band (20Hz — 20 kHz) into four bands.
The B Type, designed for popular use, features simpler
circuitry and is easy to handle.
The principle of the Dolby System can be described as
follows: |
When the input level is lower than a certain reference level in
Record, the recording level is raised higher than the input
level to “compress” the input signal, thereby enlarging the
difference between the input level and the noise level in-
herent in the tape and amplifier. When playing back this
recording, the reproduction level is lowered to the original
input level or “expanded.” Through this unique manipla-
tion, the tape noise is reduced below normal levels to in-
Effects of the Dolby System
In the frequency range of 1 kHz. or higher where the tape
hiss and transistor noises are more conspicuous, the B Type
Dolby system incorporated in the A-450 can reduce such
noises by 5 dB at 1 kHz and 10 dB at 10 kHz (in terms of
S/N ratio) by compressing and expanding the signals of |
kHz or higher. (Refer to the diagram above.)
Thanks to the Dolby system incorporated, your A-450 gives
dynamic, clear-tone recording and playback practically free
of the tape hiss and transistor noises formerly considered
unavoidable in a cassette system.
Inter-deck Compatibility of Dolby-encoded Tapes
Cassette tapes recorded by a Dolby-system recorder (Dolby-
encoded cassette tapes) give the best results when reproduc-
ed by a similar Dolby-system recorder or player. Needless to
say, no Dolby effects will be demonstrated when such tapes
are played back by an ordinary cassette tape deck, but the
treble range may be heard somewhat emphasized when very
soft signals are reproduced. This slight emphasis of the treble
range is almost unnoticeable unless compared with the
original source program or with the sound reproduction
made through the Dolby circuit.
For playback of Dolby-encoded tapes with an ordinary tape
deck, it is advisable to somewhat de-emphasize the treble
The Dolby System mentioned in this manual refers to B-
Type Dolby System unless otherwise indicated.
Examples of A-450-centered connections
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General operating suggestions
Inserting the cassette
Depress the Eject Button (8) fully and both the Cassette
Holder Lid (1) and the Cassette Holder (2) will open. Place
a cassette tape on the Cassette Holder so that the open end
(where tape is partly exposed) of the cassette will face toward
you. Press the cassette downward with your fingers until it
locks in place. This completes loading the tape deck with a
cassette tape, making the tape deck ready to start in either
playback or recording.
Whether or not the Cassette Holder Lid is closed does not
matter as far as the recording or playback operation is
concerned. To close the Cassette Holder Lid, simply press it
from above with your finger. Keep it closed for the purpose
of keeping dust out of the compartment.
Press the Power On-Off Switch to prepare your A-450.
This tape deck can not be turned on unless the Timer Selector
Switch (20) is set to OUT except when the deck is prepared
for Timer-controlled recording or playback.
A cassette has two sides, Side 1 (or A) and Side 2 (or B).
The side you wish to record or play back should be up
when that cassette is installed in the tape deck.
. When one side of a cassette has completely been recorded
or played back and you want to record or play back the
other side, take out the cassette from the tape deck, turn
it over and re-insert it in the tape deck.
3. When the tape winding is very loose, the hub that has no
tape slack should be turned to restore proper tension.
To Start Playback
Depress » (Play Button) (6) and the tape will be wound up
onto the right hub at the regular speed, thus starting play-
Equipped with the built-in end stop mechanism, the A-450
automatically releases the control button from the depressed
position to change, the functional mode to STOP when the
tape end is reached.
The power supply circuit is automatically turned off with the
Timer Selector Switch (20) set to IN. Since the AC Outlet
64 is part of this power supply circuit, power taken from
this AC Outlet for an external audio component (such as a
tuner connected to it) is also cut off at the same time.
Fast Forward and Rewind
The Fast Forward and Rewind functions are conveniently
used when you want to skip over unnecessary portions of the
tape or play back the same program several times.
Lightly press » » Button (7) (or 4 « Button (5) ) halfway
and the tape will be wound onto the right hub (or left hub)
at faster speed. Press > > (or << ) Button fully and it will
lock in depressed position. Lock the Button in the depressed
position when you want the tape completely wound onto
the right (or left) hub.
Mode of operation can be changed directly from Fast
Forward to Rewind or vice versa. To change mode of
operation from Fast Forward or Rewind to Play, however,
the Stop Button should be pressed before pressing » (Play
Depress the PAUSE Button (9) during recording or playback
and it will lock in the depressed position to temporarily halt
the travel of the tape.
Depress it again to unlock it and the recording or playback
will be resumed immediately. The PAUSE function is useful
in that one quick touch on the PAUSE Button immediately
stops or resumes recording or playback. You do not need to
release or reset the Record and/or Play buttons each time
the recording or playback is stopped or started.
Headphone Listening
Connect an 8-ohm type stereo headphone (such as aTEAC
HP-101) to the PHONES Jack (2 and you can enjoy
private listening through the headphone.
Dolby Terminology
* Dolby-encode: The term refers to processing to obtain
the Dolby-level recording characteristic.
[t is generally synonymous with output
of, or processing by, a Dolby processor
when recording.
The term refers to processing to convert
or “decode” the Dolby-encoded signal
to its original form.
* Dolby-decode:
Playback instructions
|. For proper connections, refer to “EXAMPLES OF A-450-
2. Load the A-450with a prerecorded cassette tape and set
the switches and controls to the positions indicated
POWER (Power On-Off Switch) e... ON
The VU Meters will illuminate.
TIMER (Timer Selector Switch) 20 ........ OUT
When the Time Selector Switch (20) is set to IN, the
deck can not be turned on.
DOLBY FM/COPY (Dolby FM/Copy Selector
Switch) 21)
DOLBY NR (Dolby NR Selector Switch) 22)
EQ (Equalization Selector Switch) Q3) .......
Set to proper position according to type of the play-
back tape as indicated below:
Cros: For playback of chrome tape
HIGH: For playback of high-performance
Hi-Fi tape
NORMAL: For playback of ordinary tape.
BIAS (Bias Selector Switch) 03)... ..........
No effect on playback
MIC (Microphone Input Volume Control) 16)... -
No effect on playback, but set to Minimum.
LINE (Line Input Volume Control) 47 .......
No effect on playback
OUTPUT (Output Volume Control) 49) .......
Both L and R set to minimum initially.
3. Turn on your stereo amplifier connected to the A-450 and
set the amplifier’s controls and switches to proper play-
back positions.
4. Depress p (Play Button) (6)- Tape then runs forward at
the regular speed and the TAPE RUN (Tape Travel Indi-
cator Lamp) @6) illuminates.
. While watching the volume level indicated by the VU
Meter, increase the volume level gradually with the OUT-
PUT controls to obtain the optimum playback level.
(Max. 0 VU)
6. Adjust listening volume and the tone quality using the
stereo amplifier controls.
For proper operation and connections of the stereo
amplifier, please read the operating instructions manual
of the amplifier.
1. For proper connections, refer to “EXAMPLES OF A-450
CENTERED CONNECTIONS” shown on the preceding
. The other operating procedures are the same as those
NOTE: Never use both a DIN cord and pin-jack connections
For playback of commercially available cassette music tapes
recorded by the Dolby system or cassette tapes recorded by
your A-450, set the DOLBY NR (Dolby NR Selector Switch)
@2 to IN. The other operating procedures are the same as
TERMINALS” instructed earlier. Keep the DOLBY FM/
COPY switch in the OUT position.
Combined with a timer, your A-450can automatically start
playback at a preset time to awaken you to your favorite
music, for example. The required settings are as follows:
1. Playback the tape and set volume in advance to your
ordinary listening level. Rewind the tape.
2. Depress the PAUSE Button (9). Depress the PLAY » But-
ton (6).
3. Following the procedures instructed in the operating
instructions manual of the timer, set the desired time on
the timer.
4. Now, set the TIMER (Timer Selector Switch) (0) of the
A-450 to IN.
5. The other operating procedures are as instructed previous-
6. The timer is automatically switched on at the preset time
to start the A-450.
The tape forward mechanism becomes activated with the
A-450 turned on and, in a few seconds. the PAUSE Button
is automatically released from the locked position to
start playback.
Preliminary recording instructions
To Set Recording Level
The VU Meter indicates output level in Playback and
input level in Record. For the recording level adjustment,
first depress the PAUSE Button and then, depressing the
REC (Record Button), press » (Play Button) simultaneously,
The VU Meter is now ready to indicate the input level, that
is, the recording level. Set as above, your A-450 permits you
to monitor the input signals through the headphone.
While watching the VU Meter, adjust the recording level with
MIC (Microphone Input Volume Control) (16 for the micro-
phone or DIN input or with LINE (Line Input Volume
Control) (D for other inputs. Set the recording level to a
level where the VU Meter's pointer will not deflect too far to
the maximum even with the momentary maximum input.
Recording that gives the best S/N ratio can be obtained when
the recording level is set to such a level that the VU Meter's
pointer will be deflecting as fully as possible within the range
marked by “0” for Dolby recording or ordinary recording.
[f the recording level is so high that the VU Meter's pointer
deflects too far to the maximum, the recording may
have distortion. Such a distorted recording is unpleasant
to hear when reproduced.
How to Use the Peak Level Indicator
Compared with the peak level meter of a professional model,
the transient characteristics of VU Meters used in popular-use
tape deck, are generally not so good. (The transient characte-
ristic referred to herein represents how faithfully the VU
meter can react to changes in the input signals.)
When the level variation of an input signal is gradual, the VU
meter can deflect quite faithfully in proportion to the input
signal strength. When the variation is drastic, however, the
meter fails to follow in time the changing levels of the input
signal, thus giving the level indication that is often lower by
a few dB than the actual input level. For example, the meter
may indicate 0 dB for an actual input signal of +6 dB.
The Peak Level Indicator has been provided to compensate
for such a short-coming. It is useful especially for cassette
tape recording in that the cassette tape has a narrower
dynamic range than an open-reel tape and is, therefore, sub-
ject to more sound distortion when recorded with an extra
high input level setting. (saturation).
The Peak Level Indicator of the A-450 has been preset to
indicate at the level from where recording generally begins
to distort. It-may also illuminate during playback.
When the input signal level is too high, this Peak Level
[Indicator lamp illuminates to indicate that the input signal is
being recorded with distortion. When it illuminates, lower
the input level until the lamp light stays out. With the input
level adjusted properly, you will have the input signal record-
ed clearly and without distortion.
When you record, therefore, adjust the recording level so that
the Peak Level Indicator lamp will not illuminate. With the
recording level properly set as above, you can have distortion-
free recording that gives a better S/N ratio.
To Monitor Recording
Connect an 8-ohm type stereo headphone to PHONES (Head-
phone Jack) when the tape deck is in Record position, and
you can monitor through the headphone the input signals
being recorded. The headphone monitoring combined with
the check by the VU Meter provides an excellent recording
level check.
Effect of PAUSE Button
Use the PAUSE Button for better cueing when recording.
First, install a cassette tape properly and then depress the
PAUSE Button (9). Now. depressing the REC (Record
Button), press » (Play Button). This makes your A-450 set
ready for recording. Adjust recording level properly ana wait
for a chance to start recording.
Set as above, your A-450 starts recording immediately when
the PAUSE Button is pressed again. With the PAUSE Button
pressed again as mentioned above, the tape starts moving
forward to record. To temporarily halt the travel of the tape
during recording, press the PAUSE Button once again. not
the Stop Button.
Tape Counter
Before beginning to record or playback from the beginning
of the tape, reset the Counter to “000” by pressing
the Reset Button. The counter adds when the tape travels
in the forward direction. Log the numbers indicated on
the Counter for each particular recorded selection, so that
those selections may be easily relocated later.
How to Use BIAS and EQ
(Bias and Equalization Selector Switches)
When in Record, the BIAS and EQ. selector switch select the
appropriate recording bias and Equalization according to
the type of tape used. The EQ Switch is set to the proper
position in Playback according to type of the tape used, as
indicated below:
CTO ==> For use with chrome tape (Cr02)
HIGH ... For use with high-performance Hi-Fi tape
NORMAL. . For use with ordinary tape
Recording instructions
Recording, Using LINE IN and OUTPUT Terminals
1. Load the A-450 with a cassette tape and set the switches
and controls as indicated below:
POWER (Power On-Off Switch) 49 ..... ON
The VU Meters illuminate with the POWER turned
to ON.
Note that the A-450 can not be turned on it the
Timer Selector Switch @0) is set to IN.
TIMER (Timer Selector Switch) @0 ..... OUT
(For the Timer Recording where this switch should
be set to IN, refer to the page 11 of this manual.)
DOLBY FM/COPY (Dolby FM/Copy Selector Switch)
EQ (Equalization Selector Switch)
BIAS (Bias Selector Switch)
Set as indicated below according to type of the
tape used:
СтО2: For recording on chrome tape
HIGH: For recording on high-performance
Hi-Fi tape
NORMAL: For recording on ordinary tape.
MIC (Microphone Input Level Control) Ca
While watching the input level indicated by the VU
Meter, adjust the microphone input with this input
volume control. The A-450 permits MIC/LINE mix-
ing for recording.
LINE (Line Input Level Control) 17) ......
While watching the input level on the VU Meter,
adjust the input level from a tuner, record player or
tape player by means of this input volume control.
The A-450 permits MIC/LINE mixing for recording.
OUTPUT (Output Volume Control) 49 ......
Adjust monitoring volume to your desired listening
level, using this volume control.
. Turn on your stereo amplifier connected to the A-450 and
set the amplifier’s switches and controls for Record
3. Depress the PAUSE Button (9) of the A-450 until it locks.
Next, depressing the REC (Record Button), press the
(Play Button) (6) until both control buttons lock. Then,
adjust the recording level properly, referring to “To Set
Recording Level” instructed in the preceding page.
4. Press the PAUSE Button again to release it from the
locked position and recording will start right away. The
TAPE RUN (Tape Travel Indicator) lamp then illuminates
to indicate the tape is running. Use the PAUSE Button to
temporarily halt the travel of the tape during recording or
playback. Quick stop/start control of the tape is easily
accomplished with the PAUSE Button.
For proper operations and connections of the stereo
amplifier, please read the operating instructions manual
of the amplifier.
Recording, Using IN/OUT (DIN Type REC/PB
Connector) Jack
1. For the proper connection, refer to the page 5 of this
2. Adjust the recording level with the MIC (Microphone
Input Volume Control)
3. The other operating procedures are same as those given in
“Recording, Using LINE IN and OUTPUT Terminals.”
When the IN/OUT (DIN Type REC/PB Connector)
Jack is used, do not connect pin-jack cables to the
LINE IN or OUTPUT Terminal.
Recording with the Dolby System
I. Set the DOLBY NR (Dolby NR Selector Switch) 22 to
2. Adjust the recording level so that the VU Meters’ pointers
will be deflecting as fully as possible up to “0” VU.
The other operating procedures are same as those given
in “Recording, Using LINE IN and OUTPUT Terminals.”
To Record a Dolby FM Broadcast
|.Set both the DOLBY FM/COPY (Dolby FM/Copy
Selector Switch) 21) and DOLBY NR (Dolby NR Selector
Switch) 22 to IN.
. Depress the PAUSE Button (9) until it locks. Next,
depressing the REC (Record Button), press the » (Play
Button) (§)until both control buttons lock. The A-450is
now record-ready.
. While receiving the standard Dolby-level signal at the
beginning of the Dolby FM broadcast, adjust the DOLBY
FM/COPY CAL (Dolby FM/Dolby Copy Calibration Level
Adjustment) 32 with your finger or a common (—)
screwdriver until the VU Meters’ pointers point to the
Dolby mark ( 00 ). Once properly adjusted, they need
not be readjusted for Dolby calibration unless the antenna
position is moved, the tuner is replaced with another, or
the meters’ needles fail to indicate the Dolby mark ( 00 )
during subsequent broadcasts of the Dolby test tone.
When the DOLBY FM/COPY switch @1) is set to IN, the
MIC (Microphone Input Volume Control) and the
LINE (Line Input Volume Control) (7) have no effect on
the volume adjustment.
4. Now that the recording level adjustment has been comple -
ted, wait for the program to begin and start recording.
S.Press the PAUSE Button again to release it from the
locked position and recording will start immediately.
6.Set the DOLBY NR (Dolby NR Selector Switch) to IN
Lor monitoring the Dolby-decoded signal and to OUT for
monitoring the Dolby-encoded signal. Never move the
DOLBY FM/COPY switch 21) during recording.
To Copy or Duplicate Dolby-encoded Cassettes
(Transcribing Dolby to Dolby without re-encoding)
1. Set both the DOLBY FM/COPY (Dolby EM /Copy Selector
Switch) 2D and the DOLBY NR (Dolby NR Selector
Switch) 22 to IN.
2. Depress the PAUSE Button (9) until it locks. Next,
depressing the REC (Record Button) (4), press the »
(Play Button) (6) to set the A- 450 to the Record mode.
. Using the other cassette deck, play back the standard
Dolby-level tape (MTT-150 available as an option), and
adjust the output volume of the playback deck until the
pointers of the A-450’s VU Meters point to the Dolby
Mark ( pg ).
4. FZy back the original Dolby-encoded tape with the other
cassette deck. When the DOLBY FM/COPY @D) is
set to IN, the MIC (Microphone Input Volume Control)
(19 and the LINE (Line Input Volume Control) (7
have no effect on the volume adjustment.
5 . Depress the PAUSE Button (9) again to start recording.
6 - Set the DOLBY NR (Dolby NR Selector Switch) to IN to
monitor the Dolby-decoded signal and to OUT to monitor
the Dolby-encoded signal.
When the cassette playback system has no output volume
control, the required Dolby-level calibration must be per-
formed by means of the DOLBY FM/COPY CAL Calibration
adjustment controls.
To copy Dolby-encorded open reel tape onto
cassette with Dolby encoding
Open-reel Dolbyized tapes are sometimes recorded at a
higher signal level than cassettes. If a direct copy is attempt-
ed, the cassette tape is liable to sound distorted because of
highlevel saturation. Therefore, the open reel tape must be
decoded through a separate Dolby Noise Reduction Unit and
then re-encoded on the A-450 to preserve the desired quality.
There is no appreciable loss of sound by this method, and
the Dolby process maintains the hiss—and noise-free record-
ings very affectively.
1. Connect the Dolby Noise Reduction Unit’s outputs to the
A-450 LINE IN terminals, either directly or through the
stereo amplifier.
O6 mo №
8 1119 [o 1109) |] Ma,
Note:Prepare the open reel tape deck and separate Dolby
Noise Reduction unit as outlined in their Operating
Instructions. Place the Dolby NR switch IN with the
Dolby unit in Play mode and perform Playback Calibra-
tion as required.
2. On the A-450, set the DOLBY FM/COPY (Dolby FM/Copy
selector switch) (21) OUT and the DOLBY NR (Dolby
NR selector switch) (22) IN. Insert a blank sassette.
3. Depress the PAUSE button (9) until it locks. Next, while
depressing the REC (record) Button (4), press the
(Play Button) (6), thus placing the A-450 in the Record/
Pause mode.
4, While the A-450 is in the Record/Pause mode, playback
the loudest portions of the open reel tape. On the A-450,
adjust the LINE input level controls so that the VU meters
do not exceed 0 VU and the peak level indicator does not
illuminate excessively. Obtain the highest recording level
possible without exceeding these limitations. Rewind the
5. Release the PAUSE button on the A-450 and begin play-
back on the open reel deck.
6. While copying, make ali listening level adjustments with
the stereo amplifier’s output controls and the A-450
OUTPUT comtrols. Do not change any level on the A-450
INPUT or the open-reel deck output.
10 —
Preventive maintenance
Recording from a tuner, using a timer control
( TIMER selector switch)
Using a timer you can record AM or FM broadcasts auto-
matically at any desired time. Set the A-450 and tuner as
1. Refer to the connections on the page 5. Also, connect the
Tuner to the AC OUTLET on the A-450 For the present,
leave the TIMER switch OUT.
.Perform steps 1 and 2 of the section “Recording, using
LINE IN, OUTPUT”. When recording using the timer, if
you want to monitor from the speaker simultaneously,
set the power switch ON on the amplifier. Otherwise leave
it OFF (unless you are using an integrated Receiver/
. Depress PAUSE button (9) of the A-450 to lock. With the
REC button (4) depressed, press the PLAY button until it
is locked.
. Turn the power ON on the tuner and select the stations.
Set the recording level. See the section “Recording, Using
. According to the instruction manual of the timer, set the
timer control to the desired time. In this condition, the
power on the A-450 and the tuner will be OFF. Connect
the timer control to a wall socket, not the A-450.
. Set the TIMER selector switch 20) on the A-450 to IN.
. At the desired time, the timer control turns to ON and
electricity will be supplied to the A-450 and the tuner.
When power is on, a delay circuit begins. After a few
seconds, the PAUSE button will be unlocked and start the
deck recording.
. When the recording is completed at the end of the tape,
the end-stop mechanism works and every button will be
unlocked automatically. The A-450 AC OUTLET and
tuner turns OFF.
Recording With Microphones
1.Set the POWER (Power On-Off Switch) of the A-450
to ON.
. Connect microphones, each a 6002—10K 2 type, to the
MIC terminals (1)
. Depress the PAUSE Button (9) until it locks. Next, depres-
sing the REC (Record Button) (4), press the » (Play
Button) until both buttons lock. Adjust the recording
level properly, referring to the instructions given in “To
Set Recording Level,” Page 8.
. Press the PAUSE Button (9) again to unlock it and record-
ing will begin. The TAPE RUN (Tape Travel Indicator)
lamp then illuminates to indicate the tape is running.
Your A450 permits MIC/LINE mixing for recording.
About Cleaning:
When the heads are dirty with dust, the tape deck not only
fails to faithfully reproduce highs but there are audible skips
of sound. When the pinch roller and/or capstan are dirty, the
tape may become entangled with them as it travels. So, clean
them periodically and especially before marking any impor-
tant recordings. The head, pinch roller and capstan can be
cleaned comparatively easily if you clean them while the
Cassette Holder is pushed in and the (Play Button) is dep-
ressed which extends the heads for easy access. TEAC offers
the TZ—261, a head and rubber cleaner set for this cleaning
NOTE: Guarantee does not
cover tape damage
due to improper
cleaning of capstan
shaft or pinch
Demagnetization of the Head:
After many hours of use, the head and metal parts in the
mechanism may become slightly magnetized. As a result, the
performance in highs deteriorates or noisé increases. In the
worst case, your valuable music tapes may become intoler-
ably deteriorated in the treble range and often mixed with
noises. Using the TEAc E-1 head eraser (available as an
option), demagnetize the head and capstan shaft at least
once every 50 hours of use.
1. Turn off the tape deck.
2. Push the Cassette Holder in until it locks in place.
3. Depress the » (Play Button) until it locks, and the head
will be extruded.
. Turn on the head eraser.
. Bring the head eraser closer to the tip of the head from
above and move the eraser slowly from the front of the
head to the rear 4 or 5 times. Then, slowly move the
eraser away from the head.
. Demagnetize the ca stan shaft likewise.
. When the demagnetization treatment is finished, turn off
the eraser only after it is 30cm (12””) or more away from
the head.
u >
Changing the power
line setting
NOTE: The voltage and frequency of the A-450 must match
the power line.
Voltage conversion
NOTE: Disconnect power cable first.
Remove the two screws holding the protective plate over
the Voltage Selector Plug.
Pull out the voltage selector plug.
Re-install the plug so that the proper voltage is indicated
in the cut-out window of the plug.
Replace the protective plate,
Frequency conversion — switch and belt
da O'S}
With power removed from the unit, place the A-450 top
down on a flat surface.
. Remove the 6 screws holding the bottom cover and slide
off the cover.
. Lift the wide belt off the small pulley wheel.
. Remove the two small X-point screws from the small,
aluminum drive pulley. Invert the pulley and replace the
screws. If they do not both screw in, rotate the pulley
. Re-install the belt on the pulley, taking care not to
damage or stretch the belt.
Rotate the large pulley wheel several turns to verify that
the belt is properly in place.
. Below the Printed Circuit Board between the fuse on the
top of the board and the flywheel is a two position switch,
Slide this switch toward the center of the deck for 50 Hz
or to the outside for 60 Hz.
Replace the bottom cover.
Features of High Density Ferrite Heads
, High magnetic permeability and head sensitivity.
. Better head-gap linearity and excellent L—R channel
phase characteristic.
Excellent frequency response characteristic.
. Less bias current needed as compared with a conven-
tional head and therefore less residual noise in a no-signal
The anti-abrasiveness has been improved immensely to
provide much longer service life.
More difficult to magnetize.
Optional accessories
Type of Tape
Tape Speed
Wow and Flutter
Frequency Response
Signal to Noise Ratio
Fast Winding Time
Power Requirements:
Electret condenser
headphone (8 ohms)
Head and rubber
IZ =
Optional accessories
Two: erase, record-playback (4 track
2-channel stereo)
Cassette tape C-60 and C-90
(Philips type)
1-7/8 ips
Hysteresis synchronous outer-rotor
30 — 10,000 Hz (regular tape)
30 — 13,000 Hz (Hi-Fi tape)
30 — 16,000 Hz (chromium dioxide
50 dB
58 dB (with Dolby process)
Approximately 95 seconds for C-60
Microphone: 0.25 mV/-72 dB
(600—10,000 ohms)
Line: 0.1 V, 100,000 ohms or
Line: 0.3 V for load imped-
ance of 10,000 ohms
or more
Headphones: 8 ohms
100/117/220/240 V AC,
50/60 Hz, 18W
6-15/16”(H) x 17-1/2”(W) x 10-5/8”
[176(H) x 445(W) x 270(D) mm]
21 1bs. (9.5 kg) net
Input-output connection cord
Silicone cloth
Cleaning stick
Plastic cover
Dolby level
calibration tape
DIN connector
Stereo Cassete Deck A-450
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