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AMPLIFIER
WNER’S —
MANUAL NO. 017779 | | MANUAL
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ado: Your selection of a Fender amplifier will be rewarded with
years of quality music in a wide range of controlled sounds.
This manual is designed to familiarize you with the equip-
300 WA TT BAS S ment and acquaint you with its many fine features. Read it
AMPLIFIER | carefully so that you will benefit from all of the features as
| soon as you start using the amplifier.
Copyright © 1980 CBS Musical instruments
A Division of CBS Inc. |
WARNING
TO REDUCE THE RISK OF FIRE
OR SHOCK HAZARD, DO NOT
| | EXPOSE THIS APPLIANCE TO
В | RAIN OR MOISTURE PN 016637
PARAMETRIC
Eo EQUALIZER
VOLUME LOW MID MID , EFFECTS UALIZER CONTROLS (3)
CONTROLS CONTROL CONTROL CONTROL ON/OFF SWITCH COMPRESSOR POWER ON/OFF
LEVEL CONTROL SWITCH
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VOLUME TONE EFFECTS : EQUALIZATION 3 COMPRESSOR POWER
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CONTRO CONTROL EFFECTS EQUALIZATION COMPRESSOR .
INPUT JACKS t INDICATOR INDICATOR ON/OFF SWITCH INDICATOR
FRONT PANEL
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
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FRONT PANEL FUNCTIONS
VOLUME CONTROLS
— This is actually two concentric controls. The
center or smaller diameter knob is the
conventional volume control forthe amplifier, and -
is functional in all modes of operation.
The outer or larger diameter knob is a volume
control for the parametric equalizer section of the
amplifier. With this control set at its maximum
(10), the gain of the equalizer is approximately
unity with each of the equalizer controls in their
“flat” or center position. This control is used to
balance the level
parametric equalizer is turned ON.
>
of the sound when the
TONE CONTROLS
Bass Control —A shelving type of tone control to
regulate the desired level of bass response.
Low Mid Control — A peaking type oftone control
operating in the low-mid frequency range (100 Hz
to 300 Hz).
Mid Control — A peaking type of tone control
operating in the mid frequency range (300 Hz to
600 Hz).
Treble Control — A shelving type of tone control
which is effective for high frequencies (above 1
KHz). | |
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EFFECTS CONTROL
This control regulates the relative amplitude of
the effects return signal supplied to the effects
input jack on the rear panel. In the full counter-
clockwise position only the normal bass signal is
fed to the power amplifier. In the full clockwise
- position only the effects return signal is fed to the
power amplifier. At other positions of the control a
~ mix of normal and effects return signal is fed to the
- amplifier. a
EFFECTS INDICATOR
‘This green LED indicates when the effects control
Is active. If no foot switch is plugged in, the control
- is always active. With the foot switch plugged in,
the effects return can be turned ON or OFF. The
~ LED indicates when the circuit is ON.
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EQUALIZER ON/OFF SWITCH
This toggle switch connects the parametric
equalizer into the circuit in the ON position. The
equalizer LED indicator is also turned on and the
equalizer volume control is active. In the OFF
position the signal bypasses the equalizer circuit.
However, even with the equalizer switch OFF the
signal out of the equalizer is available at the line
output on the rear panel if so selected by the line
output selector switch. With the switch ON the
equalizer can be turned OFF or ON with the
footswitch.
PARAMETRIC EQUALIZER
There are three sections which function
independently. The operation of each section |5
the same except for the frequencies of the
frequency select switch.
/
The center knob controls the amount of cut or
boost that is provided at the frequency selected by
the outer knob. The outer knob provides five
discrete frequency selections.
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COMPRESSOR ON/OFF SWITCH
This toggle switch enables operation of the built-
incompressor. Thecompressor will automatically
reduce the amplifier voltage gain for signal levels
in excess of a level defined by the compressor
level control. With the switch in the OFF position
the compressor will not operate. With the switch
in the ON position the compressor will operate as
a function of the level controland the input signal.
COMPRESSOR LEVEL CONTROL
"This control adjusts the threshold level at which
the compressor operation will start. The full
clockwise position provides the minimum level
(least output). The start of compressor operation
_ is indicated by the red LED indicator.
COMPRESSOR INDICATOR
This red LED indicates that compression (gain
reduction) is taking place.
POWER
This switch turns on AC power to the unit. Itis also
a magnetic circuit breaker that will automatically
turn OFF in the event of a major amplifier
overload. The circuit breaker. is reset by simply
turning the switch on again.
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| | POWER LINE OUTPUT FREQUENCY
EFFECTS PRE-AMP AMPLIFIER SELECT SWITCH CONTROL
OUTPUT OUTPUT 7 / : ADJUSTMENT
PRE AMP / PWR. AMP
| SPEAKER SPEAKER OUTPUT POST CONPRESSOR m
JACK à TOTAL LOAD 4u POSYEQUALIZER rm DON
— 300 WATTS UNE OUT
SELECT
PRE TONE
POST TONE
120 VOLTS
50/60 Hr SPEAKER
600 WATTS FUSE
FEAKER| | D
CBS MUSICAL INSTRUMENTS
A DIVINON OF CAS INC
FULLERTON CALHORNIA
MADE HN US A
BALANCED
5 pred CAUTION: TO REDUCE THe RISK LEVEL SEL. |
OF FIRE, REPLACE ONLY WITH THE ` N
- 250 V T | SAME TYPE SA . 250V FUSE. ACTIVE CROSSOVER nd Le Lt hd
- erelors FOOT | М N PN 017018 > NN
INP SWITCH L LOW IMPEDANCE ELECTRONIC LEVEL TRIM
AC POWER CORD UT OUTPUT BALANCE LEVEL OUTPUT CONNECTOR CROSSOVER CONTROL
JACK SELECT SWITCH
120 VOLT
50/60 HZ |
"REAR PANEL
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— SPEAKER JACKS
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"REAR PANEL FUNCTIONS
- Two standard 1/4 inch phone jacks are provided
for connection to aspeaker (s). Itis very important
that the total load connected to the amplifier not
be lower than 4 ohms. The amplifier will provide
—… . 300 watts average power to a 4 ohm load. The load
—. resistance may be greater than 4 ohms and the
~~ “amplifier will operate correctly, except that the
total power output will be less than 300 watts. A
malfunction of the amplifier. Typical use of the
total load impedance less than 4 ohms may cause
~ speaker jacks would be one 4 ohm speaker
_ connected to one jack (the other jack not used) or,
one 8 ohm speaker connected to each of the two
‘speaker jacks (a total of two speakers being used).
SPEAKER FUSE
The speaker fuse provides protection for the
connected speakers in the event of amplifier
failure and also provides protection for the
amplifier from improper loads. Replace only with
- an8 amp 250 volt quick-acting type.
PRE-AMP OUTPUT
The signal developed at the output of the pre-
amplifier section is available at this jack for
connection to an additional power amplifier or
other accessory device. The output is capable of
driving a load impedance of 600 ohms or greater.
POWER AMPLIFIER INPUT
This jack provides a high impedance (50K ohms)
input to the power amplifier section. Use of the
jack disconnects the internal pre-amplified signal.
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EFFECTS OUTPUT
This jack provides a signal to be used as the input
to a special effects device. The effects device
should be capable of handling a line level signal
and should have an input impedance of at least
10K ohms. |
EFFECTS INPUT | |
This jack is provided for connection to the output
of a special effects device. The inputimpedanceis
100K ohms. | |
FOOT SWITCH
This jack is used for connection of an optional
foot switch, which provides for remote control
(ON/OFF) of the parametric equalizer and the
etfects signal loop. | | о
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LINE OUTPUT
This 1/4 inch phone jack provides a single ended
line level output signal as selected by the line
output selector switch. The three-pin connector
provides the same signal, transformer isolated, at
either line or microphone level as selected by the
level select switch.
LINE OUTPUT SELECT SWITCH
This four position slide switch selects the point in
the amplifier at which the line output signal is
derived. The four choices are as follows:
1. After the first amplifier stage and before any
tone controls. (Pre-tone)
2. After the tone controls but before the equalizer
controls (Post-tone)
3. After the equalizer controls but before the
effects return or compressor (Post-equalizer).
This output is independent of the Front Panel
equalizer ON/OFF switch.
4. Following the compressor: in this position the
signal is the same as at the pre-amplifier output
jack (Post-compressor).
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ELECTRONIC CROSSOVER
~The electronic crossover consists of a frequency
control, a high pass output jack, and a low pass
output jack. Also provided are level trim controls
for both the high and low pass outputs. These
controls must be adjusted using a screwdriver.
~ The frequency control provides simultaneous
adjustment of the cutoff frequency of the high
pass and low pass filters from approximately 200
‘Hz (full counter-clockwise) to approximately 2
KHz (full clockwise). Both the high pass and low
pass outputs are at line level and will operate into
a load impedance of 2K ohms or greater. Whileitis
beyond the scope of this manual to discuss the
merits of bi-amplification, Figure 1, shows one
possible system connection. The internal power
amplifier is used to amplify the low pass output
ELECTRONIC CROSSOVER (CONT)
(low frequency portion of the signal) and an
auxiliary amplifier is used to amplify the high pass
output (high frequency portion of the signal). The
low frequency amplifier should be connected to a
speaker system designed to reproduce the bass
frequencies. The high frequency amplifier should
be connected to a speaker system designed to
reproduce the mid and high frequencies. (SEE
FIGURE 1).
NOTE: The frequency control on the 300 watt
Bass Amplifier must be adjusted to the
proper crossover frequency determined
by the speaker combination that is to be
used.
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CABLE
| 4 OHM BASS
SPEAKER
IN
SPEAKER
JACK ~
SPEAKER CORD
X
INPUT
OUTPUT
‚ 300 WATT
POWER ms BASS AMPLIFIER
HIGH BASS OUT
NON SHIELDED | > » —-
LOW
PASS OUT
STD. GUITAR
(1/4” PHONE PLUG ,
| AUXILLARY
POWER
AMPLIFIER
MID/HIGH
FREQUENCY
SPEAKER
FIGURE 1 BI-AMPLIFICATION CONNECTIONS
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AMPLIFIER PROTECTION DEVICES
The 300 watt Bass Amplifier has been provided
With a number of automatic protective devices.
The speaker fuse and electromagnetic line circuit
breaker have already been described. In addition
there are two internal temperature controlled
switches. One switch increases the speed of the
cooling fan if the heatsink temperature exceeds
60° C (140° F). The second switch will disconnect
~ the amplifier load (speaker) and therefore prevent
use of the power amplifier if the heatsink
a temperature exceeds 85°C (185°F). When the
heatsink temperature returns to a safe level the
speaker is reconnected.
RACK MOUNTING
The 300 watt Bass Amplifier can be mounted in a
standard 19 inch rack enclosure. The enclosure
must have sufficient depth to accommodate the
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unit and must be provided with adequate .
ventilation. Before mounting,the decorative wood
side panels must be removed by unscrewing the
two phillips head screws holding each wood side
panel on. (One side panel holds the handle).
When the unit is rack mounted, rigid mechanical
support MUST be provided for the rear of the
chassis. The exact configuration of the rear
support will depend upon the rack cabinet being
used. Be sure not to block any of the ventilation
openings in the chassis.
‘CORRECTIVE CHECK LIST
IT your amp is set up but does not function, check
the following items: | | |
® Is the amp power supply cable plugged into
an electric outlet? | ВЕ
® Is there power at the outlet where the amp is
plugged in? as |
® Is the speaker plugged in the amp speaker
jack? |
® Are all the control knobs turned up above 4?
e Is the volume control on your instrument
turned up?
e Is the fuse good? В |
If, after checking all of the above, the system is still
not performing correctiy, consult your Fender
Service Dealer. | | | |
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REPLACEMENT PARTS
Under the terms of the limited warranty, defective
parts will be replaced by your authorized Fender
Dealer. |
Fender Original Equipment is designed and built
to provide optimum performance in musical
instrument amplifiers.
Fender Musical instruments furnishes warranty
Service through authorized Fender dealers.
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300 BASS AMPLIFIER SPECIFICATIONS
Input Power: 120V, 50/60 Hz, 600 watts Equalizer Amplitude +15 dB, typical
Maximum Output 300 Watts average at less Response: |
.. power: than 1% THD. 20 Hz to Maximum Voltage 65 dB, typical
_ | 20KHz into 40 | Gain:
‚Tone Control +15 dB, typical Input Impedance: — 1 Meg (2, typical
Range: ВО | Maximum Equivalent -100 dBv
Equalizer Frequency 1/3 Octave from 40Hz to Input Noise: oo
Selection: — 1KHZ in three bands
PHYSICAL DIMENSIONS (APPROXIMATE, FOR SHIPPING PURPOSES)
Width: 19 inches (48.3cm)
Depth: | 18.5 inches (47cm)
Height: 3.5 inches (8.9cm)
Weight: - 33 pounds (15kg)
NOTE:
SEE ACCOMPANYING LIMITED WARRANTY
REGISTRATION SHEET
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MADE IN U.S.A.
PO. BOX 4137 + FULLERTON, CA 92634
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