LINEAR POWER EQ-1, EQ-1-D Equalizer OWNER'S MANUAL AND INSTALLATION GUIDE

Below you will find brief information for Equalizer EQ-1, Equalizer EQ-1-D. The EQ-1 and EQ-1-D are 6 band equalizers with input level gain matching for the source unit. Each band of equalization is controlled by a precision slider control, with the controlled frequencies chosen to give the best over response from your car stereo equipment.

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MODEL EQ-1&copy; and EQ-1-D
(1983-MSRP $149.00)
OWNER'S MANUAL AND
INSTALLATION GUIDE
EQUALIZER
INTRODUCTION
The EQ-1 and EQ-1-D&copy; is 6 band equalizer with input level gain matching for the
source unit. Each band of equalization is controlled by a precision slider control,
with the controlled frequencies chosen to give the best over response from your
car stereo equipment.
TECHNICAL DESCRIPTION
POWER SUPPLY:
The EQ-1 and EQ-1-D&copy; include internal suppression for freedom from external
noise. A unique ultrasonic inverter provides a negative 14 volts to facilitate the
unusual high output voltage. The EQ-1 and EQ-1-D are fully protected against
accidental power reversal.
CONSTRUCTION FEATURES:
All components are securely mounted to a rugged two piece glass-epoxy printed
circuit board assembly, minimizing internal wiring which could vibrate loose. A
heavy aluminum extrusion and precision machined faceplates combine to form a
rugged unitized chassis. All construction and assembly is performed in-house,
insuring highest quality, and each unit is fully tested, inspected, and re-tested
before shipping.
&copy; 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™ is a trademark of Linear Power, Inc.
1
INSTRUCTIONS
Read the following instructions completely through. If it appears too complicated,
we recommend that you have an authorized LINEAR POWER™ dealer do the
work.
IMPORTANT !!!
THE FREQUENCY CHIP MUST BE PROPERLY INSTALLED AND LOCKED
FIRMLY IN POSISTION PRIOR TO OPERATION IN ORDER TO PREVENT
THE POSSIBILITY OF SEVERE SYSTEM DAMAGE.
MOUNTING
As the XO-1&copy; contains no user operated controls, the best mounting location is
close to the amplifiers. The XO-1&copy; should be mounted in a position such that the
access plate (the one with no wires) can be removed for easy frequency change,
and that the output fan-outs can plug directly into the amplifiers. To prevent
electrical interference it is advisable that phono extensions be kept to the
minimum lengths necessary.
In some trunk mount applications, a good method for mounting bi-amp and triamp systems is to fashion a mounting plate made of 1/2 to 1/4 inch plywood and
attach it to the back of the rear seat in the trunk. This will provide a secure base
for attaching XO-1&copy; and amplifiers and will make drilling multiple mounting holes
through sheet metal unnecessary.
WIRING
Refer to the diagrams that follow. NOTE: ALL CONNECTIONS MUST BE
ELECTRICALLY AND PHYSICALLY SOUND. AVOID RUNNING POWER
CABLES AND SIGNAL CABLES ALONGSIDE ONE ANOTHER.
1. POWER
Your XO-1&copy; can be connected in one of several ways:
A. Connect the XO-1&copy; red wire to the power antenna wire of the music source if
the power antenna wire is &quot;hot&quot; when the source is on. The power antenna wire
is turned off on some units when the antenna is raised up all the way or when the
tape selection is used. For these units, and for units with no power antenna
&copy; 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™ is a trademark of Linear Power, Inc.
2
wires, use the alternate methods &quot;B&quot; or &quot;C&quot;.
B. The XO-1&copy; red wire can be connected along with the amplifier remote turn-on
(trigger) wire to a CS-1 current sense adaptor (available as an accessory through
an authorized LINEAR POWER dealer).
C. The XO-1&copy; red wire can be connected through a toggle switch (current rating
is not important) to the fuse panel. IMPORTANT: THE XO-1&copy; POWER WIRE
SHOULD NOT BE DIRECTLY CONNECTED TO A SOURCE OF POWER
WHICH WILL BE HOT EVEN WHEN THE IGNITION IS TURNED OFF, AS
BATTERY DRAIN MAY OCCUR AFTER AN EXTENDED PERIOD.
MAIN GROUND
Connect the black ground wire to a car chassis ground, preferably to the same
point at which the amplifiers are grounded.
2. INPUT
Connect the right and left inputs on the XO-1&copy; to the right and left outputs from
the music source. If the output of the music source is high level (designed to
connect directly to a speaker) obtain a set of high level adaptor plugs from your
LINEAR POWER dealer and follow the enclosed directions.
3. OUTPUTS (BI-AMP)
Low Frequency:
Connect the right and left low frequency outputs from the XO-1&copy; to the right and
left inputs on the low frequency amplifier. The low frequency speakers (woofers)
can then be connected to the output of the low frequency amplifier.
High Frequency:
Connect the right and left high frequency outputs from the XO-1&copy; to the right and
left inputs on the high frequency amplifier. (See DIAGRAM A for
interconnections.)
4. OUTPUTS
(Mono-bridge subwoofer)
In a mono subwoofer system, the low frequency amplifier's outputs are strapped
together (bridged) by the XO-1&copy; to sum the power of both channels into one to
drive a single 8 ohm woofer. In this configuration, both of the speaker ground
wires are unused and should be taped and dressed away from the other wiring.
The woofer can then be connected directly across the right and left speaker
output &quot;hot&quot; wires from the low frequency amplifier by attaching the green wire to
the woofer positive terminal and the grey wire to the negative terminal.
&copy; 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™ is a trademark of Linear Power, Inc.
3
Follow DIAGRAM B for high and low frequency connections and check to see
that the mono-stereo switch inside the XO-1&copy; is in the &quot;mono&quot; position.
CAUTION: WHEN BRIDGING AN AMPLIFIER, THE SPEAKER IMPEDANCE
MUST NOT BE LESS THAN 8 OHMS, AND MUST NOT BE GROUNDED AT
ANY POINT.
5. OUTPUTS
(Tri-amp System)
In a tramp system, individual amplifiers are used for bass, midrange, and treble
frequencies. In this configuration, two XO-1's&copy; are &quot;cascaded&quot; in order to obtain
the third frequency range. (See DIAGRAM C for interconnections.)
All crossovers that are not PHASE COHERENT will cause some phase shift at
the crossover point. In a three way system with two crossovers, there will be
phase shift at both crossover points. By reversing the electrical phase of the mid
range driver, relative to the woofer and tweeter phase, this phase shift will be
compensated so that the system will be acoustically in phase, though electrically
out of phase. In most cases the system will sound better with the phase of the
mid range drivers reversed. Although this sound complicated, it is really quite
simple to do. After your system is installed and operating, reverse the leads to
your mid range drivers, so that the positive (+) lead from the amp is connected to
the negative (-) terminal on you speaker, and the negative (-) terminal to the
positive (+) lead on the amp. Listen to the system, then return the leads to their
original positions and listen again. Connect the leads in whatever position
achieved the best sound.
OPERATION/ADJUSTMENT/USE
1. CROSSOVER FREQUENCY SELECTION
A. Remove the access plate on the XO-1&copy;. IMPORTANT: IT IS NECESSARY
THAT ALL POWER TO THE SYSTEM BE TURNED OFF PRIOR TO NETWORK
REMOVAL/INSERTION.
WE REPEAT THE WARNING: DAMAGE TO YOUR SPEAKERS CAN BE
CAUSED BY REMOVING THE RESISTOR NETWORK WHEN THE SYSTEM IS
TURNED ON!
&copy; 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™ is a trademark of Linear Power, Inc.
4
B. Release latch on socket (lever up-release, Lever down-lock).
C. Carefully insert network.
D. Lock the network in the socket. NOTE: CHECK TO SEE THAT THE &quot;STEREO
- MONO&quot; SWITCH IS IN THE CORRECT POSITION.
E. Access plate can now be replaced.
SYSTEM ADJUSTMENT/USE- Recheck all wiring and connections and apply
power to system. Set all tone controls to &quot;flat&quot; (no cut or boost) position and
adjust volume to a comfortable level. Select a variety of program material,
preferably music that you know to be fairly accurate and containing deep bass as
well as high treble passages.
Increase volume of music source to approximately 3/4 of maximum. Adjust
variable gain on bass amplifier slowly clockwise just to the point where audible
distortion becomes noticeable, then turn gain control counterclockwise slightly.
Adjust the gain control on the midrange amplifier until you obtain balance to the
bass tones. Follow the same procedure for adjusting the gain of the treble
amplifier. Proper tonal balance will require some careful listening and
readjustment.
Volume can then be controlled by the music source volume control.
CROSSOVER FREQUENCY SELECTION
Selection of the proper crossover frequency depends on the driver selected and
the way in which they are used. For subwoofer operation, crossover frequencies
between 80 and 150 Hertz are generally preferred. For use between separate
drivers of a two or three way system, there is much more variance in the potential
choice of crossover frequencies. If a tweeter, say, has a response of 1200 to
22,000 Hertz, and a woofer a response of 28 to 2400 Hertz, the overlap area
would be between 1200 and 2400 Hertz (the tweeter's lower end and the
woofer's upper end). The difference between these two frequencies is ONE
octave. (Octaves are logarithmic, meaning that each octave is double the
frequency in Hertz of the previous octave. So, if 20 to 40 Hertz is the first octave,
then 40 to 80 Hertz is the second octave.) The proper crossover choice is usually
about half of the octave difference of the overlap area. In the case above, since
the overlap area is one octave, the crossover point would be at one half octave,
or 1800 Hertz.
&copy; 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™ is a trademark of Linear Power, Inc.
5
SERVICE OR REPAIR
To obtain modification, service or repair, please contact our ONLY Authorized
LINEAR POWER™ Product Service Center:
T.I.P.S. INC.
3455 Lanell lane, Pearl, MS 39208
(601) 932-8477
E-mail: [email protected]
SPECIFICATIONS
XO-1&copy;
Output Level:
Total Harmonic
Distortion:
Inter-modulation Distortion:
0 to 5 volts
0.05% maximum
0.01% typical
0.01% maximum
&copy; 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™ is a trademark of Linear Power, Inc.
6
Input Impedance:
Gain:
Frequency Response:
Current Draw:
Crossover Points:
Crossover Slope:
10,000 ohms
Unity (Input = Output)
+1dB 4 Hz to 250 KHz
25 mA maximum
50 Hz to 6 KHz in
1/3 octave steps
12dB per octave
&copy; 2008 Linear Power, Inc. - ALL RIGHTS RESERVED
LINEAR POWER™ is a trademark of Linear Power, Inc.
7
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Key features

6 band equalizer
Input level gain matching
Precision slider controls
Internal noise suppression
Ultrasonic inverter
High output voltage
Rugged construction
Fully tested

Frequently asked questions

The EQ-1 and EQ-1-D are 6 band equalizers designed to improve the sound quality of your car stereo system by allowing you to adjust the frequencies of the audio signal.

Each band of equalization is controlled by a precision slider control. These controls allow you to boost or cut specific frequencies in the audio signal, resulting in a more balanced sound.

The EQ-1 and EQ-1-D feature internal noise suppression, a unique ultrasonic inverter that provides a negative 14 volts for high output voltage, and rugged construction with fully tested components.

The manual provides detailed instructions for mounting and wiring the EQ-1 and EQ-1-D to your car stereo system. It's important to follow these instructions carefully to ensure proper operation and prevent damage.