Page 1
CONTENTS
(click on a topic to view)
Congratulations Functions
Features and Specifications System Tuning
Mounting Frequency Distribution
Mounting System Diagram
Wiring Troubleshooting
Wiring Block Diagram
Functions Warranty
PEQ114 Four Band Preamplifier / Equalizer OWNERS MANUAL POWER CLASS
TM
Page 2
Caution!
The extended use of a high powered audio system may
result in hearing loss or damage. While
PrecisionPower
systems are capable of
"Concert Level"
volumes with
incredible accuracy, they are also designed for you to
enjoy at more reasonable levels all of the sonic subtleties
created by musicians. Please observe all local sound
ordinances.
for choosing
PrecisionPower
audio epuipment. At
PrecisionPower
we
proudly design, engineer and manufacture audio products at our facility in
Phoenix, Arizona. Our award winning engineering team utilizes innovative
technology to consistently deliver Absolutely State of the Art
TM
performance,
sound quality, reliability, and value. This
PrecisionPower
product reflects
our commitment to offer you unparalleled versatility and quality for years of
dependable service and listening enjoyment.
Service
Do not attempt to service
PrecisionPower
products yourself.
Performing exploratory surgery on your audio equipment yourself
will void the warranty. Many parts of your
PrecisionPower
gear
are custom built to our specifications. Our factory parts are not
made available to anyone else nor are they for sale. Our goal
is to make sure that your
PrecisionPower
product will always
sound as good as the day it was purchased. Contact your
authorized
PrecisionPower
dealer about obtaining any warranty
service through
PrecisionPower
.(See Warranty insde back cover)
FOR YOUR RECORDS:
Model
Serial Number
Purchase Date
Congratulations and thank you.....
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Page 3
Specifications
Signal-to-Noise Ratio 102dB
Total Harmonic Distortion (1 kHz, 1 VRMS) 0.0074%
Boost/Cut Range
±
12dB
Equalizer Center Frequencies:
Band Frequency
Sub 40 Hz
Low 100 Hz
Mid 2 kHz
Treble 6.5 - 26 kHz (Shelf EQ)
Maximum Input Voltage (Flat) 3.5 VRMS
Maximum Output (10 kΩ Load) 8.5 VRMS
Frequency Response 10 Hz to 100 kHz
Supply Voltage 11 - 15 VDC
Dimensions 3.20" L
6.75" W
0.95" H
FEATURES / SPECIFICATIONS
1
4 Band Graphic Equalizer
Preamp Line Driver
Ultra-Wide Bandwidth Circuitry
Adjustable Input Sensitivity
Center-Detented Boost/Cut Controls
12dB Boost/Cut for Each Band
Gold-plated RCA Input and Output Connectors
PWM (Pulse Width Modulated) Power Supply
Designed and Handcrafted in the U.S.A.
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Page 4
Mounting
To prevent damage to the
PEQ-114
while driving, mount it in a
secure place. Choosing the appropriate location will depend
upon your vehicle and the complexity of your system design. Typical
mounting locations for your new
PEQ-114
would be in the dash or
center console. Never mount the component in a location that would
subject it to immersion or exposure to water.
2
MOUNTING
Once a location has been chosen, securely mount the
PEQ-114
using
the two supplied brackets. There are two different sets of brackets
included with your
PEQ-114
. One set is used to flush mount the
equalizer, as shown above. The other set is used for surface mount,
as shown on the next page. The brackets are connected to the
equalizer/preamp by two 6-32 x 1/4" socket head cap screws. We
have made the brackets adjustable to compensate for the uniqueness
of each vehicle. Be Careful! Inspect the area underneath to be sure
you are not drilling into wires, etc. that could be damaged by the drill
bit or screws.
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Page 5
MOUNTING
3
Sub
+
PEQ-114
Volume
Power
Low
+
Mid
+
Treble
+
R
L
Precision
Power
PEQ-114
Made in USA
R
L
Sensitivity
Input
Input
Output
Power
Bracket can be reversed
for installer's individual needs.
We suggest securing to
surface with a #6 metal screw.
Adjustable slots
for screws
Surface mounting
bracket.
Sub
+
PEQ-114
Volume
Power
Low
+
Mid
+
Treble
+
R
L
Precision
Power
PEQ-114
Made in USA
R
L
Sensitivity
Input
Input
Output
Power
Adjustable slots
for screws
Secure the bracket
to the PEQ-114
with the two 6-32x1/4"
screws provided.
Dimensions
6.75"W
3.20" L
0.95"H
Sub
+
PEQ-114
Volume
Power
Low
+
Mid
+
Treble
+
R
L
Precision
Powe r
PE Q - 1 14
Made in USA
R
L
Sensitivity
Input
Input
Output
Power
Secure the bracket
to the PEQ-114
with the two 6-32x1/4"
screws provided.
Faceplate of bracket blank for installer's
individual needs. We suggest using a
#6 metal screw. Predrill a hole in the
location desired to mount the PEQ-114.
Adjustable slots
for screws
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Page 6
NOTE
4
WIRING
Before beginning, disconnect the negative (-) terminal of the
battery prior to working on the positive (+) terminal to prevent
a short to ground. This is important, unless you want to spend
the rest of your life with a nickname like
"Sparky ,"
or
"Smokey."
Reconnect the negative terminal only after all connections have
been made.
Fuse must be
installed within
18" of battery
Drill a hole in the firewall
and use a rubber grommet
to keep wire from shorting.
Run the cables under the
carpet near the side of the
vehicle. Be careful not to
drill or screw into the wires
when you replace the trim.
Run signal cables (RCAs)
and remote turn-on lead
down the opposite side of
the vehicle of the power
wire to avoid radiated noise.
Firmly attach Ground
Wires to solid metal.
Avoid sharp edges that
could chafe through the
insulation.
Positive
Battery
Terminal
Factory Ground wire may
need to be replaced if it is
frayed or broken.
For systems over 300 watts,
add a ground cable from the
amp to the battery.
Volume
Fader
Defeat
Sub Low Low-Mid
High-Mid Treble
PAR-245
Power
In-Clip
+
++++R
F
eject
VOLUME
BASS
TREBLE
RIGHT
LEFT
BALANCE
TRACK
REVERSE
FOWARD
123
4
876
5
PPI
MARKET
INGDPT
Trk 1
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Page 7
5
The next step is to connect the Power , Ground, and Remote wires to
your
PEQ-114
. The power wire should run from the mounting location
through the vehicle to the battery or power distribution block. Avoid
sharp corners, creases, and sharp body parts. When passing through
any metal wall (i.e. firewall etc.), a grommet must be used to prevent
the wire from chaffing and shorting to ground.
The ground wire should be of the same gauge as the power wire. As
a rule of thumb, use as short a length of wire as possible.
Find a location near the equalizer that is metal (the floor is ideal) and
clean an area about the size of a quarter to bare metal. Drill a pilot
hole in the middle of this area. Be Careful! Inspect the area underneath
to be sure you are not drilling into wires, brake or fuel lines, etc.
Terminate the wire with a ring connector and attach it to the bare
metal using a #8 sheet metal screw and washer (not supplied). We
suggest crimping and/or soldering this connection. After the connection
is complete, coat the area with silicone or some similar material to
prevent rust from developing.
Finally, the remote wire needs to
run to the power antenna (or
amplifier remote) lead of the head
unit. This wire supplies a 12 volt
signal to the
PEQ-114
when the
main system is activated.
Once you have routed the power ,
ground, and remote wires through
the vehicle, it is time to connect the wires to the
PEQ-114
. Be sure
that you have not reconnected the ground cable to the negative post
of the battery.
Cut off excess wire and, using wire strippers, strip the power, ground
and remote cables about 1/8 inch. Locate the power, ground, and
remote
Powerlock
connector (supplied). On the top of the connector
are three slotted screws. With a small flat-bladed screwdriver , loosen
the screws before attempting to insert the cables. After you have
inserted the stripped end of each cable into the connector, secure it
by tightening the associated screw. Check that each connection is
tight. If the wires are secure, the connector may be plugged into the
PEQ-114
.
Remote
Ground
Powe
r
T/O
B+
Powerlock
WIRING
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Page 8
Sub
+
PEQ-114
Volume
Power
Low
+
Mid
+
Treble
+
1. 2. 3. 4. 5.
6.
6
FUNCTIONS
1. Volume
Set the source unit at 3/4 full volume, and use this control as the
Master volume control.
2. Sub
Subwoofer (40 Hz) Boost/Cut control.
3. Low
Low (100 Hz) Boost/Cut control.
4. Mid
Midrange (2 kHz) Boost/Cut control.
5. T reble
Treble (6.5 kHz - 26 kHz, Shelving) Boost/Cut control.
6. Power LED
Red light indicates power on.
15
12
9
6
3
0dB
-3
-6
-9
-12
-15
-18
-21
-24
-27
-30
30
50 70 100
Hz
200 300 500
700 1K
5K 10K 20K
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Page 9
7
R
L
Precision
Power
PEQ-114
Made in USA
R
L
Sensitivity
Input
Input
Output
Power
7.
8. 9.
10.
7. Input Sensitivity
Sets input gain to match the output level from the source unit
(See Page 8).
8. Input
Gold plated RCA inputs. Plug in the RCA cables from the source
unit here.
9. Output
Gold plated RCA outputs. Plug in the RCA cables to your
amplifier here.
10. Power
After connecting the Power, Ground and Remote wires, plug in
the PowerLock connector here.
FUNCTIONS
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Page 10
8
In order to achieve maximum signal-to-noise performance from
a high quality auto stereo system, it is desirable to use high
signal levels wherever possible in the interconnect cables. High signal
levels will reduce the effect of induced noise. The peak level of an audio
signal is usually determined by the clipping level of electronic
components. The following procedure should be used as a guide before
the system installation is completed.
Adjustment of source unit output and
PEQ-114
input:
1. Turn
PEQ-114
volume control fully counterclockwise.
2. Turn source unit volume 1/2 to 3/4 of maximum.
3. Adjust the
PEQ-114
input gain fully counterclockwise.
4. Play a CD or cassette. A loud music selection is desired.
5. Turn
PEQ-114
volume control clockwise to a comfortable
listening level, about 1/2.
6. Adjust the input gain control clockwise until the onset of
audible distortion. Then adjust the control counterclockwise
slightly. This setting will minimize system background
noise and prevents overloading the
PEQ-114
.
The four bands (Sub, Low, Mid, and Treble) on your
PEQ-114
have been designed to adjust the frequencies that are most
often out of balance in a car.
1. To achieve the tonal balance you desire, listen to
some favorite music selections with the
PEQ-114
bands set “flat”, that is, with the knobs straight up.
Listen for individual instruments that seem too loud
(or too soft) and look up the instrument in the
Frequency Distribution chart on the facing page to
see which frequencies they represent.
2. Looking at the Diagram on page 6, find the boost/cut
control that best matches the instrument you want to
adjust.
3. Turn the control down (or up) until the instrument
blends with the rest of the music.
System Gain Adjustment
SYSTEM TUNING
Adjusting Y our Equalizer
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Page 11
9
FREQUENCY DISTRIBUTION
electric guitar
acoustic guitar
violin
cello
double bass
trumpet
french horn
trombone
tuba
soprano sax
tenor sax
clarinet
oboe
flute
piano
synthesizer
female vocal range
male vocal range
tympani
kick drum
tom drum
snare drum
cymbals
electric bass
FUNDAMENTAL NOTE
HARMONIC OR OVERTONE
25 50
100
200 400 800 1.6 3.2 6.4 12.8 20K
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Page 12
10
SYSTEM DIAGRAM
eject
VOLUME
BASS
TREBLE
RIGHT
LEFT
BALANCE
TRACK
REVERSE
FOWARD
123
4
876
5
PPI
MAR KET
ING DPT
Trk 1
Source Unit
POWERCLASS
™
4 channel Amplifier
Front High Pass 100Hz
Rear Low Pass 100Hz
Subwoofer Subwoofer
Passive
Crossover
Tweeter
MidRange
Passive
Crossover
Tweeter
MidRange
PEQ-114
Preamp/Equalizer
Sub
+
P
E
Q
-114
Volume
Power
Low
+
Mid
+
Treble
+
R
L
Precision
Power
PEQ-114
Made in USA
R
L
Sensitivity
Input
Input
Output
Power
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Page 13
11
TROUBLE SHOOTING
ANY SOUND NOW?
NO
Check Power and Remote turn-on wire
for voltage. Make sure Ground wire is
secure.
YES
Check Input cables for signal by
connecting them to the next
component in line.
NO SOUND
YES
Problem is in the Equalizer. See your
local Authorized
PrecisionPo wer
Dealer
or call1-800-62
POWER
.
NO
Problem is elsewhere in the system.
Check head unit and amplifiers.
Is the LED lit?
SOUND IS NOW IN
OPPOSITE CHANNEL
Reverse RCA inputs.
SOUND IS NOW IN
OPPOSITE CHANNEL
Reverse RCAs at head unit.
SAME CHANNEL
Problem is in the Equalizer. See your
local Authorized
PrecisionPo wer
Dealer
or call 1-800-62
POWER
.
SOUND IS NOW IN
SAME CHANNEL
Problem is in the RCA cables.
OPPOSITE CHANNEL
Problem is in the head unit.
SAME CHANNEL
Problem is in the amplifier, speakers or
associated wiring of the silent channel.
SOUND IN ONE CHANNEL ONLY
Check Balance control.
Reverse left and right RCA outputs.
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Page 14
12
BLOCK DIAGRAM
RCA
Left Input
RCA
Left Output
RCA
Right Output
RCA
Right Input
4 BAND EQUALIZER
VOLUME
CONTROL
4 BAND EQUALIZER
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Page 15
WARRANTY
Three-Year Limited U.S.A. Warranty
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
PrecisionPower
warrants its products to be free from defects in materials and
workmanship under normal use and service for a period of three (3) years from the date of
original purchase when the unit is installed by an Authorized Dealer. Non-Authorized Dealer
installed products carry a one (1) year parts and ninety (90) days labor limited warranty. The
extent and conditions of Limited Warranty are as follows:
1. Authorized Dealer Installed Products:
PrecisionPo wer
will either repair or replace at no charge,
to the original purchaser, any unit which
PrecisionPower’s
examination discloses to be defective
and under warranty, provided the defect occurs within three (3) years from the date of original
purchase when the unit is installed by an Authorized Dealer and the product is returned immediately to
PrecisionPower
. This warranty is not transferable.
2. Non-Authorized Dealer Installed Products:
PrecisionPower
will either repair or replace at no
charge, to the original purchaser, any unit which
PrecisionPower’s
examination discloses to be
defective and under warranty , provided the defect occurs within ninety (90) days from the date of
purchase and the product is returned immediately to
PrecisionPower
. Warranty claims beyond
ninety (90) days for Non-Authorized Dealer Installed Products will be for parts only and will
extend for one (1) year from the date of purchase. This warranty is not transferable.
3. The date of purchase and proof of Authorized Dealer Installation of a PrecisionPower product
must be established by an original sales receipt which must accompany the article being returned for warranty work.
4. This warranty shall NOT apply to any
PrecisionPower
product found to have the original fac-
tory serial number removed or defaced. All products received (by
PrecisionPower
) for in warranty or out of warranty repair, with their original serial numbers removed or defaced, will NOT be
repaired and will be returned to sender, freight collect. Refer to original packaging for the serial
number of your component speakers.
5. The provisions of this warranty shall not apply to any
PrecisionPower
product used for a
purpose for which it is not designed, which has been repaired or altered in any way , or which has
been connected, installed, or adjusted other than in accordance with the instructions furnished in
PrecisionPower’ s
owner’s manual. Nor shall this warranty apply to any part which has been
subject to misuse, neglect, or accident.
6. PrecisionPower does not authorize any other persons to assume any other liability in connection with its products. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY MADE BY
PRECISIONPOWER APPLICABLE TO ITS PRODUCTS. ANY IMPLIED WARRANTY OR MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE APPLICABLE TO
PRECISIONPOWER PRODUCTS IS LIMITED IN DURATION TO THE DURATION OF THIS
LIMITED WARRANTY. PRECISIONPOWER SHALL NOT BE LIABLE FOR THE INCIDENTAL,
CONSEQUENTIAL, OR COMMERCIAL DAMAGES RESUL TING FROM THE BREACH OF THIS
WRITTEN WARRANTY. Some states or provinces do not allow the exclusion or limitation of
incidental or consequential damages or limitations on how long an implied warranty lasts; so the
above limitations or exclusions may not apply to you.
7. Your product will be serviced on an in-warranty basis within the warranty period for the correction of warranted defects. If improper operation of your
PrecisionPower
product should occur,
contact your Authorized Dealer for assistance with the return and factory repair of your
PrecisionPower
product. If an Authorized Dealer is not available, return the unit including your name, telephone
number, return address, a copy of your sales receipt, and a description of the problem to:
PrecisionPower,Inc.
Service Department
4829 S. 38th Street
Phoenix, AZ 85040-2964
TO RETURN PRECISIONPOWER PRODUCTS OUT OF W ARRANTY : Return the unit, postage
prepaid, in the original protective carton. Please include a description of the problem and, if
desired, a request for an estimate of repair costs. Unless a request for an estimate is included,
the unit will be repaired as necessary. Please contact
PrecisionPower
Customer Service at 1800-62-POWER for questions concerning out of warranty repair charges. Repaired unit will be
returned with an itemized statement, C.O.D.
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