Precision Power EQP Owners Manual

Thank you for choosing PPI audio epuipment. Now, HANG ON! PPI
products are engineered and manufactured to deliver a wild ride of
performance, sound quality, and reliability. This PPI product reflects our
commitment to offer you versatility and quality for years of incredible power
and listening enjoyment!

SERVICE

Do not attempt to service PPI products yourself. Performing exploratory
surgery on your audio equipment yourself will void the warranty. All parts of
your PPI gear have been built to our specifications. These parts are not
made available to any unauthorized PPI dealer nor are they for sale. Our goal
is to make sure that your PPI product will always perform as good as the day
it was purchased. Contact your authorized PPI dealer about obtaining any
warranty service through PPI. (See Warranty inside back cover.)

CAUTION!

The extended use of a high powered audio system may result in hearing loss
or damage. While PPI systems are capable of "Concert Level" volumes,
they are also designed for you to enjoy at more reasonable levels all of the
creative expressions made by musicians. Please stay seated while driving
and observe all local sound ordinances.

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5 Band Equalizer with Parametric Sub Band
Preamp Line Driver
Front/Rear Outputs with Fader Control
Subwoofer Crossover (60, 80, 120Hz)
Separate Subwoofer Frequency and Level Controls
Center-Detented Boost/Cut Controls for Each Band
Auxiliary Input
Selectable Illumination
Defeat Switch
Gold-plated RCA Input and Output Connectors
Independent L & R Input Gain Adjustments

Signal-to-Noise Ratio 110 dB
Total Harmonic Distortion (1 kHz, 1 VRMS) 0.03%
Boost/Cut Range ±12 dB
Equalizer Center Frequencies:
Band Frequency

Sub 40-120Hz
Low 250Hz
Low-Mid 500Hz
High-Mid 2kHz

Treble 10kHz
Maximum Input Voltage (Flat) 2.0 VRMS
Maximum Output 6.7 VRMS
Frequency Response 1.5 to 20kHz
Supply Voltage 9 - 15 VDC
Dimensions 4.60" L

6.75" W

0.95" H

2

To prevent damage to the PPI-EQP 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 PPI-EQP 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.

Once a location has been chosen, securely mount the PPI-EQP using the

two supplied brackets. The brackets are connected to the equalizer/preamp
by two 3mm x .5mm x 6mm phillips head 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.

Surface mounting bracket.

Adjustable slots for screws.

Secure the bracket to
the PPI-EQP with the
two 3mm x .5mm x 6mm
screws provided.

3

Bracket can be reversed for
installer’s individual needs. We
suggest securing to surface with
a #8 metal screw.

Secure the bracket to
the PPI-EQP with the
two 3mm x .5mm x 6mm
screws provided.

Adjustable slots for screws.

4

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.

5

The next step is to connect the Power, Ground, and Remote wires to your

PPI-EQP. 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
PPI-EQP 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 PPI-EQP. 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 PPI-EQP.

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1. Power: After connecting the Ground, Remote and Power wires, plug

in the PowerLock connector here.

2. Main Input: Gold plated RCA inputs. Plug in the RCA cables from

the source unit here.

3. Auxiliary Input: Gold plated RCA inputs. Plug in the RCA cables

from the auxiliary source unit here.

4. Front Output: Gold plated RCA outputs. Plug in the RCA cables to

your front channel amplifier here.

5. Rear Output: Gold plated RCA outputs. Plug in the RCA cables to

your rear channel amplifier here.

6. Subwoofer Output: Gold plated RCA outputs. Plug in the RCA

cables to your subwoofer amplifier here.

7. Left and Right Gain Controls for the Main Source: Sets Left

and Right input gain to match the output level from the source unit.

8. Left and Right Gain Controls for the Aux Source: Sets Left

and Right input gain to match the output level from the source unit.

9. Back Light Switch: Push this switch to the right for amber

illumination, to the left for green illumination.

10. Subwoofer Crossover: Set the Crossover frequency for the sub

output with this switch.

7

1. Power LED: Green light indicates power ON.

2. Volume Control: Leave the source unit at 3/4 volume and use this

control as the master volume control.

3. Defeat Switch: With the switch in the "OUT" position, the equalizer

controls are bypassed. Use this switch to compare the sound with
and without equalization.

4. Auxiliary Switch: With the switch in the "OUT" position, the

Main Input is selected. With the switch in the "IN" position, you are
using the input from an auxiliary source.

5. Fader: Controls the output level to front and rear.

6. Sub Level: Independent level control for subwoofer output.

7. Sub Frequency: Selects the equalization frequency (40-120Hz) to

boost or cut.

8. Sub: Subwoofer band (40-120Hz) boost/cut control.

9. Low: Low band (250Hz) boost/cut control.

10. Low-Mid: Low Midrange band (500Hz) boost/cut control.

11. High-Mid: High Midrange band (2kHz) boost/cut control.

12. Treble: Treble band (10kHz) boost/cut control.

8

SYSTEM GAIN ADJUSTMENT

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.

Adjust the Main and Auxiliary gain controls separately, using the
following procedure:

1. Turn the PPI-EQP Volume control to 1/2 of maximum.

2. Turn the PPI-EQP and amplifier gain controls fully counterclockwise.

3. Turn source unit volume 1/2 to 3/4 of maximum output.

4. Play a CD or cassette. A loud music selection is desired.

5. Adjust the Left and Right gain controls clockwise until you hear the

music sounding distorted. ( If you can’t hear any music at this point,
turn up the gain control on your amplifier until the music is at a
comfortable listening level.)

6. When you hear distortion in the music, turn the PPI-EQP gain

controls back down slightly until the distortion goes away.

Adjusting amplifier input gains:

1. Adjust gains to minimum sensitivity (fully counterclockwise on the

gain control of a PPI amplifier.)

2. Turn the volume knob on the PPI-EQP to the 3 o’clock position.

3. Increase the gain on the amplifier until the onset of audible distortion.

4. Repeat step 3 for any remaining amplifiers in the system.

NOTE: In many multi-amplifier systems, the gain of some amplifiers may
need to be further decreased to achieve tonal balance.

9

The PPI-EQP Equalizer/Preamp puts an incredible amount of control at
your fingertips. Correctly adjusted, it can solve many of the problems you will
encounter along your road to perfect sound.

For best results, it is important to understand how the EQP controls affect
the sound of your system. On the front of your EQP four controls marked
LOW, LOW MID, HIGH MID, and TREBLE. These are the Boost/Cut controls
that increase or decrease the level of certain frequencies. As you can see
from the chart below, each control actually affects a group of frequencies
around each ‘center frequency’.

The SUB band works the same way, but with an extra twist. Not only can
you boost and cut the frequency, but you can also choose which frequency
to boost or cut. The control marked SUB FREQ is used to select the center
frequency anywhere from 40Hz to 120Hz, and the SUB control does the
boost/cut. This type of equalization is generally called ‘parametric’
equalization. To get a feel for the parametric SUB band, try boosting the sub
control, and then move the SUB FREQ control from 40Hz to 120Hz as the
music is playing.

10

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12

This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state. PrecisionPower, Inc. (PPI) 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: PPI will either repair or replace at no charge, to the
original purchaser, any unit which PPI’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 PPI. This warranty
is not transferable.

2. Non-Authorized Dealer Installed Products: PPI will either repair or replace at no charge, to the
original purchaser, any unit which PPI’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 PPI. 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 PPI 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 PPI product found to have the original factory serial
number removed or defaced. All products received (by PPI) 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 PPI 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 PPI’s owner’s
manual. Nor shall this warranty apply to any part which has been subject to misuse, neglect, or
accident.

6. PPI 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
RESULTING 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 PPI product should occur, contact
your Authorized Dealer for assistance with the return and factory repair of your PPI 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 PPI PRODUCTS OUT OF WARRANTY: 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 PPI Customer Service at 1-800-62-POWER for questions
concerning out of warranty repair charges. Repaired unit will be returned with
an itemized statement, C.O.D.