Precision Power EQ-31 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 war-
ranty 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.
Stereo/Mono 1/3 Octave Equalizer
30 Center Controls with ±12dB gain
Balanced Differential Input Stage
Input Attenuation Switch
Mono/Stereo Switch
Defeat Switch
Gold RCA input and output connectors
PWM Power Supply
Designed and Handcrafted in the USA
Signal-to-Noise Ratio >102dB
Total Harmonic Distortion (1KHz, 1VRMS) 0.017%
Boost/Cut Range ±12dB
Maximum Input Voltage (EQ Defeated) 4Vrms
Maximum Output Voltage 8Vrms
Supply Voltage 11-15 VDC
Frequency Centers 25Hz, 31.5Hz, 40Hz, 50Hz, 63Hz,
80Hz, 100Hz, 126Hz, 156Hz,
200Hz, 250Hz, 320Hz, 400Hz,
500Hz, 635Hz, 800Hz, 1KHz,
1.27KHz, 1.6KHz, 2KHz, 2.5KHz,
3.2KHz, 4KHz, 5KHz, 6.4KHz, 8KHz,
10KHz, 12.8KHz, 16KHz, 20KHz
Dimensions 7.500”L
7.875”W
1.000”H
1
2
To prevent damage to the equalizer 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 include the
trunk and passenger compartment (floor or under seat). Never mount the
equalizer in a location that would subject it to immersion or exposure to water.
Once a location has been chosen, securely mount the
PPI-EQ-31
with four
mounting screws. Be Careful! Inspect the area underneath to be sure you are
not drilling into wires, brake or fuel lines, etc. that could be damaged by the
drill bit or screws.
Holes for mounting screws
3
80Hz
63Hz
40Hz
31.5Hz
320Hz156Hz 635Hz
250Hz126Hz 500Hz
50Hz25Hz 200Hz 100Hz 400Hz
10KHz
8KHz
1.27Hz 2.5KHz 5KHz
2KHz1KHz 4KHz
20KHz
16KHz
6.4KHz800Hz 1.6KHz 3.2KHz 12.8KHz
GND
REM
+12V
OUTPUT
L
R
INPUT
LR
-12db
MONO
DEFEAT
PPI•EQ31
1/3 octave crossover
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.
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