Precision Power PAR-245 Manual de usuario
CONTENTS
(click on a topic to view)
Congratulations SystemTuning
Features and Specifications SystemTuning
Mounting Frequency Distribution
Mounting Frequency / Q Selection Code
Wiring Frequency / Q Selection Code
Wiring System One
Functions SystemTwo
Functions SystemThree
SystemTuning Troubleshooting
SystemTuning Block Diagram
SystemTuning Warranty
PAR 245 5 Band Equalizer / Preamp OWNERS MANUAL POWER CLASS
TM
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 deliverAbsolutely State of theArtTM 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.....
BACKTO CONTENTS
Signal-to-Noise Ratio 110 dB
Total Harmonic Distortion (1 kHz, 1 VRMS) 0.002%
Boost/Cut Range
±
15 dB
Equalizer Center Frequencies and Q Values:
Band Frequency Q Value
Sub (30 - 66 Hz) 2.0 - 3.0
Low (90 - 300 Hz) 3.0 - 5.5
Low-Mid (430 - 900 Hz) 2.5 - 4.5
High-Mid (950 Hz - 4.6 kHz) 2.5 - 6.0
Treble (6 - 16 kHz) 1.3 - 3.3
Maximum Input Voltage (Flat) 10 VRMS
Maximum Output (10 k
Ω
Load) 10 VRMS
Frequency Response 3 to 100 kHz
Supply Voltage 9 - 15 VDC
Dimensions 4.60" L
6.75" W
0.95" H
FEATURES / SPECIFICATIONS
1
5 Band Parametric Equalizer
Preamp Line Driver
Choice of 16 Selectable Frequency/Q
Settings for Each Band
Front and Rear Outputs with Fader Control
Dual Selectable Illumination
Center-Detented Boost/Cut Controls
±15 dB Boost/Cut for Each Band
Defeat Switch
Gold-plated RCA Input and Output Connectors
PWM (Pulse Width Modulated) Power Supply
Independent L & R Input Gain Adjustments
Input Clip Indicator
Designed and Handcrafted in the U.S.A.
BACKTO CONTENTS
Specifications
Mounting
To prevent damage to the
PAR-245
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
PAR-245
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
Oncealocationhasbeenchosen,securelymountthe
PAR-245
using
the two supplied brackets. There are two different sets of brackets
included with your
PAR-245
. One set is used to flush mount the
PAR-
245
, as shown above. The other set is used to surface mount, as
shownonthenext page.Thebracketsareconnectedtotheequalizer/
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.
BACKTO CONTENTS
MOUNTING
3
In-Clip
+
++++
RLRL
RL
In-Clip
+
++++
RLRL
RL
In-Clip
RLRL
RL
Dimensions
6.75"W
4.60" L
0.95"H
BACKTO CONTENTS
NOTE
4
WIRING
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
1234
876
5
PPI MAR KET ING DPT
Trk1
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."
Reconnectthenegativeterminalonlyafterall connections have
been made.
BACKTO CONTENTS
5
The next step is to connect the Power, Ground, and Remote wires to
your
PAR-245
.The power wire should run from the mounting location
through the vehicle to the battery or power distribution block. Avoid
sharpcorners, creases, and sharp bodyparts.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
holeinthemiddleofthisarea. BeCareful! Inspecttheareaunderneath
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
suggestcrimpingand/orsolderingthisconnection.Aftertheconnection
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
amplifierremote) lead of the head
unit. This wire supplies a 12 volt
signal to the
PAR-245
when the
main system is activated.
Once you have routed the power,
ground,andremotewiresthrough
the vehicle, it is time to connect the wires to the
PAR-245
. 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
PAR-245
.
Remote
Ground Powe
r
T/O B+
Powerlock
WIRING
BACKTO CONTENTS
6
FUNCTIONS
1. InputGold plated RCA inputs. Plug in the RCA cables from the source unit
here.
2. Rear Output
Gold plated RCA outputs. Plug in the RCA cables to your rear channel
amplifier here.
3. Front Output
Gold plated RCA outputs. Plug in the RCA cables to your front channel
amplifier here.
4. LED Select
Push this switch IN for Red Illumination, Leave it OUT for Green.
5. Power
After connecting the Power, Ground and Remote wires, plug in the
PowerLock
connector here.
6, 7. Left and Right Input Sensitivity
Sets Left and Right input gain to match the output level from the
source unit. (See Page 8)
8. Frequency Adjust
Set the Frequency/Q combination for each band with these
switches. See the Frequency/Q Selection Codes on pages 14 and 15.
BACKTO CONTENTS
7
FUNCTIONS
+
++++
123 4 5 109
876
1. Power LED
Red light indicates power on.
2. Input Clip
Input-Clip indicator lights when the PAR-245 is overdriven. With the
source unit at 3/4 full volume, adjust the input sensitivity so that the light
blinks only on very loud material.
3.Volume
Leave the source unit at 3/4 full volume, and use this control as the
Master volume control.
4. FaderControls the output level to Front and Rear.
5. 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.
6. Sub Subwoofer band (30 Hz - 66 Hz) Boost/Cut control.
7. Low Low band (90 Hz - 300 Hz) Boost/Cut control.
8. Low-Mid
Low Midrange band (430 Hz - 900 Hz) Boost/Cut control.
9. High-Mid
High Midrange band (960 Hz - 4.6 kHz) Boost/Cut control.
10.Treble
Treble band (6 kHz - 16 kHz) Boost/Cut control.
BACKTO CONTENTS
Inordertoachievemaximum signal-to-noise performance from
a high quality auto stereo system, it is desirable to use high
signallevelswhereverpossibleintheinterconnectcables. 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
PAR-245
input:
1. Turn
PAR-245
volume control fully counterclockwise.
2. Turn source unit volume 1/2 to 3/4 of maximum.
3. Adjust all
PAR-245
input gains fully counterclockwise.
4. PlayaCDorcassette.Aloudmusic selection is desired.
5. Adjust the left input gain control clockwise until the
input clip LED lights. Then adjust the control
counterclockwiseslightly until theLEDdoesn'tlight.This
setting will minimize system background noise and
prevents overloading the
PAR-245
.
6. Repeat Step 5 for the right input gain control.
There are separate left and right gain adjustments
for each input which allows left/right balance
adjustments.
Adjusting amplifier input gains:
1. Adjust gains to minimum sensitivity (fully
counterclockwiseon the gain control ofa
PPI
amplifier.)
2. Turn the volume knob on the
PAR-245
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.
System Gain Adjustment
8
SYSTEM TUNING
BACKTO CONTENTS
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