Page 1
CONTENTS
(click on a topic to view)
Congratulations Functions
Features and Specifications Input
Mounting Troubleshooting
Mounting Frequency Chart
Wiring 3 Way System Design
Wiring Block Diagram
Functions Warranty
FRX322 Electronic Crossover 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
3-Way Active Crossover
12dB/octave Slopes
Low Pass Level Control
Input Attenuation Switch
Detented Frequency Selection Controls
Gold RCA Input and Output Connectors
Po werLock
Power, Ground and Remote Connector
PWM Power Supply
Designed and Handcrafted in the USA
Specifications
Signal-to-Noise Ratio >102dB
Total Harmonic Distortion (1KHz, 1VRMS) 0.002%
Input Impedance 10 kΩ
Maximum Output (10 kΩ Load) 8 VRMS
Supply Voltage 11-15 VDC
Crossover Slopes 12 dB/octave
Crossover Frequencies:
Low Pass 40Hz to 500Hz
Front High Pass 40Hz to 5kHz
Rear High Pass 40Hz to 500Hz
Dimensions 6.813" W
0.995" H
3.805" D
FEATURES / SPECIFICATIONS
1
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Page 4
2
Mounting
To prevent damage to the
FRX-322
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
FRX-322
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.
MOUNTING
Once a location has been chosen, securely mount the
FRX-322
using
the two supplied brackets. There are two different sets of brackets
included with your
FRX-322
. One set is used to flush mount the
FRX-
322
, as shown above. The other set is used to 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
Dimensions
6.813"W
0.995"H
3.805"D
R
L
R
L
R
L
R
L
R
L
Precision
Power
FRX-322
Made in USA
Output
Low Pass
Input
Front
Input
Rear
High Pass Out
Front
High Pass Out
Rear
Power
High Pass Freq.
250
500
40
40050
300100
Rear
High Pass Freq.
X 10
250
500
40
40050
300100
Front
Front/Rear
Input Connect
Low Pass Level
0dB
+10
- ∞
+7 -20
+5 -10
Low Pass Freq.
250
500
40
40050
300100
Power
FRX-322
Attenuation
-12dB in
Secure the bracket
to the FRX-322
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 FRX-322.
Adjustable slots
for screws
Bracket can be reversed
for installer's individual needs.
We suggest securing to
surface with a #6 metal screw.
R
L
R
L
R
L
R
L
R
L
Precision
Power
FRX-322
Made in USA
Output
Low Pass
Input
Front
Input
Rear
High Pass Out
Front
High Pass Out
Rear
Power
High Pass Freq.
250
500
40
40050
300100
Rear
High Pass Freq.X 10
250
500
40
40050
300100
Front
Front/Rear
Input Connect
Low Pass Level
0dB
+10
- ∞
+7 -20
+5 -10
Low Pass Freq.
250
500
40
40050
300100
Power
FRX-322
Attenuation
-12dB in
R
L
R
L
R
L
R
L
R
L
Precision
Power
FRX-322
Made in USA
Output
Low Pass
Input
Front
Input
Rear
High Pass Out
Front
High Pass Out
Rear
Power
High Pass Freq.
250
500
40
40050
300100
Rear
High Pass Freq.X 10
250
500
40
40050
300100
Front
Front/Rear
Input Connect
Low Pass Level
0dB
+10
- ∞
+7 -20
+5 -10
Low Pass Freq.
250
500
40
40050
300100
Power
FRX-322
Attenuation
-12dB in
Adjustable slots
for screws
Surface mounting
bracket.
Adjustable slots
for screws
Secure the bracket
to the FRX-322
with the two 6-32x1/4"
screws provided.
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Page 6
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.
NOTE
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
+ R
F
eject
VOLUME
BASS
TREBLE
RIGHT
LEFT
BALANCE
TRACK
REVERSE
FOWARD
123
4
876
5
PPI
MARKET
INGDPT
Trk 1
Power distribution block.
Firmly attach Ground
Wires to solid metal.
+ + +
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Page 7
5
The next step is to connect the Power , Ground, and Remote wires to
your
FRX-322
. 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 crossover 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
FRX-322
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
FRX-322
. 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
FRX-322
.
WIRING
Remote
Ground
Powe
r
Quick Disconnect
T/O
B+
Powerlock
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Page 8
6
FUNCTIONS
1. Power
After connecting the Power, Ground and Remote wires, plug in the
PowerLock
connector here.
2. Low Pass Output
Plug the RCA cables from the FRX to the Low Pass amplifier inputs.
3. Front Input
Plug the RCA cables from the front channel output of the headunit to the
FRX Front Input RCAs.
4. Rear Input
Plug the RCA cables from the rear channel output of the headunit to the
FRX Rear Input RCAs.
5. Front High Pass Out
Plug the RCA cables from the FRX to the Front High Pass
amplifier inputs.
6. Rear High Pass Out
Plug the RCA cables from the FRX to the Rear High Pass
amplifier inputs.
R
L
R
L
R
L
R
L
R
L
Precision
Power
FRX-322
Made in USA
Output
Low Pass
Input
Front
Input
Rear
High Pass Out
Front
High Pass Out
Rear
Power
1 2 3 4 5 6
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Page 9
7
FUNCTIONS
1. Power LED
Red light indicates power on.
2. Low Pass Frequency
Used to set the Low Pass Frequency (40 Hz - 500 Hz)
3. Low Pass Level
Low Pass Level can cut or boost the Low Pass Frequency (-∞ to +10dB)
4. Front/Rear Input Connect
Push this switch IN to connect front and rear channels together
when using one input.
5. Attenuation -12dB in
Push this switch IN for attenuation if the line level is over 6 volts.
6. X10
Push this switch IN to multiply the Front High Pass frequency
range by 10.
7. Front High Pass Frequency
Used to set the Front High Pass Frequency (40 Hz - 5 kHz)
8. Rear High Pass Frequency
Used to set the Rear High Pass Frequency (40 Hz - 500 Hz)
High Pass Freq.
250
500
40
40050
300100
Rear
High Pass Freq.
X 10
250
500
40
40050
300100
Front
Front/Rear
Input Connect
Low Pass Level
0dB
+10
- ∞
+7 -20
+5 -10
Low Pass Freq.
250
500
40
40050
300100
Power
FRX-322
Attenuation
-12dB in
1
2 3
7 8
4 5 6
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Page 10
8
INPUT
To use Speaker Level Inputs (common ground headunits only),
connect RCA plugs to the front or rear speaker leads as shown,
and push IN the Attenuation switch.
WARNING:
If you are using a source unit with bridged high
powered (or "floating ground") speaker outputs, a suitable high to
low level adapter must be used. If you are unsure about your head
unit see your local PPI dealer or call
1-800-62POWER
.
(+) Positive
(-) Negative
LEFT input
(+) Positive
(-) Negative
RIGHT inpu
t
eject
VOLUME
BASS
TREBLE
RIGHT
LEFT
BALANCE
TRACK
REVERSE
FOWARD
123
4
876
5
PPI
MAR KET
ING DPT
Trk 1
SOURCE Headunit
R
L
R
L
R
L
R
L
R
L
Precision
Power
FRX-322
Made in USA
Output
Low Pass
Input
Front
Input
Rear
High Pass Out
Front
High Pass Out
Rear
Power
High Pass Freq.
250
500
40
40050
300100
Rear
High Pass Freq.
X 10
250
500
40
40050
300100
Front
Front/Rear
Input Connect
Low Pass Level
0dB
+10
- ∞
+7 -20
+5 -10
Low Pass Freq.
250
500
40
40050
300100
Power
FRX-322
Attenuation
-12dB in
Push In to attenuate the input.
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Page 11
9
TROUBLE SHOOTING
ANY SOUND NOW?
SOUND IN ONE CHANNEL ONLY
Reverse left and right RCA outputs for one band (i.e. subwoofers).
SOUND IS NOW IN
OPPOSITE CHANNEL
Reverse RCA inputs
SOUND IS NOW IN
OPPOSITE CHANNEL
Reverse RCAs at head unit
(Check Balance control)
SAME CHANNEL
Problem is in the Crossover. 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
NO
Check Power and Remote turn-on wire
for voltage. Make sure Ground wire is
secure.
SAME CHANNEL
Problem is in the amplifier, speakers or
associated wiring of the silent channel.
YES
Check Input cables for signal by
connecting them straight to the
Subwoofer amplifier
NO SOUND
YES
Problem is in the Crossover. See your
local Authorized
PrecisionPo wer
Dealer
or call1-800-62
POWER
.
NO
Problem is elsewhere in the system.
Check head unit and amplifiers.
LOW OUTPUT FROM ONE BAND
Check gain control on the affected amplifier(s).
STILL LOW OUTPUT - See your local Authorized
PrecisionPower
Dealer
or Call 1-800-62
POWER
.
Is the LED lit?
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Page 12
10
FREQUENCY CHART
1 40 Hz 40 Hz 420 Hz
2 46 Hz 40 Hz 420 Hz
3 46 Hz 40 Hz 420 Hz
4 47 Hz 40 Hz 420 Hz
5 48 Hz 42 Hz 428 Hz
6 51 Hz 44 Hz 460 Hz
7 54 Hz 46 Hz 484 Hz
8 58 Hz 50 Hz 524 Hz
9 62 Hz 52 Hz 556 Hz
10 67 Hz 58 Hz 604 Hz
1 1 73 Hz 62 Hz 652 Hz
12 80 Hz 68 Hz 708 Hz
13 89 Hz 74 Hz 812 Hz
14 99 Hz 84 Hz 876 Hz
15 1 14 Hz 94 Hz 1.00 KHz
16 131 Hz 110 Hz 1.19 KHz
17 147 Hz 124 Hz 1.34 KHz
18 159 Hz 136 Hz 1.44 KHz
19 167 Hz 142 Hz 1.50 KHz
20 173 Hz 148 Hz 1.56 KHz
21 182 Hz 156 Hz 1.58 KHz
22 192 Hz 166 Hz 1.72 KHz
23 202 Hz 174 Hz 1.86 KHz
24 214 Hz 184 Hz 1.93 KHz
25 226 Hz 196 Hz 2.05 KHz
26 240 Hz 208 Hz 2.18 KHz
27 256 Hz 222 Hz 2.36 KHz
28 276 Hz 240 Hz 2.52 KHz
29 298 Hz 258 Hz 2.72 KHz
30 320 Hz 282 Hz 2.96 KHz
31 350 Hz 306 Hz 3.22 KHz
32 378 Hz 334 Hz 3.54 KHz
33 414 Hz 368 Hz 3.86 KHz
34 440 Hz 394 Hz 4.13 KHz
35 460 Hz 410 Hz 4.32 KHz
36 480 Hz 430 Hz 4.51 KHz
37 500 Hz 450 Hz 4.72 KHz
38 514 Hz 456 Hz 4.83 KHz
39 526 Hz 468 Hz 4.91 KHz
40 530 Hz 468 Hz 4.92 KHz
41 530 Hz 500 Hz 5.00 KHz
Detent High Pass X10High PassLow Pass
All crossover frequency controls are detented. Each "click" counted
from the full counterclockwise position corresponds to a specific
frequency. Refer to this chart and page 6 for set-up instructions.
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Page 13
11
3-WAY SYSTEM DIAGRAM
Passive
Crossover
Passive
Crossover
Tweeter
Tweeter
MidRange
MidRange
Passive
Crossover
Passive
Crossover
Tweeter
Tweeter
MidRange
MidRange
POWER
CLASS™
Amplifier
Rear High Pass
Subwoofer
Subwoofer
POWER
CLASS™
Amplifier
Low Pass
FRX-322
Electronic Crossover
Rear OutputFront Output
Source Unit
POWER
CLASS™
Amplifier
Front High Pass
Rear High Pass Out
from FRX-322
Front High Pass Out from FRX-322
Low Pass Output from FRX-322
R
L
R
L
R
L
R
L
R
L
Precision
Power
FRX-322
Made in USA
Output
Low Pass
Input
Front
Input
Rear
High Pass Out
Front
High Pass Out
Rear
Power
High Pass Freq.
250
500
40
40050
300100
Rear
High Pass Freq.
X 10
250
500
40
40050
300100
Front
Front/Rear
Input Connect
Low Pass Level
0dB
+10
- ∞
+7 -20
+5 -10
Low Pass Freq.
250
500
40
40050
300100
Power
FRX-322
Attenuation
-12dB in
eject
VOLUME
BASS
TREBLE
RIGHT
LEFT
BALANCE
TRACK
REVERSE
FOWARD
123
4
876
5
PPI
MAR KET
ING DPT
Trk 1
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Page 14
12
BLOCK DIAGRAM
Sum
-12dB INPUT ATTENUATION
RCA
Rear Input
RCA
Front Input
Input
Combine
Switch
Low Pass
Level
Sub
Low Pass
40Hz - 500Hz
12dB / octave
Rear
High Pass
40Hz - 5kHz
12dB / octave
Rear High Pass
Low Pass
Front
High Pass
40Hz - 5kHz
12dB / octave
Front High Pass
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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:
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 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 W ARRANTY 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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