Jensen JXP680 Owner's manual

JXP680
JENSEN
Amplifier lnstalla tion and Operation
Introduction
Thank you for purchasing a Jensen amplifier. The JXP series
amplifiers offer extreme value and performance. Proper
installation is essential for optimal performance and long-term
reliability. Please read through this manual first to familiarize
yourself with your amplifier and its functions.
Warranty Service
If your Jensen amplifier should ever require service, you will
need to have the original dated receipt. If you ever need to
return the unit for any reason, always include the receipt with the
product.
/nstallation Assistance
1.800.323.0221
www.jensen.com

JENSEN
Contents
JXP680
Features .................................m....... 3
Installation ..................................... 3
Before You Begin.. ...................................... .3
Disconnect Battery ....................................... .3
Supplies and Tools Needed ..........................3
Location and Mounting.. ................................4
Routing Wires.. ............................................. .4
Wiring ............................................. 5
Power.. ......................................................... .5
Power Terminal (+12V) ................................ .5
Ground Terminal (GND) ............................... .5
Remote Terminal (REM) ............................... 5
Fuses ........................................................... .5
Inputs, RCA Output.. .................................. .6
Input Wiring ................................................... 6
Connecting Other Amps ................................ 6
Speaker Wiring Options ............................ .7
Indicators and Controls.. ............................9
Control Panel Access ................................... .9
Power/Protect Light.. ..................................... 9
Level ............................................................. .9
Bass ............................................................ 10
2CH / 3CH / 4CH ........................................ 10
Crossover (X-OVER) .................................. 11
Testing ......................................... 11
Reconnect Battery ...................................... 11
Test Power Wiring ....................................... 11
Test Speaker Connections .......................... 11
Troubleshooting ........................... 12
Specifications .............................. 13
Warranty ...................................... 14

JXP680
Features
JXP Series4-channel amplifiers include:
l Easy access top mounted controls
0 Continuously variable high pass/low pass
crossover
* 40Hz - 400Hz crossover frequency range
0 Crossover mode selector switch
0 Continuously variable bass boost, centered
at 45Hz
0 Input level control
l Traditional input circuitry - low and high level
inputs
l Pre-amp output for installation flexibility
l Dual status LED diagnostic indicator
l Thermal, short circuit and low impedance
protection circuitry
l PWM MOSFET power supply
l Discrete amplifier design with complementary
high current Bi-polar output stage
Installation
l Flat and Phillips screwdrivers
l Wire cutters/strippers
l Crimping tool
l 12-volt test light or digital multimeter
l Wire brush, sandpaper or scraping tool
(ground connection to vehicle should be a
clean, unpainted metal surface)
Before You Begin
Supplies and Tools Needed
Before you begin, you will need tools, supplies
and adapters. It is best to make sure you have
everything you need before you start.
Disconnect Battery
l Cordless drill with assortment of bits
Before you begin, always
disconnect the battery
negative terminal.

JXP680
Location and Mounting Routing Wires
The JXP amplifier’s compact design allows
greater flexibility in mounting. It can be
mounted under a seat or in the trunk.
When selecting a location, remember that
amplifiers generate heat. Select a location
where air can circulate around the amplifier.
Do not cover the amplifier with carpets or
enclose it behind interior trim panels. Do not
mount the amplifier in an inverted or upside
down configuration. Every installation will be
a bit different based upon vehicle design.
Check all locations and placements carefully
before making any cuts or connections.
Allow air circulation around the amplifier,
Battery
Fuse or
Circuit
Breaker
1
Grommet
1 r
Receiver power wire
-- RCA Cables Power Antenna, ‘Power Wire
Turn-on Wire
(8 gauge
(18 gauge wire) wire or
- - laraer)
’ Ground Screw
Drill 118”hole in
chassis sheet metal
Use the same ground if
using multiple amplifiers
lmportan t
If wiring connections are made wrong, the unit
will not operate properly and it could be
damaged. Follow the installation instructions
carefully, or have the installation handled by
an experienced technician.
4

JXP680
Wiring
Power
JENSEN
Connect directly to the vehicle battery+
terminal with 8 gauge wire (minimum).
Fuse:
JXP680 50 AMP
Power Terminal (+lZV) Remote Terminal (REM)
~~~+~ ,$,,ze
Install as close
Terminal I Terminal
Adapter to the battery /
as possible /
Ground Terminal (GND)
Connect to a good chassis ground. The ground
connection should be to clean, unpainted metal
to provide a good electrical connection.
GND REM+12”
Drill :/8” hole
in chassis
sheet metal
Connect the power antenna/amplifier turn-on
lead from the receiver to the AMPLIFIER
REMOTE terminal. GND REM+12”
To Receiver
Power
Antenna Lead
Wire
Fuses
25A 25A
Use only blade-type fuses.
Fuse:
JXP680 2 X 25 AMP
5

JXP680
Speaker Wiring Options
4 Speakers
REAR
HPF
FULL
LPF 0
R
2R
minimum
2 SubwooferslBridged Mono
REAR
HPF
FULL
IPF 0
El
FRONT
HPF
FULL
LPF 0
El
40 4R
minimum minimum
2 Speakers t Bridged Subwoofer
REAR
HPF
FULL
LPF
FRONT
HPF
FULL
LPF
40
minimum

JXP680
Tri.Mode
2Q = 20 minimum
4fi = 4R minimum
Important
When running a subwoofer and two
full-range speakers together (Tn’-
mode operation), high and low pass
filters must be used. Failure to install
these filters may damage your amp
and/or speakers.
Freq. Speaker Impedance
HZ
2 OHMS
4 OHMS
8 OHMS
L C L C L C
80 4.1 mH 1OOOyF 8.2mH 5OOpF 15mH 25OlF
100 3.1 mH 8OOyF 6.2mH 4OOpF 12mH 2OOpF
130 2.4mH 6OOuF 4.7mH 3OOuF -~1OmH 15OuF
8

JXP680
JENSEN
Indicators and Controls
Control Panel Access
1. Turn thumbscrew counterclockwise to
remove.
2. Gently push down on thumbscrew to lift the
front edge of the control door.
3 Lift and remove control door.
Note:
An optional Allen-head screw (with wrench) is
included and can be used in place of the
thumb screw.
Power/Protect Light
POWER
0
A dual status LED indicator illuminates
PROTECT
red or green to indicate the status of
the amplifier.
Green - Power applied, ON
Red - Protection circuit activated, STANDBY
Level
LEVEL
2 4
0
The input level control matches the
output of your radio to the input of
the amplifier. After the installation
8” 3” is complete, make sure the input
2 1
0
level control on the amp is turned
down all the way (counterclockwise
or all the way to the left). Play a
8” 3”
LEVEL tape or CD (make sure bass and
treble settings or EQ are flat too)
and turn the volume up slowly until
you just start to hear distortion. Now back
the volume down just a bit. On the amp,
slowly turn up the input level control
(clockwise or to the right) until you just start
to hear distortion and back it down a bit.
Now your radio and amplifier levels are
matched.
9

JXP680
Bass
BASS
3 5
0
BASS increases the volume of the
bass at 45Hz by up to 12 db.
Use very carefully!
“OS1268
2CH / 3CH / 4CH
The JXP680 can be configured for three different input modes: 4 channel, 3 channel or 2 channel.
4 Channel When the input selector is set
4CH
c
R
to 4CH, the amplifier will
3CH
2CH
operate as a standard 4
channel amp with all RCA
inputs connected.
3 Channel When the input selector is set
to 3CH, the amplifier is
configured for stereo/mono
operation. The front channels of
the amplifier operate in stereo
mode. The rear channels of the
amplifier are internally bridged
for mono operation. In 3CH the
following RCA inputs will be
used:
-
-
2 Channel When the input selector is set
4CH
n to 2CH, the amplifier is
3CH R
configured for bridged stereo
2CH
operation. The amplifier will
need a two channel input even
though there are four inputs. In
2CH the following RCA inputs
will be used:
Note
Although the above illustrations indicate ,the
low level input being used, the same
connections would apply to the high level
input.
High Input
10

JXP680
Crossover (X-OVER)
Adjust the crossover to accommodate your
chosen installation method.
l LPF-(tow pass filter) Select
this filter when the amplifier will
be driving woofers or
subwoofers.
l FULL-Crossover is not active,
amplifier is in “full range”
mode.
l HPF-(high pass filter) Select
this filter when the amplifier will
be driving full range/separate
speakers, and you want to limit
the “bass” going to these
speakers.
Tri-mode/Three channel operation
R-CHX L-CHX An amplifier is usually
e” 6a configured for tri-mode
operation when you
lOHi*oaii lOHI100HZ
want to use one
SD 6. amplifier to drive a pair
of front speakers and
subwoofer( In other
4OHi4OOHZdOHilOOHiwords, when you want
R~CHX L-CHX drive a complete system
with one amp. Your
Jensen amplifier is capable of tri-mode
operation.
Important
Tri-mode operation requires using ‘passive
crossovers”. These crossovers are available
at your local retailer or install shop. Failure
to install these filters may damage your
amplifier and/or your speakers.
See Page 8.
Testing
Before you finish the installation, you should do the following tests to make sure the wiring is correct
and everything is operating properly.
Reconnect Battery Test Speaker Connections
These tests make sure the speakers are
connected right. If speakers don’t play at all,
one (or both) speaker wires may be
disconnected. If the wrong speaker plays (you
hear left speaker when you expect right
speaker) make sure you connected the wires
Test Power Wiring
and +I 2V wires.
2. Turn up the receiver volume slightly. All
speakers should operate. If not, check
wiring connections at amplifier and
11

JENSEN
JXP680
Troubleshooting
Problem
3adio volume needs to be
;r;oykup too hrghfor amp
3adio volume is too sensitive
Soundfrom only one speaker
Sounddistorted
310~sfuses
fngine noise
I nition noise/static or
Afernator whine)
‘rotect light comes on/
amplifiershuts down
Jo output on channels
-
Possible Cause
No power to +12V terminal Corrective Action Repair wire or connections.
Nopower to remote wire with
radroon Check connections to radio with test light.
Fuse blown 1 Check fuse
Input level control adjusted too low 1 Adjust input level control.
Input level control adjusted too high I ” Adjust input level control to lower setting
Defective speaker Replace speaker.
Poorconnections to soeaker (wire) 1 Check connections.
RCA input cable defective
input level control adjusted too high
Replace cable.
Adjust input level control.
Speaker wires shorting together 1 Separate speaker wires and insulate.
Powerwires hooked up incorrectly 1 Check power wire connections.
Speakers blown or defective
Improper ground connections
Ground loop(s)
Check speakers.
Reroute RCA away from main power wires.
Reroute RCA cable.
Make sure amp is grounded to a clean, solid part of
the chassis/frame.
Amp is inthermal protection Let amp cool down before attempting to turn back on
(some rnstallationsmay require a fan to keep the amp
cool, especially if you are driving subwoofers with the
amp).
Faulty speaker connection and/or Check speakers and/or crossovers for loose or bad
crossover connectrons.
Low battery voltage Make sure you are gettin between 10.8-l 5.6 volts to the
amplifier with a digital mutrmeter measured at the amplifier.9,
Speaker im edance less than 2 ohms
per channe
P Ifyou are using 4 ohm s than two speakers wired?
eakers you cannot have more
Inparallel per channel.
Amp will not operate into 2 ohms bridged.
Speaker wires not connected to
speakers properly Refer to pages 6 - 8 for proper installation
Input hooked up incorrectly I
12

JXP680
JENSEN
Specifications
JXP660 4-Channel Amplifier
Frequency Response ....................................................................................... 20 Hz-20 kHz + 0.5 dB
Signal to Noise Ratio @ Rated Power.. .................................................................................. >lOO dB
Channel Separation @ Ref. Power............................................................................... >65 dB, 1 kHz
THD & IMD @ Ref. Power into 2 ohms ..................................................................................... ~0.8%
Speaker Impedance.. ............................................................................................................ 2-8 ohms
Input impedance ................................................................................................................. 47 k ohms
Bass Boost Center Frequency .................................................................................................... .45Hz
Crossover.. .................................................................................................. 12 dB/octave, Butterworth
Power Requirement .................................................................. 14.4 VDC (10.8-l 5.6 VDC allowable)
Power output @ 14.4 VDC, 20-20 kHz
(4 ohms) ........................................................................ 60 Watts per channel RMS, < 0.5% THD
(2 ohms) ........................................................................ 85 Watts per channel RMS, -Z0.8% THD
(4 ohms) bridged ......................................................... 170 Watts per channel RMS, < 0.8% THD
Dimensions .................................................... .2.56” x 11.125” x 10.125” (65mm x 283mm x 257mm)
Specifications subject to change without notice.

I i.
Limited One Year Warrantym
USA and Canada
Length of Warranty. This warranty from Recoton Mobile
Electronics shall be in effect for a period of one year from
the date of the first consumer purchase.
Persons Protected. This warranty will be enforceable by
the original owner during the warranty period so long as
proof of date of purchase from an authorized Jensen dealer
is presented whenever warranty service is required.
What is Covered. Except as otherwise specified below,
this warranty covers all defects in material and
workmanship in this product. The following are not covered:
damage resulting from accident, misuse, abuse, neglect,
product modification, improper installation, incorrect line
voltage, unauthorized repair or failure to follow instructions
supplied with the product; damage occurring during
shipment (claims must be presented to the carrier);
elimination of car static
or other electrical interferences; any product purchased
outside USA or Canada, or on which the serial number
has been defaced, modified or removed.
How You Can Get Service.
U.S. Purchasers. Please telephone Jensen at
l-800-323-481 5. We will either inform you of the name
and address of an authorized Jensen repair station which
will service the product or will advise you to send the
product to a factory service center.
Canadian Purchasers. The product should be returned
to the Jensen dealer from whom it was purchased and
such dealer either will service or arrange for service of
the product.
If shipment of the product is required, it should be packed
securely. The original dated bill of sale must always be
included with the product as proof of warranty coverage.
What We Will Pay For. We will pay for all labor and
material expenses required to repair the product, but you
must pay any labor costs for the removal and/or installation
of the product. If the product is shipped for warranty
service, you must prepay the initial shipping charges, but
Jensen will pay the return shipping charges if the product is
returned to an address inside the USA or Canada.
Exclusion of Certain Damages. Jensen’s liability is
limited to the repair or replacement, at our option, of any
defective product and shall not include incidental or
consequential economic damages of any kind.
Some states and/or provinces do not allow limitations on
how long an implied warranty lasts and/or do not allow the
exclusion or limitation of incidental or consequential
damages, so the above limitations and exclusions may not
apply to you.
This warranty gives you specific legal rights, and you may
also have other rights which vary from state to state and
province to province.
JENSEN
Recoton Mobile Electronics, Inc.
1090 Emma Oaks Trail
Lake Mary, Florida 32746
02002 Recoton Audio Corporation
www.jensen.com

Pleasesendothercorrespondenceto:
Jensen
CustomerService
2950LakeEmmaRoad
LakeMary,FL 32746
or calll-800-323-4815
ELEO19820
ERJOl-01
JENSEN
P 0 BOX 17468
DENVER CO 80217-0468
II,,I,II ,,,,,I,I,,,Ill,,,lll11,,l,,l,ll,1l1IlIIlIIII
Post Office will
P/easefold here.