
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
Installation
Before You Begin..
Disconnect Battery ....................................... .3
Supplies and Tools Needed ......................... .3
Location and Mounting.. ............................... .4
Routing Wires.. ............................................. .4
Wiring
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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..m....... 3
.....................................
...................................... .3
............................................. 5
3
Speaker Wiring Options ............................ .7
Indicators and Controls.. ........................... .9
Control Panel Access ................................... .9
Power/Protect Light.. ..................................... 9
Level ............................................................. .9
Bass ............................................................ 10
2CH / 3CH / 4CH
Crossover (X-OVER) ..................................
Testing
Reconnect Battery
Test Power Wiring
Test Speaker Connections .......................... 11
Troubleshooting ...........................
Specifications
Warranty
.........................................
...................................... 14
........................................
......................................
.......................................
.............................. 13
10
11
11
11
11
12

JXP680
Features
JXP Series 4-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
Before You Begin
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
Before you begin, always
disconnect the battery
negative terminal.
Supplies and Tools Needed
l
Cordless drill with assortment of bits
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)

JXP680
Location and Mounting
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,
Routing Wires
Battery
Fuse or
Circuit
Breaker
1 r
Receiver
-- RCA Cables
-
Power Antenna,
Turn-on Wire
(18 gauge wire)
1
‘Power Wire
- laraer)
Grommet
power wire
(8
gauge
wire or
’ 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
Power Terminal (+lZV)
Connect directly to the vehicle battery+
terminal with 8 gauge wire (minimum).
Fuse:
JXP680 50 AMP
~~~+~
Terminal I
Adapter
Install as close
to the battery
as possible /
Terminal
/
,$,,ze
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”
Remote Terminal (REM)
Connect the power antenna/amplifier turn-on
lead from the receiver to the AMPLIFIER
REMOTE terminal.
Antenna Lead
GND REM +12”
To Receiver
Power
Wire
Fuses
25A 25A
Use only blade-type fuses.
Fuse:
JXP680 2 X 25 AMP
Drill :/8” hole
in chassis
sheet metal
5