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Jensen PS1220M - User Manual

Jensen PS1220M
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PS1220M
Contents
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Indicators and Controls. . . . . . . . . . . . . . . . . . . . . .8
Remote Level Control. . . . . . . . . . . . . . . . . . . . . . .8
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Audiovox Electronics Corporation
150 Marcus Boulevard
Hauppauge, NY 11788
1-800-323-4815
www.jensen.com
© 2004 Audiovox
v.030204
Introduction
Thank you for purchasing a Jensen amplifier. PS series amplifiers offer extreme value and performance. Proper installation
is essential for optimal performance and long-term reliability. Please read through this manual 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 need to return
the unit for any reason, always include the receipt with the product.
Installation Assistance
For installation assistance, call 1-800-323-4815 during normal business hours, or visit www.jensen.com at any time.
Features
State-Variable crossover design for precision frequency adjustment
12dB/octave Butterworth alignment
40Hz – 200Hz crossover frequency range
iX² Bass with continuously variable 0dB to +18dB bass boost centered at 45Hz
Input level control with a 300mV to 8V input range
High level inputs for interfacing with OEM/factory head units
Full range pre-amp output for installation flexibility
Dual status LED diagnostic indicator
Thermal, short circuit and low impedance protection circuitry
Unregulated Pulse Width Modulated (PWM) power supply for extended dynamic range
Balanced driver circuitry and complementary output stage design for low distortion and unparalleled stability
High current output stage easily drives 2 ohm loads
Amplifier
Installation
&
Operation
Manual
R

Questions and Answers

  • R
    Russell JenkinsJul 28, 2025
    Why is my Jensen Car Amplifier producing distorted sound?
    • H
      harrellstephanieJul 28, 2025
      If your Jensen Car Amplifier is producing distorted sound, the input level control might be set too high. Try readjusting the input level.
  • R
    Robert MatthewsAug 2, 2025
    What to do if my Jensen PS1220M Car Amplifier keeps blowing fuses?
    • W
      Wendy RichmondAug 2, 2025
      If your Jensen Car Amplifier blows fuses, it could be due to power wires connected backwards. Ensure the power wires are correctly connected. Alternatively, there might be an internal problem with the amplifier, requiring professional service.
  • D
    Donna BarkerAug 6, 2025
    How to fix a Jensen Car Amplifier that does not turn on?
    • J
      Jose OliverAug 6, 2025
      If your Jensen Car Amplifier isn't turning on, it could be due to several reasons. First, check the fuse(s) for the +12V terminal. Next, verify the head unit fuse(s) and wiring for the REM terminal. Also, inspect the main fuse at the battery and the fuse at the amplifier; replace them if blown, identifying the cause of failure. Lastly, ensure the main power ground is securely connected to a bare metal chassis.
  • E
    Elizabeth EllisonAug 10, 2025
    How to eliminate engine noise in Jensen PS1220M Car Amplifier?
    • J
      Jessica ShieldsAug 11, 2025
      If you are experiencing engine noise or alternator whine with your Jensen Car Amplifier, it could be due to several factors. Try using good quality shielded RCA cables to address potential ground loops. Ensure the amplifier and head unit are grounded to a clean, bare metal chassis. Reroute RCA and speaker wires away from factory harnesses to avoid inductive coupling. Lastly, check if the input level on the amplifier is set too high and readjust it if necessary.
  • S
    Sarah MitchellAug 15, 2025
    Why is short circuit protection activated on my Jensen PS1220M Car Amplifier?
    • E
      Elizabeth DaviesAug 15, 2025
      If the short circuit protection is activated on your Jensen Car Amplifier, check all speakers. Also, inspect the speaker wires for any shorts to ground and check for a defective crossover.
  • K
    Kenneth NelsonAug 19, 2025
    What causes low impedance protection to activate on Jensen PS1220M?
    • T
      tmooreSep 12, 2025
      If the low impedance protection is activated on your Jensen Car Amplifier, check the speaker connections to ensure the amp is connected to a proper load. Verify that the speakers are connected correctly, noting that the amplifier cannot drive a 1 ohm mono load (2 ohm minimum in mono configuration). Also, check the speakers themselves for defects and inspect the crossovers.
  • A
    austin54Aug 23, 2025
    Why is the volume control too sensitive on my Jensen Car Amplifier?
    • J
      Jacqueline SheltonAug 23, 2025
      If the volume control on your Jensen Car Amplifier is too sensitive, the input level control may be adjusted too high. Try readjusting the input level.

Summary

Introduction

Features

Installation

Supplies and Tools Needed

Lists necessary tools and materials for amplifier installation.

Location and Mounting

Guidance on selecting and securing a suitable mounting location for the amplifier.

Routing Wires

Instructions and diagrams for proper wire routing during installation.

Wiring

Power Wiring

Details on connecting the main power supply to the amplifier.

Replacement Fuses

Information on using the correct type of fuses for replacement.

Speaker Wiring

Diagrams illustrating how to connect speakers to the amplifier.

Pass-Thru RCA Outputs

Explanation of using RCA outputs to connect multiple amplifiers.

Input Wiring

Details on connecting audio sources via RCA or high-level inputs.

Indicators and Controls

Status Indicators

Covers power, protect, thermal, and overload/short circuit indicators.

Audio Controls

Explains level, bass boost, LPF, and remote bass control adjustments.

Testing

Reconnect Battery

Step to reconnect the battery after wiring is complete.

Test Power Wiring

Procedure to verify power connections are correct.

Test Speaker Connections

Steps to confirm speaker wiring is properly connected.

Troubleshooting

Specifications

CEA Power Ratings

Technical power output specifications according to CEA standards.

General Specifications

Other technical details like frequency response and input sensitivity.

12-Month Limited Warranty

Details of the product warranty coverage and terms.

Jensen PS1220M Specifications

General IconGeneral
Channels2
RMS Power @ 2 Ohms200W x 2
Bridged RMS Power @ 4 Ohms400W x 1
Crossover Frequency50Hz - 250Hz
Input Sensitivity200mV - 6V
Signal to Noise Ratio90dB
THD at Rated Power0.1%
Bass Boost0 - 18dB
CrossoverLow-Pass/High-Pass

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