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Jensen LXA300 manual

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Table of contents for the manual

  • Page 1

    How to Install and Operate the LXA300 Amplifier ® Contents T echnical Assistance For technical assistance with the operation or installation of the LXA300, call 1-800-323-0221. W elcome! What you're holding in your hands is no ordinary owner's manual. We've tried to make the instructions in this book clear and easy to follow . For y[...]

  • Page 2

    2 ® LXA300 Amplifier Location The LXA300 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 LXA300 with carpets or enclose it behind i[...]

  • Page 3

    3 ® LXA300 Supplies and T ools Needed Supplies: • Speaker wire (12 gauge for subwoofers, 16-18 gauge for other speakers) • Sheet metal type screws for mounting amplifier • Electrical tape • Solderless crimp connectors • 1/2" thick plywood or particle board to mount amplifier on T ools: • Flat and Phillips screwdrivers • Wire cut[...]

  • Page 4

    4 ® LXA300 Wiring Power and Outputs Remote T erminal (RMT +12V) Power T erminal (BA TT +12V) Connect directly to the vehicle battery+ terminal with 8 gauge wire (minimum). Ground T erminal (GND) Connect to a good chassis ground. The ground connection should be to clean, unpainted metal to provide a good electrical connection. Connect the radio pow[...]

  • Page 5

    5 ® LXA300 Inputs and Controls Input Wiring Important Use only the low level or high level input, do not use both at one time. Low Level Input Use a pair of shielded stereo audio cables with RCA type jacks. Most trunk-mount amplifier installations require 20-foot RCA cables. Most under-seat and pickup truck installations use 12-foot cables. Connec[...]

  • Page 6

    6 ® LXA300 Adjust the crossover to accommodate your chosen installation method. Use LPF and HPF to adjust from 50 to 250Hz. When using your Jensen amplifier to run a subwoofer and two full- range speakers (known as T ri- mode or three channel operation) you will need to purchase separate high and low pass crossovers from your local retailer . A pa[...]

  • Page 7

    7 ® LXA300 Speaker Wiring 2 Subwoofers 2 Speakers L + L – R – R + RCA Cables 2/4 Ω 2/4 Ω LPF FULL HPF X-OVER 2/4 Ω 2/4 Ω RCA Cables L + L – R – R + LPF FULL HPF X-OVER[...]

  • Page 8

    8 ® LXA300 Bridged Subwoofer 2 Speakers + Subwoofer Important When running a subwoofer and two full-range speakers together (T ri-mode operation), high and low pass filters must be used. Failure to install these filters will damage your amp and/ or speakers. RCA Cables 2/4 Ω 4 Ω 2/4 Ω L + L – R – R + Low Pass Filter (available at most ca[...]

  • Page 9

    9 ® LXA300 T est Power Wiring 1. T urn on the receiver but do not turn up the volume. The amplifier power light should come on. If not, check the RMT and +12V wires. 2. T urn up the receiver volume slightly . All speakers should operate. If not, check wiring connections at amplifier and speakers. ✓ T esting T est Speaker Connections These tests [...]

  • Page 10

    10 ® LXA300 Pr ofessional Tip Crimp Connections Purchase crimp connectors and crimping tool. Connectors are color coded. 1. Strip 1/4 inch (6mm) of insulation from both wires. 2. Insert into connector . 3. Crimp tightly . Y ou can make permanent splices (using butt connectors) or select connectors that can be removed and reinstalled. 3 2 1 Strip w[...]

  • Page 11

    11 ® LXA300 T r oubleshooting Problem Possible Cause Corrective Action Amplifier does not operate (power LED not on) when vehicle and radio are on Radio volume needs to be turned up too high for amp to work Radio volume is too sensitive Sound from only one speaker Sound distorted Blows fuses Alternator whine in outputs (vehicle ignition noise) Lou[...]

  • Page 12

    Specifications LXA300 Amplifier Power output @ 14.4 VDC, 20-20 kHz ............ (4 ohms) 75 Watts per channel RMS, < 00.08% THD (2 ohms) 100 W atts per channel RMS, < 00.1% THD (4 ohms) bridged 200 W atts per channel RMS, < 00.1% THD Frequency Response ........................................................................................[...]