Question about Car Audio & Video
Hi, I own a lightning audio B300.4 amplifier, it is hooked to battery with 8g power cable and grounded to boot with same. Remote cable from headunit is hooked up. All of these cables are in the right places and nothing else is connected to it. The red protect light is on, and if i connect any speakers to it there is no sound due to the protect light being on. The fuses are fine, any ideas?
The most likely reason for it to go into protect is shorted output transistors.
Posted on Jan 16, 2008
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Posted on Jan 02, 2017
sounds like amp is grounded. use a multimeter with ohms and test from pos to neg, should be o.l if there is any reading or resistance there the amp is grounded and junk
Posted on Feb 21, 2010
Tips for a great answer:
May 21, 2011 | Lightning Audio B2.300.4 Car Audio...
Should the amplifier go into protect mode, simply disconnect all RCA and speaker leads, while keeping +12 volt, power ground and remote leads connected.
1. Now turn the amplifier back on, and if the diagnostic LED lights, the amplifier has an internal fault.
2. If not, plug the RCA cables back, and reset the amplifier. If it goes into diagnostic now, the fault lies in the input, either with bad cables or source unit.
3. If the amplifier seems fine with RCA cables plugged in, connect the speakers, one at a time, and if one of the speakers or its wiring is faulty, it will activate the diagnostic
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