Question about Infinity Reference 7541a Car Audio Amplifier

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INFINITY AMP PROTECTION LIGHT FLASHING FOR 5 SECONDS

I have this problem,my infinity amp lost power to the sub this morning and has worked a few times since, but the protection light is on now. it stays on for 5 seconds, goes off, then on again for 5 seconds continuously like that. if i disconnect the speaker cables for the sub, the amp clicks.

i have the power going to a power cap, then to 2x amps(1 for front speakers and the problem one for the sub) so it cant be the main power cable.if there was no power,the light wouldnt be on right? the earth is the same place as the working amp,using the same bolt into the cars metal.same remote turn on cable too. im stumped!

it's happened before, but with no assistance, started working again!

this suggest a loose wire internally?

thanks in advance for any help

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I have an Infinity amp as well, and I was having the same issue for a time. The amp is protecting itself from some sort of overload. It could be the Ohms load on the sub, but I would guess not. Make sure your low pass filter is set to LP and not HP or Flat. Then check the RMS on your subs and match that to the Amp RMS. Once I did all that I found that everything worked fine, for a time. It started doing this again, and I checked the fuse and it was blown badly. It seems that the fuse setup on some of these Infinity amps is not as good as one would hope, because the charge was bridging the gap and frying out my fuses. It was like a spark would jump from one side of the fuse to the other without travelling the fuse itself, and this was causing my protect issues. I pulled the fuse, got a new one of the same rating, but I placed the fuse in with a little piece of rubber in between the 2 contacts, and then connected to the fuse block. I have not had problems since.

Posted on Feb 02, 2009

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sounds like ur gains are set to high and is going into protect mode

also what ive seen happen before is the speakers (if mounted in metal shelf or door and arnt bolted down correctly can flex under bass notes and flex the speaker that much the termanls short onto the metal and amp hits protect mode
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