Question about Infinity Reference 7541a Car Audio Amplifier

1 Answer

INFINITY AMP PROTECTION LIGHT FLASHING

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

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 14 Answers

Overload maybe. If the amp is run at an improper impedence, the amp will shut down. If you are "CLIPPING" speakers / subwoofers the light will blink to indicate a hard clip . Example: 4ohm/2ohm stable amp with 4 ohm subs wired at 1 ohm.

Posted on Jan 29, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

When power gets put to the amp the protection, power and clip lights start flashing and the amp puts out zero power


Check the impedance of the speaker set up. Reasons for going in to protection mode is that amp can't handle the impedance... Just incase you don't know what impedance means, it is another way of saying ohms!

Sep 18, 2010 | Infinity Car Amplifiers

1 Answer

My infinity reference 7540a amp cuts in and out with heavy bass when the ''loud'' feature is on. I redid my ground, remote wire, shortened my power cable, and double checked all speaker connections. I dont...


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
(rare but worth a look if you think u have elimanted most other things Had a dude come to me when i was working in sydney with this problem )

also could be things like clipping protection , overheat protection ,amp drawing to much current from the alternator

do your lights dim when you hit the bass notes ?

get back to me and im sure we could solve this problem

Jan 22, 2010 | Infinity Reference 7541a Car Audio...

2 Answers

Infinity 1211a @ 2 Ohms


Hello monkey_flea, Your subs will share the amp output. And if you are not careful, you'll end up blowing them. The amp puts out 1300 watts RMS at 2ohms, the subs have an RMS power range of from 75-350 watts, and you'll be driving them with 650 watts each. A better power match would be to series the subs to present an 8ohm final load. This will reduce the output power to a level the subs can handle. Or you could buy 2 more 12.1's and connect them series-parallel for a 4ohm load and each sub would still be getting 325 watts RMS, just about the maximum they are rated to handle. Hope this helps.

Jun 03, 2009 | Infinity Reference 1211a Car Audio...

1 Answer

Sound loss


bad system cofiguration too much load on rea amp

May 11, 2009 | Infinity 475A Car Audio Amplifier

1 Answer

Amp is shutting off after 10 min of driving!! please help!!


Does it happen at all volume levels?
What is the gain setting on the sub amp?
Have you checked for 12V @ remote turn on after problem occurs?
Sounds as if the remote turn on relay inside the amplifier is losing signal, or has become damaged. If the protection light does not light up, the problem is not thermal, shorting, or high/low voltage.
The amplifier is in need of repair. This is not an end-user fix. Looking at about $50 to repair.

Thanks for using FixYa- a FixYa rating is appreciated!!

Feb 18, 2009 | Profile BAJA HA700M Car Audio Amplifier

1 Answer

INFINITY AMP PROTECTION LIGHT FLASHING FOR 5 SECONDS


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.

Jan 28, 2009 | Infinity Reference 7541a Car Audio...

1 Answer

Component speaker not working


The easiest thing to test is to try swapping the connections of the front component speakers at the amp connections. If the problem follows the speakers, the issue is probably with the speakers. I would triple check (again) the speaker wire connections. It's also possible the crossover for the driver side component speakers has an issue (thus why the tweeter worked for a while).

If the problem stays on the drivers side, the issue is probably with that channel on the amp. Triple check the RCA connections for that channel.

It's much easier to test other speakers on an amp channel versus trying to check it with a meter.

If the driver's door is "abused" often, my initial thought is the wiring at the speaker or the wiring in the speaker (to voice coil, within the crossover, etc) is the most likely culprit.

Apr 10, 2008 | Infinity 475A Car Audio Amplifier

1 Answer

Amp Issues


1) Make sure a bridged load of no less than 4 ohms is applied.
2) make sure both the left & right channels are working.

Jan 29, 2008 | Rockford Fosgate Punch P2002 Car Audio...

3 Answers

Problems with Infinity Amp 611A


are you running a large ground wire directly to the battery negative terminal?

Jun 03, 2007 | Infinity Reference 611a Car Audio...

5 Answers

Protect light flashing/ticking


this problem sound like you have too low of power going to your amp, test your battery and make sure its putting out enough power for at least the mininum amount of power that your amp requires, you can find that information in your manual or sometimes they post it on the amp itself. i hope this info helps

Oct 08, 2006 | Infinity Reference 1211a Car Audio...

Not finding what you are looking for?
Infinity Reference 7541a Car Audio Amplifier Logo

670 people viewed this question

Ask a Question

Usually answered in minutes!

Top Infinity Car Amplifiers Experts

xxxxxx xxx

Level 3 Expert

4706 Answers

Tygh Duval
Tygh Duval

Level 2 Expert

290 Answers

Radames Pagan
Radames Pagan

Level 3 Expert

196 Answers

Are you an Infinity Car Amplifier Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...