Question about Infinity 7540A Car Audio Amplifier

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Can you help me with Infinity REF-5760A

Hallo dears can you help me with Infinity REF-5760A, It seems to me that I did wrong connections....

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  • Daniel Jenkins
    Daniel Jenkins May 11, 2010

    you need to provdie more information, there is no way any o us can help you with that vague of a question.

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  • 35 Answers

Ok positve on amp straight to battery
negitive to ground on car or battery
remote wire to back of head unit
and rcas in head unit to amp

Posted on Sep 05, 2008

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3 Answers

Another conundrum


To check for yourself, get an Ohmmeter and see if the outers of the amplifiers RCAs are connected to the ground or each other. If so then it cannot take speaker signals directly.
I suspect the 'High Level' the manual speaks of are the 4volt auxilliary audio signals that can be found on some newer head units, not speaker signals.
Speaker level signals from a bridge amp CAN be used on grounded RCA inputs if the signal is first passed through a simple decoupler and attenuator.
Diagram to explain....
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Nov 22, 2007 | Infinity 475A Car Audio Amplifier

1 Answer

How do I hook up my infinity 1600a at 2ohms with 2 4ohm speakers?


Placing the speakers next to each other face down, you will notice that the connection points run in sequence +- and +-. Now connect the - (negative) from the one speaker, to the + (positive) of the other speaker. Now connect the open + from the one speaker and the open - from the other speaker to your amp. Your amp should have a bridging indication. On the connection points of the amp, you should see a mark pointing to the first + and the last -. That will be your bridge and thus utilizing the full potential of your amplifier

May 21, 2010 | Infinity Reference 1600a Car Audio...

1 Answer

I have an Infinity 530a 5 channel amp. new


May be the problem is on the sound you are using is not a 5 channel coded sound or check in the menu´s of the amp if the rear channel´s have sufficient db output, check the connections, check if you amp. is not working only as simple stereo (menus also)

Hope this helps

Jun 24, 2009 | Infinity Car Amplifiers

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

Protect mode on 475a


Yes if your wires are to small they dont supply enough power to the amp and it will shut down..Also the ground..Check all connections for tightness and that none of the wires are touching or grounding out...Hope this helps you and have a great day

Apr 02, 2009 | Infinity 475A 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

Both Positive and Negative Speaker Wires Mixed With Truck On


WHEN U CROSSED THE WIRES U POPED A WIRE LEAD LOSE, CHECK ALL YOUR CONNECTIONS.

GOOD LUCK

Dec 12, 2008 | Infinity 475A Car Audio Amplifier

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

2 Answers

POssibly Blown amp? Please help


disconnect all power cables.make a short between terminals G&P G&R then try amp without any speakers connected.

Jan 06, 2007 | Infinity Reference 7541a Car Audio...

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