Question about Infinity Reference 7541a Car Audio Amplifier

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Channel not working

The back rear channel has never worked. Putting a multimeter to it showed almost no power coming through. Do I need a new amp, or is there a way to fix it?

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Get it repaired by a car audio shop, if its expensive get a new amp.

Posted on Dec 13, 2008

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Amps turn off and cut out


You just gotta get your gains set up right. Look Up "How To Set your Gains with a Multimeter" your over powering your subs or speakers and your amplifiers cant keep up. you also have to make sure your speakers are wired to the right ohms. your amp cant handle. if your amp cant handle, for Example:1 Ohms your gonna blow your amps. ......Speakers and subs are a science too.

Dec 27, 2012 | Kicker 10DX5001 Car Amp

2 Answers

We have an old amplifier from back in the 80's and 90's. Its 500watts, the right channels (both main and sides) work fine and loud, but the left channels produce very low sound. I checked the fuse and its...


Have you checked the final transistors on that weak channel? They may look fine but may be weak. You can pull them and check them on your multimeter with the diode check and cross it with the data sheet for that transistor.

Mar 07, 2011 | Kenwood KAC-5204 350 Watt Max Power Stereo...

1 Answer

I have a Technics SU-V460 integrated amplifier, and the left channel (speaker) keeps "dropping" out . I have to turn the volume right up in order for it to "kick" back in. Would this be...


There are three possible problems with your system. The first, and cheapest to fix, is that the wire connecting the left channel is faulty. To test this, unplug the wire from the back of the amp and put a new one in, then play some music BEFORE putting everything back into it's respective place. If the speaker doesn't cut out anymore, problem solved! Speaker wire is very cheap too. If the problem persists, try connecting one of your other speakers that you know works to the input. If that speaker cuts out as well, then the amplifier is the faulty component. That will cost some money to repair (between $50-$150 depending on where you go, excluding the price of a new amplifier). If the speaker you know is not faulty works when plugged into the left channel, then the only other option is that the original left channel speaker is faulty. This could cost between $25-$100 to get repaired, excluding the cost of a new speaker. It will not be as costly as a new amp, but will definitely cost more than a new speaker cable.

Mar 03, 2011 | Car Amplifiers

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

1 Answer

The amp is only putting out on 1 channel


I do believe this is caused by one of your amp fuses. Depending on which + on the amp is being used. That channel has a blown fuse. have you tried running + and -, + and - to both channels to see if both subs worked? If one sub doesn't then it's a blown fuse or scarred fuse and needs to be changed.

Feb 10, 2009 | Kenwood Excelon KAC-X521 Car Audio...

1 Answer

Amp quit putting out sound


It is probably in the "protect" mode. When this happens, the amp will have power going to it and seem to be turned on, but no sound. Many amplifiers have a LED that is normally red and it lights up when in the protect mode. Check all the LED's on the amp and see if one of them is for the protect mode.

When an amplifier goes into protect there are usually only 2 reasons for it.

1. A bad speaker

2. A channel blown inside the amp.

Disconnect the speakers to the amplifier and see if it makes the amp come out of protect mode. If the amp has an LED to indicate when it is in the protect mode, this LED will shut off, and sometimes they have a relay inside the amp that you will hear click. If you hear the click sound form inside the amp after you disconnect the speakers, you probably have a bad speaker. Take yours to a service center and ask them to check them for you, many shops will do this for free, I know that my shop will do it for free, so I assume that many others will also.

If the amplifier has a blown channel, you need it serviced. There is no quick fix for a blown channel. If you have a multimeter I can tell you how to check some of the components inside to verify if it has a blown channel. Let me know if you are able to do this and I will give you instructions on how to properly test the components. If you do not have a multimeter, there is really no way to figure out what components are bad. Your only choice would be to take it to a service center for repair. They can give you an estimate of what it may cost before you are committed to paying for a repair. Most car amplifiers will cost about $100 to $150 to repair a blown channel. It just depends on how much damage there is, and the rates of the service center.

I hope this is helpful, and if so a good rating would be appreciated. If you need to communicate more with me to determain what the problem is, please wait to give a rating until we are finished. That way I will not get an undeserved bad rating. By the way, the only rating that is good (meaning that it doesn't lower my over-all rating) is a FixYa! rating. The "Helpful" and lower just bring my rating down. After all, the only reason for offering this free help, is to get a good rating.

Dave

Nov 18, 2008 | Jl Audio 500/5 Car Audio Amplifier

1 Answer

QSC 2450 Power amplifier


i have a pyle pro 1000 watt max 2 channel mono and 2 channel stereo and when i get that thing loud the little red light cums on basically what i mean is that the amp on channel one is cooked i myself i wouldn't even use it y cause more damage

Apr 03, 2008 | QSC RMX-2450 Car Audio Amplifier

1 Answer

Trouble shooting XM-1652Z Amp


Grab yourself a test light and make sure that not only the 12v red power wire is putting out power but the thin blue or 12 volt turn on wire is also showing power. Then test the ground terminal and make sure u have a good ground. If that doesnt work try checking the amps fuses and check the fuse and connection on the battery. If everything checks out ok and the problem persists then put a small test speaker to the channel outputs and make sure that u are getting noise from those channels if you dont get any noise then u most likely have bad outputs and blown channels, you will need a new amp. Good luck, hope i was good help.

Jan 26, 2008 | Sony Xplod XM-1652Z Car Audio Amplifier

1 Answer

I do not hear any music through my 10" M Audio Subs (M Audio Sound System)


If you know how to use a multimeter, you can test the amp this way:

-unhook the subs
-hook up a cheapie speaker you know for sure works to one of the channels
-unhook the audio inputs
-turn the amp on
-set your meter to VDC
-put the positive probe on the inside of the input connector, being sure you make contact with th inner contact
-take the negative probe and tap it on the outside of the connector

What you are doing is sending a low voltage (replicating an audio signal) into the amp audio circuit and allowing the amp to amplify it. If the amp makes the speaker pop each time you strike the probe, the amp is working.

You mentioned you need a 4 channel amplifier make the two, dual voice coil subs operate. The is not true and by hooking them up like that, there's a chance of damaging the subs. The reason is that the dual voice coils are interwoven and they have to get electrically identical signals or they fight against each other. The can mechanically fail, then, electrically fail, then even damage the amp too.

Nov 21, 2007 | Nakamichi PA-504 Car Audio Amplifier

1 Answer

Left Channel Not Working


Hello fakeman_56, You may have blown the power output amplifier on the left channel. This is what this looks like. You will have to take some measurments to determine if the output power amplifier is indeed malfunctioning. I hope this helps, Thank you, shuttle83,

Oct 06, 2007 | Philips GEMINI XG-2001 Fan...

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