Question about Legacy 2CH 240W AMP Car Audio Amplifier

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Sound comes out one side only

Legacy II 240W unit. Sound only comes out one side. Other side comes out very faintly. Everything seems connected right. Wires are fine, speakers are good. This unit has hardly been used. I'm at a loss

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I have oneside sound problem i listen to other people but they did't listen to me.please slove my problem

Posted on Dec 25, 2008

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Have you checked the ballance and fade on the deck if your running 2 sets of r.c.a. cables. or if you are running one set of r.c.a cables and y's at the end you have them crossed. that sounds like a input signal problem

Posted on Mar 16, 2008

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1 Answer

Faint sounf from car speakers


Just a couple general ideas. If it is a used car then the head unit is possibly failing. Another possibility is resistance building up at the connections. If you can clean the connections, plugs and slipons with electronic spray, erasure, and fine sand paper if accesable.

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It seams like the amplifer is not working and you are right but it certanly needs to be measured first.

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How far away can the unit be from the magnetic contact strip?


Usually not much more than 1/2" Howver, if the room is very quiet you can usually move the magnet close to the body (or other magnet) and hear a very faint sound when the magnet makes and breaks the connections. This way you can test the distance and have a better idea of how far away it can be. You may need to get your ear right up to the units to hear the faint sound. Like a faint "twing" sound or "click" sound.

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Problem with legacy amp


I would check the RCA preamp wires connecting the stereo to the amp. If these are loose or broken, it could cause you to lose your sound.

Does the amp show signs of life, such as clicking on, an LED turns on, or anything like that?

Has anything else changed between the time it worked and didn't work?

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1 Answer

Loosing sound / distortion


If the sub channel is shutting down, there is a problem with that channel. The unit will shutdown to prevent further damage. This unit will need to see a service bench to determine the defective part(s).
Dan

Mar 17, 2008 | Audio Players & Recorders

1 Answer

Optimum sound performance needed


1) legacy products are highly overrated and i have never seen one put out the power it claims
2) if you are running the amp bridged, you need to match the impedance of the speakers to the amps highest output impedance, otherwise your system will not sound all that great...

what size fuse or fuses does your amp use? what size wire did you install with (power and ground)? did you connect direct to battery or did you connect to a fuse block or similar? did you use a stiffening capacitor? does it sound like it is clipping when you turn it up or is it just distorted? what kind of box are you using for the speakers (ported, vented, sealed, bandpass)?

if you give me the model number of your speakers and your amplifier i can probably help you more, but with the information you have provided, this is all i can offer..

hope it helps,
trin

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1 Answer

No power


Check the unit for any Fuses, Fusable Links etc, if they are OK proceede on to testing, I often troubleshoot these issues via a stereo head set, modify the leads so you can "Touch" them onto the Speakers Output Terminals, connect the "Shields" together, thats "Earth" and the other Two, are Left & Right... with a Sinal feed in & the Amp's volume turned to about 25% volume, connect up the Earth wires to the Chassis with a clip, under a srew etc, just make good contact... then touch the Left & right wires onto the output, ya should hear sound... if not most probably the Output device(s) may have gone faulty.

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Power problem


Do you actually see a fuse in it? If there is a fuse it should typically say on it what the rating is.

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My Emerson NR305TT will not produce sound. Turn table works, CD Player works, FM Tuner Works, everything works except no sound comes from the unit. The on switch and volume seem to work as I hear a faint...


You have one of 3 problems:1) bad solder joints in the amplifier or preamp section 2)defective output transistors/ICs in the power amp or 3)missing or incorrect voltages to the amp section. If the unit has a headphone jack plug in a headset. If you have sound then everything is OK thru the preamp section and your problem is in the power amp. Any competent repair shop should be able to solve this one easily.

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