I have had this amp a few years now with no problems, now when i turn it moderately loud (over half way), its fine for 20 seconds then it cuts out, the red light above current drive also goes out. Only one speaker gets sound through it, the other does but very very quietly so to hear it at all you must put balance all the way to the left, then crank it, at which point it dies again. Any help would be fantastic as me this amp has done me proud in the past.
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Re: SU-V460 cuts out at high volumes
You need to check the amp for dry solder joints about the output stages. These amps are notorious for soldering going bad. I would set about re-soldering the entire output stage.
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I have the same TECHNICS SU A900 MKII as you are talking about and it always runs warm I think using 4R speakers instead of 8R speakers should solve the problem and actually I am thinking of switching to 4R as well.
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.
Use a multi meter,set it to 12v,turn system on use some bass.while music is playiing hold pos of multi meter to poss- neg to neg- on amp see what voltage is running at at what its dropping to it sounds more like a voltage drop problem.if you hooked it up back words u could fry unit..Have you done the big 3.what size is your alt,and what is your amps draw..
Sounds like you have a bad or dirty gain potentiometer. Try turning the gain up and down with the volume at a moderate level. If u hear static, it is possible the potentiometer is bad or dirty. Replace with one of the same value and see if that solves your problem.
Hi There, you need to eliminate all the connection and surplus items around the SUV-460 amplifier to determine if its the amp or not..
That is disconnect every thing then connect just the speakers and an input to the amp like a CD player or radio input. Then see if the amplifier plays OK thru the speakers on both channels and the balance control works fine....If it doesnt then the fault is inside the SUV-460 but if it all works fine than start reconnecting theemixer panel carefully and recheck all your cables and connections. Its a process of elimination to determine if its a "Box" fault or a cable fault...