Klipsch KA1000 ultra II amp is humming

[Tomys]

I've just got this THX ultra 2 and I noticed the Amp is humbling [:'(] .Can anyone please help. how to fit it.. what's wrong with it ?

Many thanksss

Cheersss

[wuzzzer]

I'm assuming you mean humming, because if I ever have an amp that's humbling me I usually try and show it who's boss.

Amp humming can be the result of a ground loop. Try and plug it in a different outlet and see if it helps. Sometimes moving cords around can help too.

[kelA]

Is it humming through the system (subs) or can you hear a hum coming from inside the amp casing?

[Tomys]

Thanks all for your help..

@ WUZZER I tried in different outlets, but the hum is still there..

@ keIA The hum is coming from inside the Amp casing ...

[Daddy Dee]

a hum from the amplifier (and not going through the speakers) is a mechanical hum.

I've heard his when a transformer wasn't quite right, or aging. depending on he problem, tightening to the chassis could help. I've wondered if there is a way to damp the vibration in a helpful way, but since they sometimes get hot, tha's a problem.

Klipsch tech support would be a good opion. It may just need to be sent in for service, but they can advise you approriately on that.

[colterphoto1]

It could be the bolt holding the torridial transformer (the big round doughnut thingie in the middle). That's what I've been told- mine hums too so I should do this fix. MAKE SURE TO UNPLUG and don't touch any connections, particularly the ends of any big capacitors.

[TNRabbit]

If the amp is humming, you must TEACH IT THE WORDS or you'll never get anywhere~ [H]

[djk]

Most toroids make mechanical hum when there is only a few mV of DC off-set on the AC power.

The Crown method is the simplest way to go. Only one bridge rectifier is needed for amps less than 1KW.