YBA Integre, hum through speakers

A high-end amp like that shouldn't have any hum or hiss whatsoever.
It has to be fixable, and it could be as simple as dried-out electrolytics.
The challenge with remote-assistance however is finding a schematic diagram of it.
An oscilloscope is a useful instrument for actively locating the culprit.

 

I'm sorry but I'm not from around there, nor have I heard about any.

 

i could be a smart alec & say that it's only humming cause it doesn't know the words, but i won't! lol!

but seriously, there may be an earth loop, via another earthed signal source.

you could try unplugging the tuner, then the cd player, etc & see if the humming disappears.

resqueline is right about the electros - if their electrolyte dries out they won't be able to reduce the 100 (or 120) hertz ripple that is superimposed on the dc power supply line. i've had that problem before. you could look for any electros whose plastic covering has sort-of 'shrunk', or checking their temperature with your finger.

did you end up getting it fixed?

& what's YBA by the way?

 

It most likely means Yorkville Bass Amp. [I am associated with the company.]

 

computerlen, i saw the nice valve bass amps you were talking about. i'd love to have a couple o them myself! lol! hand-made ay - beautiful! gotta love that 2nd harmonic valve sound!

but it seems like aracu is talking about a really expensive (nearly $5k!) french-built amp by yves-bernard andre. wow! i've never seen an amp with NO wiring! - well, almost; maybe they've hidden it well.
but definitely one you'd get fixed rather than buyin a new one!

i wanna hear back from aracu as to what was wrong with it though!

 

YBA Integre hum problem

I just found the hum in my YBA Integre Sigma DT to be a bad 470uF 63V cap in the input circuit. Found it with a multimeter after I pulled the board up off the chassis mounts. Just checked all the caps for AC ripple voltage. Any cap reading higher ripple than other similar caps is suspect.

The most difficult part of the job is pulling up the PCB. It is wedged in pretty snug and volume pot will lift up with the board.

Good luck!