Hum in ARC Ref 3 not on 0 but 1-103 light buzz

Broederen, thanks for the update. Let me ask you a question, in your original post, you stated that the ARC Ref 3 "suddenly" started having these noise problems. Looking back, did these noise problems suddenly occur when you introduced the Kronzilla into the mix or started running the Kronzilla just as an amplifier?

I'm just trying to line up timeline's to figure out if you did in fact make an electrical change in your system that instigated this noise issue. It would seem strange that the Ref 3 was operating properly, then all of a sudden had problems. That's why I originally suggested that there was a electrical change made that initiated the noise.

Cheers,
John

John,
Good question.
But then again, I expect that from you! :-)
Good job to all.

Hello John,

Thanks for your reply,

I've contacted Marek Gencev from Kronzilla. He was very kind to reply me today (27 january)

The situation is getting to its climax. He made me aware of another change I overlooked. At the time I bought the Kronzilla I did not have a Cardas Golden Reference RCA interconnect. I used temporary a Cardas Golden reference XLR cable with Cardas adapters till I got my new Cardas GR RCA cable which I installed during the change in location.

At Marek's suggestion I put this cable back and the HUM looked gone...., but (in these types of situations there is always a but) the "pink noise" (still audible at 1 meter and independent from ARC pre-amp setting) , a part of the HUM was not gone. On this part Marek is still thinking because in another high-end set-up the ARC was dead quiet. But somehowe the Kronzilla SXI have still some "relationship" issues but improving..........

To be continued....

Cheers,

Broederen

There is no way that a change in cable will make that hum disappear. If you believe that, then I have a bridge to sell you here in San Francisco

I'm sorry Oneobgyn, it really works. I quote from the mail from Marek Gencev, chief designer at KRaudio (located in Prague)

Quote mail Marek to me,

start quote:

"I suppose you've told about the hum in speakers, i.e. some kind of 50Hz and its multiple frequencies added to signal way. In your case it is caused most probable by closed ground loop. The Kronzillas SX/SXI are devices with connected signal and chassis grounds. Because your preamplifier is also most probably same and not 'floating' device, the loop appears there. The reason, why SXi and SX has different result, is different topology of inner shielded cables. There are two solutions. You can try to feed your AudioRes. preamplifer through the power cord with disconnected ground terminal or you have to use symetrical cables and symetrical adapter on Kronzilla amplifier side."

stop quote.

It worked out for the HUM (the XLR cable with Cardas adapter on Kronzilla RCA amp input,lifting the ground on the ARC had no inluence) but not for the pink noise on which he later today has returend to me with the following:

start quote

"The preamplifier output stage is most probably too noisy and amplifier sensitivity too high (SXI has 0.75Vrms on all inputs, SX 1V). ""

stop quote

That is the situation till now. To be continued.........

Cheers,

Broederen