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The Super Zen amp and REL subwoofer: humming noise (Read 2125 times)
Alex P.
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Posts: 17
The Super Zen amp and REL subwoofer: humming noise
09/10/20 at 00:00:11
 
Hi,

Is anyone successfully running The Super Zen Triode amp with a REL amplifier using High Level inputs?

I follow REL's the instructions on connecting high-level cables (3 colored wires) to the speaker terminals of the amp, but when I turn on the subwoofer power I get a lot of humming noise. Their advice not to connect the black cable did not help and they are not familiar with the amp to further troubleshoot.

Any advice? Tx.
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Geno
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Without music, life
would be a mistake.

Posts: 1988
Re: The Super Zen amp and REL subwoofer: humming noise
Reply #1 - 09/10/20 at 00:08:20
 
I had exactly the same issue. Run a piece of speaker cable between the two negative speaker connections on the zen. I originally did this on Steve’s advice because I could not get rid of the hum. Worked like a charm!
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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222
Crown sub amp
Cambridge Audio CXN(ModWright) • ZBIT
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart • Darlington Labs MP-7
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in open baffles
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Alex P.
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Posts: 17
Re: The Super Zen amp and REL subwoofer: humming noise
Reply #2 - 09/10/20 at 02:43:03
 
Brilliant! So to confirm, you bridge the L and the R negative terminals at the amp, right? Does that affect actual speaker sound at all?
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Geno
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Without music, life
would be a mistake.

Posts: 1988
Re: The Super Zen amp and REL subwoofer: humming noise
Reply #3 - 09/10/20 at 03:09:28
 
No effect on the speaker performance at all. I ended up with a piece of wire about 7” long with a banana plug on each side so I could just plug into the top of each negative terminal.

Like you, I had several conversations with REL techs trying to troubleshoot the hum problem. Ultimately it was Steve that came up with the solution.
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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222
Crown sub amp
Cambridge Audio CXN(ModWright) • ZBIT
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart • Darlington Labs MP-7
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in open baffles
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Alex P.
Verified Member
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Posts: 17
Re: The Super Zen amp and REL subwoofer: humming noise
Reply #4 - 09/10/20 at 04:26:35
 
It worked! So happy with the result.
It took the genius of Steve to solve this puzzle.
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