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AUDIO FORUMS >> General Discussion and Support >> The Super Zen amp and REL subwoofer: humming noise
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Message started by Alex P. on 09/10/20 at 00:00:11

Title: The Super Zen amp and REL subwoofer: humming noise
Post by Alex P. on 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.

Title: Re: The Super Zen amp and REL subwoofer: humming noise
Post by Geno on 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!

Title: Re: The Super Zen amp and REL subwoofer: humming noise
Post by Alex P. on 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?

Title: Re: The Super Zen amp and REL subwoofer: humming noise
Post by Geno on 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.

Title: Re: The Super Zen amp and REL subwoofer: humming noise
Post by Alex P. on 09/10/20 at 04:26:35

It worked! So happy with the result.
It took the genius of Steve to solve this puzzle.