Theremini noisy speaker

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bigmeister
Posts: 2
Joined: Wed Jul 26, 2017 11:16 am

Theremini noisy speaker

Post by bigmeister » Wed Jul 26, 2017 11:22 am

Hi everyone. Very new (<24 hours) owner of Theremini. It's working great, except I notice the built in speaker is constantly emitting a warbling sound, like some kind of RF interference. Not very loud, but certainly noticeable. Very similar to putting an AM radio next to a computer, for example. The level doesn't change regardless of the volume pot position, but the speaker is silenced when headphones are plugged into the front panel socket. The headphones and line outs are completely clean by the way. Do they all do this, or have I got a dud?

Thanks - Robin

Thereminimouse
Posts: 4
Joined: Tue Jun 19, 2018 11:41 pm

Re: Theremini noisy speaker

Post by Thereminimouse » Tue Jun 19, 2018 11:47 pm

I have exactly the same problem. As there was no reply to this question I assume I too have a dud.

bigmeister
Posts: 2
Joined: Wed Jul 26, 2017 11:16 am

Re: Theremini noisy speaker

Post by bigmeister » Wed Jun 20, 2018 7:50 am

I never got to the bottom of this. I returned the Theremini to the retailer, who agreed it was noisy, and changed it for something completely different. I didn’t really get on with it.

Thereminimouse
Posts: 4
Joined: Tue Jun 19, 2018 11:41 pm

Re: Theremini noisy speaker

Post by Thereminimouse » Thu Jun 21, 2018 5:38 am

bigmeister wrote:I never got to the bottom of this. I returned the Theremini to the retailer, who agreed it was noisy, and changed it for something completely different. I didn’t really get on with it.
Thank you for the reply. I too am at the exchange or refund stage with a product that I otherwise really love. I can play it after just a couple of hours practice.

Anyone on this forum who has a Theremini - be it with or without a noisy speaker - please let me know. :lol:

nekomono
Posts: 1
Joined: Wed Jul 25, 2018 2:42 am

Re: Theremini noisy speaker

Post by nekomono » Wed Jul 25, 2018 2:46 am

Hello, I'm new here and also new in the theremin world. I've recently bought a theremini and I LOVE it. however, I also recognized on the first day that the speaker makes a weird noise, even when I mute the theremini. Playing it with headphones or a speaker seems to be fine, so the speaker is the problem. I think I have to contact the retailer and ask for an exchange

philt
Posts: 1
Joined: Fri Nov 11, 2022 12:45 pm

Re: Theremini noisy speaker

Post by philt » Fri Nov 11, 2022 12:54 pm

I know it's an old thread but did this problem ever get fixed?
My new one (2022) has a similar warble. Tried various things suggested by tech support but the only 'cure' I found was to run it from a 12v gel battery - the background noise completely disappears.
If they're all like this, there's no point sending it back for an exchange.

Don23805
Posts: 5
Joined: Sat Mar 04, 2023 4:07 pm

Re: Theremini noisy speaker

Post by Don23805 » Sat Mar 04, 2023 4:30 pm

If the noise problem goes away by running it on a battery (pure DC), then it sounds like a power supply problem.

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