radio interference through the tweeter??

[coldbru]

As per my earlier post, I brought home a pair of SCM110s. They're great. BUT -- they pick up AM radio (presumably) through the tweeter. Has anyone else experienced this? It's quite nuts.


- the noise persists whether there is an XLR cable connected to the speaker or not
- the noise persists with different power cables (factory cable, AQ Thunder)
- the noise persists with a ground cheater plug - ground removed
- the noise persists, but is substantially reduced, when plugged into an Audioquest Niagara 5000 instead of the wall

The outlets in question are 2 custom runs of 10-gauge romex, Audioquest Edison duplex outlets, run from my sub-panel (in a warehouse building with a central electrical room.

Assuming it might be noise on the ground line (one suggestion from the techs), why does it manifest itself so crazily audibly through this speaker? No other speaker has ever done this.. Focal SM9s, Focal Solo6, Adam A7X, etc.

[jophill]

Not from personal experience but on the previous incarnation of the ATC Forum I think there was a thread where something similar happened. There was a local radio transmitter causing interference. There were photographs of (IIRC) a successful fix.

In that case I think the local dealer came in and with factory approval (maintaining the guarantee) lined the enclosure behind the amp packs with metal foil to reduce direct radio frequency (RF) coupling to the amplifiers. IIRC this was successful but can anyone confirm that I remember this correctly?

If you are getting substantial reduction from the RF filter in the Audioquest but some interference remains, then perhaps some direct coupling as above may be what's left. However it also looks like at least some RF must be coming in via the power lead.

I suggest a call to your dealer and contact, either indirectly or directly, with the factory. If my memory above is correct they may have the experience to help.