Sony SA-WVS350: Low Frequency Hum


Novice Member
Hi, I recently purchased a Sony SA-VS150H home theatre system off eBay. I am a complete novice with setting up AV equipment but it was a good price so thought I'd give it a shot.

Upon receiving the speakers I realised it was a relatively old system, so apologies for posting about old gear. I then purchased a Sony STR-DA2400ES to connect up the 7 speakers and active subwoofer (Sony SA-WVS350).

Unfortunately the subwoofer is emitting a constant low frequency hum, with no output from the TV (connected via optical cable). I have tried messing around with the settings, resetting the amplifier and changing the inputs, all to no avail.

I've run out of ideas, any help would be greatly appreciated!

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