Originally Posted by SRcurtis
The only time audio is heard is if I run a speaker calibration test from the Meridian Config program, I'm guessing that the noise generator for this is local to the speaker. Sending a sine wave from the G68 outputs no audio to these speakers.
An incorrect assumption. Speaker calibration tones are not generated in the speakers, but in (this case) the G68, just like the sine sweep.

So sounds like (or not, pun intended) that the fault lies outside the speakers.

Maybe a retype of G68.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).