Hi, I would appreciate some advice if possible please…

I recently purchased a 568.2 and a DSP33C.

The DSP33 works when fed directly.

I hooked it up to my 5200’s which work fine, but when I added the DSP33C as master in Trifield mode, the comms work but there is no sound from the centre.

I’m not sure if missed something but I would like to know if there is a simple way to check that the centre channel on the 568.2 is working.

Many thanks

568.2, 5200’s, 5200hc, D1500 sub