Hi,

Thanks for the replies, I binned all the old caps so no good. I have got some new nichicon UKAs to go in but would rather not recap the whole thing again. I have recapped both comms and amplifier boards. If it is instability, my research suggests it could be the lm317s oscillating due to the low esr, however, from what I have found is that noone has reported a similar issue.

Does anyone have a DSP7200 or similar they could run briefly on a DBT to see if it behaves the same way?

Meridian DSP7200.2