Well I finally broke down and swapped out the caps in the T2. There wasn't anything wrong with them except being 15 years old, but they could have been the source for the hum which sensitive phones like the SR-003 pick up, so they had to go. First up, a couple of shots of the underside of the PSU board since it had never been removed before:
The old parts were all good quality so I went a similar route, Panasonic and Nichicon caps with one Black Gate FK thrown in for good measure.
The hum is still there but less of it. I must be crazy but there appears to be a little more bass slam. Stay tunes for hourly updates as the caps burn in...