Thorloki 9-22-2017What about DC **input** protection? (See my further comments below).
The amplifier used was the Bryston 28B SST3 1,000 watt per channel
mono blocks....
Thorloki 9-22-2017
As for Bryston amps DC protection, I personally spoke to Mr. Brian Russell, one of the owners of Bryston, and he ASSURED me, that
the 28B SST3 DOES NOT have DC output protection.
Also, looking at the Bryston site it appears that the SST designation is not used for their "cubed" series amps. Did you mean 28B3, or perhaps 28B SST2?
Ralph (Atmasphere), while a schematic for the 28B3 does not appear to be available, a schematic for the 28B SST2 can be found at the Bryston site here.
Note in zones B1 and C1 on the second sheet that a 68 uf capacitor is in series with the inputs!
Personally, FWIW, I believe the OP is sincere, but I don’t know how to reconcile the reported experience with the presence of those capacitors, which would block DC. Unless the amp is a 28B3, and that design omits any such capacitors. I note, though, that the bandwidths of both designs are identically specified, down to "<1 Hz," which suggests that they may be similar in that respect.
Regards,
-- Al