Which subs? You should remember that bridging a stereo amp cuts the damping factor (bass control) in half. I've owned (4) 555IIs, the three with Toshiba output transistors sounded better than the one I had with ADC transistors.
Just take a flashlight & look in the side of your Adcom, you'll be able to read the transistor brand name.
I used Adcom 555IIs and Parasound HCA 1200II THX amps to drive passive Snell Sub 550s with a Sumo Delilah crossover, mated to Magnepan 3.3Rs running full range. Both brands sounded good, but sounded better NOT bridged.
An Aragon 4004 MKII is equal to a pair of Adcoms or Parasounds, you can find them used for around $700.00
Just take a flashlight & look in the side of your Adcom, you'll be able to read the transistor brand name.
I used Adcom 555IIs and Parasound HCA 1200II THX amps to drive passive Snell Sub 550s with a Sumo Delilah crossover, mated to Magnepan 3.3Rs running full range. Both brands sounded good, but sounded better NOT bridged.
An Aragon 4004 MKII is equal to a pair of Adcoms or Parasounds, you can find them used for around $700.00