I bought the Rotel RB-850 several years ago as a close-out. I was able to open the case in the store and inspect the quality craftsmanship of the unit.
It is a joy to use with dual transformers. Both channels are on the same board but dual mirror in layout.

I've modified my amp extensively.

I've added a 10K-ohm/1k-ohm L-Pad on the input(internally rewired from the input jacks to the main board.

I've added a delay speaker-on relay on the speaker outputs.

I've added front panel channel on/off switches.

I've added a remote relay turn-on control(120VAC relay)

I've bypassed the bridged mono switch to always stereo.

I've wired the bridged mono front mounted LED to be a second power indicator.

Loads of fun and works like a charm.

I was going to use it as a Tweeter amp with my two AudioControl electronic cross-overs but it works great as a sub-amp.

Best $250 spent on an amp. . .

clean sound

none

I use this amp in bridged mode to power my PSB Image 9c center channel speaker. I'm very happy with the sound and would highly recommend this amp.

Similar Products Used:

Bryston 2B, Yamaha M35