Bryston is a very good device. I tested the latest 7b3 monoblocks in my system. They were just about the highest resolution amplifier I have heard, but they were not a good match. The Bryston amp is extremely fast and high resolution. The problem is that it's too fast for my Krell preamp and rhodium plated cabling. The sound was just too lean in the midbass and too thin in the midrange. The Bryston would likely pair very well with a warm preamp and gold-plated terminations on cables. That's why I put a positive slant on the Bryston with your Marantz 7704. If you did go with Bryston, I would try it out "stock" first, without any fuse upgrades in either the Bryston or Marantz. If the sound is good, then you're fine. A Furutech fuse in this scenario would increase the midbass and midrange body and give you better depth. A silver fuse with Bryston/Marantz could be too fast and too bright/thin.
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Based on googling, the Lexicon branded Bryston amps were the older second generation. The following shows the entire list of versions for the Bryston 4B amp:
4B ==> 4B ST ==> 4B SST ==> 4B SST2 ==> 4B3 (cubed).
I don't know anything about Lexicon today.
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Based on googling, the Lexicon branded Bryston amps were the older second generation. The following shows the entire list of versions for the Bryston 4B amp:
4B ==> 4B ST ==> 4B SST ==> 4B SST2 ==> 4B3 (cubed).
I don't know anything about Lexicon today.