Sunday, July 1, 2012

Sansui B-2102

The B-2102 is the companion for the C-2102 pre-amp and is a X-Balanced System power amp.

Front view of the B-2102
There seems to be little information on the internet for the B-2012. I can confirm the B-2102 specification is similar to the B-2101. Main differences are that the B-2102 is a B-2101 with a different facade, large caps of 8,200uF instead of 10,000uF. Lastly the DISPLAY OFF switch only disables the audio feed into the meters - does not switch the meters off. Like the B-2101, the B-2102 is a scale-up version of the G90X amplifier section - with 8 transistors per side vs 8 transistors for both channels on the G90X.

Recapped the B-2102 a few years back as it was sounding dull. Came across across leaked caps on the PSU board with many very tired caps on the power amp boards. Used Panasonic ECA, FC and FM; Rubycon, Wima(s) and misc caps.


Top with cover
Top with cover removed

Recap PSU and LHS driver board
Recap RHS driver board

8,200uF caps
Power amp board on one side

Details of the B-2101 are available on the web at specificationsbrochure-1 and brochure-2

I find the B-2102 to be sweeter than the B-2101 though the specifications are almost the same as the other model.


  1. I am running 4 of the beasts they are the heart of my system 2/B-2101 & 2/B-2102's. Each set is powered by it's respective C counterpart preamp a C-2101 and C-2102. I power 4 set of Sansui Monster Speakers with all output juice from the amp. 2/SPX-9's 5 Way, 1/XL-900's 4 Way and 1/SPX-8000's all of which I have rebuilt their passive crossover networks and replaced all of Caps with Metalized Polypropylene Capacitors from Dayton Audio and Jensen Inductors. This system has taken me over 2 decades to put together since you just cant waltz into Kmart and pick it up. I love your blog...