Sumo Nine Plus Amplifiers

I cannot recommend this amplifier enough. I had 3 of them including an original prototype. I was also a friend of James so let me share a couple things he said. First off he always claimed the output was 75wpc. Also the opamp in this is a special order...

Have owned the Sumo The Nine amplifier for decades. Purchased used at The Listening Room, Westchester Cty, NY. Actually I purchased 2 of them. Has played reliably and beautifully for many, many years. Had it recapped about 15 years ago. Really didn't...

I origionally purchased the Sumo Nine in 1984 along with the Sumo Electra preamplifier. I was initially driving a pair of Tannoy Windsors which gave way to a pair of Acoustat 2+2 electrostatic panels which I still have. I still use the Nine and just...

I've been using a SUMO Model Nine amp for my main system for about 4 years now. It is a fabulous sounding little amp! I think solid state "class A" is the way to go if you want a somewhat tube sound without the eventual maintenance issues.

Bought 2 Sumo Nines when they were first produced (early 80s?). Have been using since then driving Dahlquist DQ10s, Magnapans, and now Sound Dynamics 300ti.

I am really quite surprised at that I found any reviews on this product at all! I know that Sumo's been out of business but could still have some of the Bongiorno descendants out there; most notable of his products would have to be the Sumo Nine and...