I've been interested in home audio for 40 years. I've owned Rotel, Adcom, etc. etc., but I'd never heard of Sonance. I really like the used Sonamp 275 SE I bought off eBay. It is solid, sounds wonderful and is bargain priced. It delivers 75 w/c with great ease and no appreciable heat. There is a slight relay pop on start-up but nothing concerning. I haven't used the tone adjustment module in the amp because I don't need to and it's suppose to allow wall and ceiling mounted speakers have a better response. This amp is every bit as good as the more recognizable brands.
Built like a tank, small and heavy. Delivers beautiful music with authority. These little amps are true sleepers.
I am using 2 of these bridged, fed from a Sony TA E1000ESD to a pair of stock Cerwin Vega VS120s. The Cerwins are usually a little harsh on the highs and these amps really wake them up, but mellow them out at the same time, if that makes sense. Very neutral sound delivery. Smooth and pleasant highs, detailed mids. Powerful and punchy bottom end. This combo works quite nicely.