Class A bias, speaker sensitivity, watts...?

Shengya is the designer/manufacturer, a home grown Chinese brand that’s been around a while and their amps are quite good for the price. I’ve tinkered with their products in the past.They make other amps on contract for brands like Vincent in other continents that don’t have manufacturing prowess.

Many ’ultra high end’ amps sold to you as European/North American brands are actually designed/manufactured by Chinese engineering. When it gets to European/North American shores, it gets an astronomical markup and a brand name so the buyer can feel like he is in the "ultra high end" club.

Don’t worry too much if you couldn’t spend big bucks.

Thank you all for the replies and insights. The question was more of a curiosity than anything. I’ve been into music since the late 60’s and audio gear since the mid 70’s. Regardless of operation, through a slew of solid state and tube gear, this amp is the best I’ve had and considering I can’t afford to spend big bucks, the system on the whole is very satisfying.

Yes; for.a small office you've got probably 10x the power you need for those listening levels.  A, A/B or other, watts is watts.

If your amplifier had VU meters your question would have been easily answered.

Yeah, you are still in class A. Unless you have really inefficiant speakers, or a very big room, most of us are only using a couple watts for normal listening. 

Around 80db at my listening spot is also around a watt. 10w is vibrating the house, 100+w is vibrating pictures off walls. 

It’s really easy for me to figure. My amps put out about 10 watts class A into 4 ohms. My speakers are rated at 91db at one meter and my listening position is 2.5 meters from my speakers and seeing as I rarely go past 75-80 dbs, I’m I’m class A most of the time.