Exposure 2010S bi-amp to ATC 11 Speakers

How would the power not be increased by bi-amping? Your intergated would power the tweeter, and the power amp would power the woofer.

ATCs require a ton of power to open up. They're also ruthlessly revealing of anything upstream, so you need good components all the way through.

If what you bought doesn't do it for you, strongly consider ATC's integrated. It was designed to power them.

ATCs also need a good amount of space and SPLs to really shine. If the sound dull and boring, which is easy to do with them, something is amiss. With the right conditions, they're magical. Unfortunately, that's hard to pull off IMO.

I really wanted to buy a pair, but I couldn't afford to buy what they need to get them to sing. My 60 watt Bryston B60 fell on it's face. I wouldn't go lower than a Bryston 4B SST or ATC's integrated, but that's just me. YMMV.

Again, I did not have any problems getting my ATC to sing. I am using an Odyssey Stratus Plus+,with a cj classic preamp.

As I write this I'm listening to ATC SCM 11s powered by Bryston 4B sst2 at 300w/ch. They do not sound dull or boring as a previous poster mentioned. They are awesome. The detail and lack of distortion is astonishing. These are some very special speakers indeed. I purchased them on a lark, but they just might be a permanent replacement for my Dynaudios. It's not just that they are so completely clean of distortion, but they are incredibly dynamic. The sound leaps out of these babies. Extremely high value for money with these.

How would the power not be increased by bi-amping?

The amount if energy (available current) would increase.
But two amps, each outputting 75W, don't sum up to 150W. You simply have "MORE" of those 75W available...