Amp with best bass control

When I bought my Krell 300cx I had auditioned the Sim amp as well. There are 2 reasons I went with the Krell. The speaker terminals are way too close for my liking. If you put a set of spades on them the sides would be very close to touching & it frightened me. We are talking close. 2nd reason is I believe it is on all the time. I dont mind stand-by, but on, I didn't like. No switch on the front.
The Simaudio W5 amp had great bass and sound quality when I auditioned it. It is a very good product.

Isn't Class A supposed to be superior for bass control? Wyred 4 Sound is one example.

Wyred4Sound amps are all Class D, not Class A.

Thanks all! Speakers will likely be Raidho D3's.

Krell was my first reaction, especially the evo series, but I want to hear them along with Constellation, Vitus, Jeff Rowland and a few others. I've heard (and loved Soulution), but fear the 500 monos might not have the power I need. The 700 series is out of the question, maybe the 711 stereo which is coming. But I have a thing for monos!

Thanks again!

Well I would calmly vote for the Boulder 1060 as I know it well. This amp has enormous power reserves and delivers 600 watts @4ohms and has a damping factor of around 4000! The 1060 is also fast thanks to it's vast array of output transistors and distributed power supply. Damping factor is really the more relevent indicator of an amp's ability to control a speaker. It is also extremely well engineered and reliable. Depending on your budget, you can step up to the 2100 or even 3000 series. As you move up the Boulder line, you just get more of everything. Don't believe earlier hysterical comments about Krell. Boulder ran an a-b comparison at a Dealership in which a 1060 was thrown up against Krell Evolution 900 mono blocks and was much more dynamic and powerful sounding (especially in low bass). Paper specs are bs, and frankly Krell trade off their reputation. Boulder are the real deal. No other manufacturer has that level of engineering capacity or in-house content.