The $27,900 disappointment? Wilson Audio Watt Puppy 8 issues.

I’m not so sure I’d jump on tube amps as problematic for Wilsons because of a 2-ohm dip. Especially with mono 275’s - those 4 ohm taps actually become 2 ohm taps in mono mode (check the manual). Try those 4 / 2 ohm taps versus the 8 ohm (4 ohm mono) taps, and choose whichever sounds best. I suspect one or both of them will sound great, and you won’t hurt anything. In fact Solid State amps are the ones that you have to worry about, if they’re not truly "2-ohms stable"! Look for a solid state amp that spec’s its power ratings down to 2 ohms - otherwise, cross your fingers and good luck! And if you are bridging a SS to mono, you are REALLY playing with fire putting that on a 2-ohm dip (don’t do that unless you have something like a Krell spec’d down to 1 ohm). The way that tube amps "switch to mono" is by paralleling the OPT’s, which should actually work nicely for scenarios like this. By comparison, SS bridging is bad news here.

Some of you guys will move mountains to solve problems that don’t exist
Anyways - why not ask Wilson what they think / suggest?

Thanks for the recommendations.   I actually like the 4 ohm tap on the MC275s in monoblock running the W/P 8s.  The reason is additional low bass.   In addition, low quality CD recordings with no bass that normally sound thin, actually sound much thicker on the 4 ohm tap.  The manual says I should be running the 8 ohm tap because I am running them as monoblocks, and now the 8 ohm tap is 4 ohm, and the 4 ohm tap is now 2 ohm, but, it does not stop me from liking the 4 ohm tap better....  On recordings with decent bass, the 4 ohm tap vibrates the furniture more..  It is like I have an additional sub in the equation.  

Well I have owned Adcom amps and they never were high end. Good value to be sure. There is no advantage to low impedance speakers on either S.S. or tubed amps. Sure you get more power on low impedance loads but you also get much more distortion and most likely the nasty type. I have never talked with a mfgr. of S.S. devices that didnt say their gear sounded better on higher impedance loads. It is a flaw and a flaw which isnt necessary. I wouldnt expect Wilson to admit this since this seems to be a common thing with most if not all of their speakers. Problem is the best I have ever heard the Wilsons sound is with tube gear and lower watt tube gear to be exact. Of course when they turned it up things went to hell in a hurry. 

Thanks.

For one MC275, I found some specs:

16 Ohm tap 34.6 V / 2.2 A
8 Ohm tap 24.5 V / 3.1 A
4 Ohm tap 17.3 V  / 4.3 A

So, when I monoblock my two MC275s on the 4 ohm tap, I should assume the voltage stays at 17.3, but, the current doubles to 8.6 A, and the resistance changes to 2 ohms...

By the same rule, the 8 ohm tap also seems adaquate because the current doubles, and the resistance goes to 4 ohms. I guess I am wondering where is the trade off for Voltage vs Current regarding the sweet spot for the two MC275s parallel monoblock and the W/P 8s ?

I guess I am wondering where is the trade off for Voltage vs Current regarding the sweet spot for the two MC275s parallel monoblock and the W/P 8s ?

This is where the analysis ends and listening takes over - both the 4 and 8 ohms taps should be perfectly adequate, for W/P 8 in your configuration. Listen to each over a few sessions ands pick your favorite. Most tube amp manufacturers will tell you the same (e.g. VAC stresses this - and they make tube amps in the same stereo/mono switchable configuration). If Wilson Audio has extensive experience with W/P 8 on mono MC275's (or similar tube amps) they may give a more specific recommendation, but at the end of the day it's a preference. 

SS amps will again give a different sonic result, but you need to be more careful there - ensuring the amp is going to handle 2 ohms without overheating or tripping fuses, protection mode, etc. As another poster mentioned - SS amps do (usually) produce more power into low impedance, but they have to work a lot harder for it, and that has ramifications. Tube amps are actually all fine here, no worries!