Is a Bryston 3B SST2 enough for Magnepan 3.7i or 20.7?

@almarg

Hi Al,
got a question for you:
I’m looking at a stereo amp that can be bridged into mono, the increase in output is about 6 db over stereo:
From 325@8/540@4 -> 1100@8/1500@4
however,
-the gain @8ohm also increases from 31 ->37 db
-while the input sensevity decreases @8 from 78.8mV ->39.3mV
-a decrease of input impedance (balanced) @ 1khz from 95k -> 47.5 k ohms
-Stereo damping factor for 8ohm of 500@20khz is also cut by half for the mono mode.
-the output noise goes from stereo -95dbw -> -92dbw in mono 
So,
What is the net effect on the sound, say these 3.7i or 20.7 Maggies, when this amp is bridged? Any degradation anywhere?
(I omitted the brand and model of the amp, also the links to the review & measurements, cause I don’t know if that’s allowed by Agon or not.)
Many Thanks in advance

Thank you Al,
Ok then the idea of bridging just went out the door...🤗
But To make sure I got this right:
So what you are saying is that the amp should also close to triple it's power into the 2 ohm load (in the bridged mode) or about 3000w, in order to sustain the same increase of 6 dbw?

Another question that perhaps pertains more to the discussion/argument in this thread:
I have a Levinson 532h which has similar output ratings to the Bryston 4bss2 in Elizabeth's comments (before they disappeared), or the newer 4b3:
355@4/500@8/660@2 ohms (all@ clipping 1% Thd+N per Stereophile)
The amp which I was referring to in my prior post (I'll name names now since everyone else is doing it!), Simaudio 870a, or the prior model W8, have output powers which are pretty close to the other two:
310-325@8/550-600@4/ about 1000@2 ohms (w8 per Stereophile, 870a in soundstage review)
But the Sims have a pair of much larger toroidal transformers: 1.3 kV vs .5 KV , as well as about 240k vs about 96k of capacitance... and though I couldn't find the output Amp, slew rate etc. for the other two, the Sims show 28 amp continuos/62 amp pick power for these models, slew rate of 42, a damping factor of 800@ 20hz/500@20khz vs the Bryston's 500@20hz/25@20khz (couldn't find it for the Levinson)...

Now understanding that these amps could sound different from one another, my question is:
Do these larger transformers, more capacitance etc. etc. have a noticeable affect on these Maggies even though the indicated output wattage of all three are very close to each other ?

Lastly,
if anybody is interested, Hifi news did a review of the 20.7 and found it to be an "Outstanding product", though in their measurements they estimated the speaker's sensitivity @ about 80db instead of the declared 86db.
https://www.hifinews.com/content/magnepan-magneplanar-207-loudspeaker

Al
Thanks a bunch for all the info, I'm pretty sure I got them...
And you are correct on the last point, it was a typo on my part.
All the Best