Solid state amp recommendations for Maggies?

The stereophile measured this speaker well and came up with a quite low efficiency and lower than advertized impedance.

Tube amps use output transformers with secondary taps for loadmatching and typically do well with "nice" loads. The reflected load impedance may well match the output tubes, unlike solid state amps where the voltage on the load does not change much  with the load impedance. 

These Maggies don't fit into the "nice" category either for load impedance or efficiency.  I think you be chasing your tail with these speakers trying to find a suitable SS amp. It is hard to beat tube amps, especially if they have sturdy power supplies that don't dip under peak loads, i.e. massive capacitive energy storage.

Look for speakers with 90+ dB/ 1W /1m.

Beware of the "2.83V" spec used in speaker measurements for tube amps which mostly resemble a "current source" rather than a "voltage source". The 2.83V is used to mask impedance problems. 

I have Maggie 3.7i and I am currently running them with them between a Bryston 4BST and BAT VK655SE.  I have also used Parasound (two thumbs down) and Upgraded Haflers DH600 (Good).  the Brystons win easily.  If you really want a mellow sound and really don't care about imaging and dynamic range then the BAT might be right for you.  They Brystons preserve the speed, impact and imaging potential of the Maggies.  On paper the BAT's should have been a great match with it's higher power, higher current and mammoth power supply, but I will be upgrading back to Bryston.    

@meiatflask 

With the PrimaLuna HP, I believe you can roll in the Tung-Sol KT-120 tubes. Have you tried that? I think you would be surprised how good the LRS would sound using the PrimaLuna with the KT-120 tubes.

In my somewhat larger (14'x28') room, I'm having no trouble driving my 1.7 Maggies with either my 100W Rogue Cronus Mag. II  withe KT-120 tubes, or my old SS 200/350W ADCOM. Listening to the same music as you, at moderate levels, both amps do incredibly well. A little larger stage and presence with the Rouge and slightly more dynamics and punch with the ADCOM.

I think the idea that the smaller Maggies need massive amounts of power to sound good, particularly in a small space at moderate volumes, is quit overstated and a bit overblown. If considering a future move up to the larger 3.7i or the 20.7 then investing a Bryston 4BSST or Cubed would be a great match with any of the Maggies. JMO.......Jim

Hello, I have many years of experience in hifi audio.  There are some amplifiers I can easily recommend but a more important point to make is about quality.  I’ve never had good success matching tube amps with Magnepan speakers.  And also had to go through many Solid State amps till I found the one that sounded great on my Magnepans. If I were you, I’d first be heavily leaning toward a Class A design amp because I’ve always found them to sound the best. Class A designs are more transparent and “flesh” out the music better.   I would also go with a very well known and popular amp amongst audiophiles.  Newer or older designs won’t make much of a difference IMO as long as it’s a Class A amp and built with high quality.  You shouldn’t need much power as I have gotten great results using a 50 watt amp on the big Maggie’s. I think my main points are,  stick with quality, choose Class A design, and research what’s extremely popular and sought after amongst audiophiles and you will be happy with your purchase.  Some amps are very detailed and others are very musical but with tweaks like cables, you will be able to adjust the sound to your liking.  Good luck in your journey, I’ve been in it for 30yrs and have settled on what I believe sounds best to me. 

Many very well respected amps mentioned. Whichever you choose do yourself a favor and take a close look at Hegel; as others have recommended. I would suggest the H360 which is an excellent amp/DAC/streamer that you can acquire on the after market at very reasonable prices. Also a step up is the newer H390. This is an excellent amp that will match perfectly with your speakers. Either Hegel will drive them with ease and sound beautifully doing it. I have owned both and compared them with amps costing many times the price and believe it or not they always performed on par with the best at fraction of the cost. Your ears will thank you!