Best Cheap Amps for Magneplanar Speakers

randy-11, you have some good suggestions above, and I particularly like the Classe suggestions. However, i would like to offer some thoughts for a different approach which is the route that I took over the many years that I lived with MG3A’s; some here will surely disagree with this approach:

There are different ideas on what constitutes "great" sound. For my idea of what "great" sound from Maggies means one needs a tube amp. To my ears Maggies with anything other than the very best solid state amp tend to sound lean and dry; deal breaker for me. Additionally, the ribbon tweeter in the 3 series is ruthlessly revealing of any problems with your amp’s high frequency performance which can cause an audible discontinuity between the tweeter and mid panel. A good tube amp gives the Maggies a sense of fullness and dimensionality of individual images that eludes most "affordable" ss amps as well as tending to have a more "friendly" high frequency character. With a decent tube amp Maggies can produce sound that is remarkably like the sound of live acoustic instruments and voices IF THAT IS YOUR PRIORITY. The downside is that your maximum volume levels MAY be somewhat limited and ultimate bass response and extension will not be on quite the same level as with a good ss amp. This was never a problem for me and while I listen primarily to acoustic jazz and classical I also listen to pop and rock.

When I read you OP, my first thought was, of course, tubes. But, for $1000? No way. I did a search of used offerings here and to my amazement there are two great options that I owned before settling on the Manley 100W monos that I still own. Both are fantastic amps for the money (no affiliation with either seller):

https://www.audiogon.com/listings/tube-quicksilver-mono-el34-2016-12-18-amplifiers-90713-lakewood-ca

https://www.audiogon.com/listings/tube-david-berning-co-ea-2100-stereo-tube-amplifier-2016-12-14-amp...

The Berning will give you more output, is fast and is the least "tubey" tube amp that I have ever owned. Because of the design tubes will last a very long time. The Quicksilvers have a midrange and dimensionality to die for (in this price range) and are classics. Don’t let the Quickie’s 60W rating scare you if you listen at moderate volume levels; it is a very solid design. I fully expect some will write that 60-100 watts is not nearly enough for these speakers. It all depends on the size of your room and listening habits. I have a soft spot for the Quickies but the Berning is probably the safer bet with a bit more power....but that Quicksilver midrange! If you can stretch the budget a bit, this would also be a great choice and is what the original owner of my Maggies used for great sound:

https://www.audiogon.com/listings/tube-conrad-johnson-premier-four-100w-ch-tube-power-amplifier-2016...

Good luck and Happy New Year!

The Bryston 4 series has been mentioned a few times.  It should be noted that this was the "de facto" recommendation for Maggies back in the day; from Magneplanar themselves and from Lyric Hi Fi, the biggest Magneplanar dealer at the time (80-90's).  This was the "affordable" amp recommnedation for many years.  Having said that, while the store demos using Bryston sounded good, they never sounded nearly as good to me as the demos using tube amps.  I can't help but notice how often the term "to drive" is used without, imo, enough emphasis on the quality of the resulting sound.  Sure, something like a large Adcom and many affordable ss amps will "drive" Maggies well and provide plenty of output and decent bass (maybe), but the sound will lack refinement and finesse.  While the ultimate dynamic range may be wider than with a moderately powered tube amp, on a micro dynamic scale the sound that a decent tube amp can produce within a narrower dynamic range may have a better sense of aliveness and excitement; not to mention the possible advantages in the areas of timbre and dimensionality.   

Randy, I am no expert on ss amps I can’t possibly claim to have heard every ss amp in this price range in order to give you a specific recommendation. What I can tell you is that the most recent good quality ss amp that I tried on my Maggies was a Levinson 23.5. It was a very good amp, but still sounding like the ss amp that it was. In fact, I personally have never heard a ss state amp that sounded like a tube amp. Some do have qualities that are sometimes considered tube traits like fullness of individual images and absence of hardness in the upper frequencies. Of the things that are priorities for me, what tubes do that I have never heard affordable ss amps do is give a sense of dimensionality and separation front to back and not just side to side, a sense of aliveness by way of subtle dynamic gradations and not just the ability to play really loud, and inner detail in the texture of the sound of instruments. To me, most affordable ss amps still sound a little mechanical. While I am sure some will disagree, in this price range the general differences in sound between tube and ss are still pretty significant, imo.

Dave, I'm glad you were able to achieve great sound with your gear.  My comments were in reference to affordable (<$1000) ss amplification and I have not heard everything that's out there in that price range.  Still.....

Nice system page, btw.  How's your ET2 working out?  Love that arm!  Happy Holidays.