Amplifier for the magnepan 3.7i

I own the Magtech and 3.7i's and think it's a pretty good match.

partel and randy-11,

No big deal and probably just typos but:
    'Rouge' is makeup women use on their cheeks.
    'Rogue' is the amp maker I think you're both referring to.

     As to a good amp for your new Magnepan 3.7i speakers, I think an important consideration is whether or not you're planning to use sub-woofers in your system.   

     With 70% of each 3.7i panel devoted to quasi-ribbon woofer sections reproducing frequencies of 300 hz and below, bass response is very good but only extends to 35 hz.  This is plenty deep for many people but I'm not sure if you wanted your system to go even deeper by adding subs.  I would suggest you set up your speakers initially without subs to determine for yourself if the bass meets your expectation.

     I would recommend you audition the D-Sonic M3-1500-M mono-blocks as a great match for the 3.7i.  These are high powered class D amps rated at 1500 watts @  8 ohms and 2,400 watts @ 4 ohms.  The current price is $2,750/pair and they offer a 21 day in home trial period.  

     Here's a link to a 6Moons review of the M2-1500-M amps that, according to the owner Dennis Deacon, are exactly the same as the current M3-1500-M amps:

ww.6moons.com/audioreviews/dsonic/1.html

     I think these amps would be very good on your speakers for several reasons:

1.They're going to provide 2,400 watts into your 4 ohm panels which will provide an effortless presentation with plenty of backup power for powerful and accurate dynamics that will avoid clipping.  The 6Moons reviewer drove a pair of notoriously hard to drive Apogee panels, with very low and demanding impedance dips at various frequencies, using these amps with excellent results.  The 3.7i  are not nearly as demanding with a relatively stable impedance that rarely dips much below 4 ohms at any frequency but a relaxed, effortless presentation sounds best on any speaker with any music.

2. If you'd rather not use subs, these amps have excellent bass response.  The high power and damping factor (1,000) of these amps are the main reasons for the exceptional bass response.  I use less powerful D-Sonic mono-blocks (M3-600-M that have the same damping factor but half the watts @ 4 ohms) on my older Magnepan 2.7qr speakers and I've never heard these speakers produce better bass.  Even if you ultimately decide to add subs, this quality will still benefit your system performance.

3.The last benefit I want to mention is the mid-range and treble qualities of these amps.  The 6Moons reviewer describes them as having a tube-like full and dimensional mid-range with a smooth treble that is detailed and not rolled-off.  I thought these qualities might be of interest to you since you're also considering using the tubed Rogue M-180.

     Overall, I believe these amps are a very good match for your new speakers.  My thought is that you may want to audition these amps first before even considering more expensive options that may not perform as well since they are a very low risk option due to the in-home trial period and because they offer true hi-end performance at a bargain price.  

Hope this helped you,
    Tim

     

     

This discussion may be helpful.

https://forum.audiogon.com/discussions/best-cheap-amps-for-magneplanar-speakers

Thanks noble! The  rouges was auto correct  :O)  I will check that amp out, I am not familiar with the  D sonic brand.

Hi partel,
     The review is very informative about how good the D-Sonic M3-1500-M amps really are.  The reviewer made them his new reference amps.   I sincerely think these would be an excellent amp choice for you. 

     I know you could spend a lot more for amps that would not perform as well.  I'm not claiming these are the best amps out there, just that I'm not aware of any amps anywhere near their price that are better.  In fact, the only amps I can think of as a possible challenger cost $10K more, the Merrill Audio Veritas mono-blocks.  Also, these amps are small, lightweight, electrically efficient (green) and barely get more than luke-warm no matter how hard or long they are driven. 
     In my opinion, the only traditional type amps that you may like the sound of equally or better are powerful class A amps (Boulder, Gryphon, Rowland, etc.) or powerful tube amps (Audio Research, VTL, Atmosphere, McIntosh, Lamm etc.) that are very expensive, huge, heavy and electrically very inefficient.

     I suggest you give the D-Sonic mono-blocks a home trial before even considering a powerful class A or tube amp.  I seriously doubt you'll regret it since you'll get reference quality performance, spend thousands less and have zero risk since you are able to return them if you're not completely satisfied.

Good luck,
   Tim