I've said it before, and I guess I'll say it again: For lovers of Magneplanar speakers, there is another magnetic-planar that is much better suited for use with tube amps---the Eminent Technology LFT-8b. It's nominal impedance is 8 ohms, but the m-p drivers themselves are a resistive 11-12 ohm load. Bi-amp (or even passively bi-wire) them with a tube amp on top and ss on bottom (for the 8" sealed box woofer, which operates via a 1st order-6dB/octave x/o from 180Hz down), and you won't miss your Maggies at all. Actually, many who have heard both prefer the ET's, even if they run them with a ss amp.
Amps Atma-Sphere M-60 Mono blocks OTL design
I just purchased a used OTL Atma-Sphere M-60 mono blocks that I have sent to Atma-Sphere to be upgraded to the current model 3.3 and I also added the option of a higher quality power supply and V caps.
I have sold my old trusted Eggleston Andra 2’s speakers and have built some monitors using Aurum Cantus ribbons (102db) and Aurum Cantus midwoofers (90db) that are both rated as 8 ohm nominal. I have a DEQX Premate and will be crossing over to (2) JL Audio F-113 subs at 80hz.
Currently I am using a solid state high power stereo amp (Pass Labs) that I used with the Andra 2’s.
The Atma-Sphere M-60 is rated at 60 watts class A and is said to work better with higher impedance loads.
It will probably be a few weeks until I get the M-60 and was hoping someone could provide opinions of what to expect.
I listen to late 60 early 70’s classic rock music mostly. Sometimes loud.
ozzy