Speakers for Atma Sphere M60 mk3

I’ll reiterate some variations of similar speakers here, having owned a few Atma-Sphere amps myself. The Quad ESL 2805 electrostats would sound sublime in that size of a room since they won’t reflect too much off the side walls, and you should be able to easily give them 48-60 inches of breathing room from the front wall.

For Devore, I’d suggest you look at the O/93 as well. They are just simply lively, dynamic, and transparent.

The SF is a 4 Ohm load, rated 91 dB Sensitivity. To convert to Efficiency, which is a more useful spec for tube amplifiers, you have to subtract 3dB on account of the fact that Sensitivity is a voltage measurement, while Efficiency is power. 2.83 Volts into 4 Ohms is 2 Watts and the Efficiency spec is 1 Watt/1 meter. Thus we arrive at 89 dB.

I don't think the M-60 can make enough  power in a room of that size, even when using the ZERO autoformers to correct for the impedance (and also results in more power, about 80 W/channel).

IME, having used speakers of that efficiency in a room of similar size, I found 200 Watts to be more satisfying. You have several options; if you get the M-60s and keep the SF loudspeakers, you want a set of ZEROs and you'll be living with occasionally overloading the amps.

Or you could get a more efficient loudspeaker. Some good suggestions are on this thread (I don't think the older Quads would be good since they are not all that efficient).

Or you could get an amp with more power for the SFs. If you go this route, FWIW our class D amplifier sounds a lot like our M-60s and has no problem driving 4 Ohms with considerably more power.

Thank you all! Many ideas... Elipsas and M60 won´t work. I don't think it´s worth the time trying that combination.

I drive the Elipsas today with a ML No.532, differential amp 2x400w, or 2x 800 at 4 ohms (like the Elipsas). Good dynamics and soundstage for symphonic music..

The Atma-Sphere D could be something to try, they are in Europe, 7.200 USD.

On the other hand there are plenty of used Tube-gear... A-S, ARC, etc. for that kind of money.

I´ll keep reading this post, so feel free to post more recommendations!

atmasphere: Thank you for your answer! Are there any service and repair options (or ways of getting spare parts) in Europe? Being in my second repair on the ML No.532, each for 3.000 USD, I am developing some kind of allergy against US-amps.

Thanks!

@fredag Somehow we've managed to keep our products alive in Europe :) We've been exporting to Europe for the last 33 years. They about built to last and also to be easily serviced.

atmasphere: HARMAN Luxury Audio Group told me that too...but they forgot to tell me at what cost ;). The problem is that many can fix the amps but they do not have access to parts from Harman. Now: can I buy parts from YOU, IF needed? Living in the frozen north is a pain....specially without music ;)