Zu speakers with Atma-Sphere M60 amplifiers

If you have to much gain (very little volume control) you can also replace V2 with a jumper plug to lower the amps gain. I run Avantgarde Duo Omegas with M60s with only 4 tubes per amp and V2 jumper-ed out. Atma-Sphere can set you up with a pair of plugs or you can DIY them if needed.

you might ask Zu (Sean) to make sure the impedance is correct for OTLs---as I recall, you can have this adjusted at the factory.

05-09-10: Keithr
you might ask Zu (Sean) to make sure the impedance is correct for OTLs---as I recall, you can have this adjusted at the factory.

That's a good point. Certainly worth checking with Zu Audio, but be certain to tell them specifically which amp is being used.

As I recall from a dealer who once sold Zu Audio and still sells Atma-Sphere, the tweaked Zu impedance was more important for use with an Atma-Sphere S-30 amplifier. The output impedance of the M-60 amps is lower than the S-30.

Hi folks:

Thanks for the guidance here. I know the factory can implement a mod that increases the impedance but I thought that if I changed amps for any reason, the factory configuration would be more forgiving with most other amplifiers. I'm happy to hear the M60s will drive these speakers adequately.

Check out this thread, toward the bottom:

http://forum.audiogon.com/cgi-bin/fr.pl?cspkr&1259232779&openfrom&10&4#10

Ralph says he likes the Druid better with the M60s than the S30. If the Definitions are similar, they might follow suit.

David