I have never heard the CAT, so I can not offer any comparisons. I do use the Atma-Sphere MA2 MK III's with Dali Megaline speakers which have a nominal impedance of 6 ohms, and it is the best sound I have ever heard.
In addition to offering unrivaled sound, Atma-Sphere OTL amps are the most flexible and reliable vacuum tube amps I am aware of. For example, if you do not need the full power of the MA2's, you can simply remove some of the power tubes to reduce the power output. If a power tube blows, (and I haven't lost one in 9 months), you can simply remove it and replace with another. That is, since they are not matched pairs, you loose 1 tube, not 2. Uhnlike the 6550 and KT88 based amps I have owned in the past which usually tookk out a resister when a power tube blew, that is not the case with Atma-Sphere OTL amps. They are no muss no fuss power amps, which is remarkable since they use vacuum tubes.
Finally, Ralph, Adam, and Bill offer the best support in the business.
Happy listening,
Dennis
In addition to offering unrivaled sound, Atma-Sphere OTL amps are the most flexible and reliable vacuum tube amps I am aware of. For example, if you do not need the full power of the MA2's, you can simply remove some of the power tubes to reduce the power output. If a power tube blows, (and I haven't lost one in 9 months), you can simply remove it and replace with another. That is, since they are not matched pairs, you loose 1 tube, not 2. Uhnlike the 6550 and KT88 based amps I have owned in the past which usually tookk out a resister when a power tube blew, that is not the case with Atma-Sphere OTL amps. They are no muss no fuss power amps, which is remarkable since they use vacuum tubes.
Finally, Ralph, Adam, and Bill offer the best support in the business.
Happy listening,
Dennis