McCormack , Aragon or Forte

One more vote for McCormack amplifiers ...they are capable of multidimensional lifelike sound. With SMcAudio upgrades, non of the other amps mentioned will compare. Good luck and enjoy!

Not all Forte amps used IGBT's, and the ones that did weren't from the pen of Nelson Pass. Though he was there at the time (and on his way out), Mr. Pass was not a fan of IGBT's.

Yes Unsound you are correct, the one I had I in for bias control repair I think I remember now were BJT (bi-polar), 2N3055 & MJ2955 or MJE15003 & MJE15004. Don't know were I got the IGBT from. They can still push current as just as well also into those Apogee's

Cheers George

Nelson Pass did design most of the Forte4; and I remember company brought in this engineer from Sweden who instituted the IGBTs, to whom Nelson Pass gave full credit. As a tube guy I just loved the Forte 4. My favorite solid state amp of all time. I admit I only have experience with a dozen or so SS amps.

I use a McCormack on my Apogee Duetta Sig's, but it is the DNA500, with tons of SS current. I doubt that the DNA .5 would be sufficient to run your Centaur's. You should look at a DNA 1 rev A, or a DNA 125 at least. But probably a 225 would even be better.