Finally!!! I just purchased some Aerial Acoustics 7T speakers! How do I power them???

The 350.8 Would be Another option for Stereo...The One consideration for any of these amps.... is if they REQUIRE balanced connections, or shorting pins and heat concerns.

Would it be possible for you to hook your 7Ts to the Classe Amp5 just to give a quick assessment?

Here are the amps on my short list:
Theta Dreadnaught II
Theta Dreadnaught D
Classe Amp5
Krell Chorus 5200
Krell TAS

I would like a one-amp solution if possible. My current fears are Polk on-walls, but I want to get something that will match up better. Thus the desire for a good multi channel amp. 

Two channels amp. for your Aerial Acoustics 7T speakers.
A dedicated 2 channels amp. is Much better for music.

Three channels ( five channels )amp. for center and surrounds .( rears , one day )

My experience with Adcom amps back in the day was that they are voiced warm like the B&K, but lacked fidelity and slam.  They also sounded dirty/grainy/messy.  Ultimately, the B&K amps were just so much better.


I don't have experience with the Theta amps, but I think they are going to be in the neutral / uncolored category.  Likely to be very excellent.  I don't have experience with the nCore Class D circuits, but I have always preferred Class AB amps because they have better extension into the ultra-high frequencies.

The Theta Dreadnaught D can get very expensive.  If you are looking for an alternative, take a look at the ATI AT5XXNC series.   They use the same nCore amp circuits and also have linear power supply like the Theta, but these are much cheaper.  The Theta looks to have much beefier power supplies, but it can cost double or more $$$.

The Krell TAS (Theater Amplifier Standard) is part of the Krell Evolution series amplifiers.  In my opinion, these were the absolute best amplifiers that Krell made.  They are very high resolution and very transparent / uncolored.  They are not like the newer Chorus/XD line, which are lush and colored.  The downside is that they are very old (17-19 years).  If you are interested in the TAS, I would consider sending it to Krell to have it refreshed / recapped. 

The Tas was a Dagustino design with the same concerns as the rest of the line(Thermals, power and weight)... I would use a dedicated circuit for it, make SURE you have the shorting pins for each channel, I am not sure if that one was switchable or not
(Pins) or you will need to pick up some of the Cardas pins
And Make sure with Dan at Momentum that these are still supported repair wise.

I don't have Aerial 7b, I have Snell XA90PS and I am only using the Sigma Amp5 for a center and surrounds.

As Far as the Thetas go... Aux is right they are super neutral.
https://hometheaterhifi.com/volume_9_2/images/krell-amp-rear-panel.jpg