Best amp for Avalon

Most Avalon owners would have to use an RCA to RCA 100k trimpot right hat the input jack of the bass amp which usually has higher gain to attentuate the bass.

I have owned Ascent II, Eidolon, and Monitor and have tried more than 10 amps on the Ascent IIs.
Radian is of similar drivability so be prepared.
The sealed box Eton woofers are almost impossible to drive.

High power tube amp will make the highs grainy.
Low power and it clips very easily.
The only 2 amps that were able to drive my Ascents full range non bi-amp to play at decent volume without heating up the whole house, ironically, were solid state... TRL Samson and Pass 350.5.
You can forget about those Audio Research monos, Krells, and Levinson.

Johnsonwu
Did you go all solid state or tube preamp. Which amp did you like better Pass or TRL

So do you think beaming is better than one big beast?

Biamping not beaming sorry auto correct

Tried all sorts of preamps during my Ascent days.
The only preamp I liked was an MFA Lumi which I eventually cloned myself.
Had a Ref 1 for the longest time when I had the Ascents as my main speakers. Open, quiet, overwhelming, and not musical.
You can't trust sand devices with small signals.
Might as well use a transformer based preamp if you dont want tube pre.
Biamping gets you the space and depth that the Avalons are known for, and using a tube amp for the highs tames the Titanium dome a bit so its less dry (Triode only, UL amps make it worse), but bi-amping is finicky and too much hassle.
You end up spending all your time adjusting the gain of the bass amps rather than listening to music.
Thats why i gave up on the Ascents. Are your TRLs S100 monos or stereo? If its stereo then you absolutely MUST biamp to deal with Radians.