I must respectfully disagree with you. I've owned all three, albeit briefly, of the ak100ii, ak120ii, and the 240. If I did a blind test, other than pure luck, I'd never pick correctly. I heard absolutely no difference between ak100ii and AK120II, and I tried desperately to hear a difference. I also heard no difference between the 120ii and 240. Volume was slightly lower on the ak100ii. But, those were my findings with my bad ears.
Thanks for your respect.
Perhaps you have answered the point here: "But, those were my findings with my bad ears."
Sure we will have different perceptions...and now we have both views out here too ;-)
I guess the OP's question was about a matching amp for their 240 model...shall we return to this now?