Best amp for Proac response 2.5

proac recommends arc ls-16 or ls-25 preamp along w/arc 100.2 amp...

Bryston 4B-ST.

I have them and run them with a pass aleph 3. widely considered one of the best amps made. It is small but drives them very well. Smooth sound, but plenty of bass punch! Highly recommended! Can probly pick one up used for $1000.00. Or even a aleph 5. It is the same amp just 60 watts instead of 30.

Try the Pass X-150 with your Proacs--an excellent match.

I use the Jeff Rowland Concentra Intergrated Amplifier with my ProAc 2.5 speakers. I suggest you listen and judge for your self. cheers.