Accuphase Class A or A/B speaker match Dynaudio C1

What is the class A output? how big is your room? Honestly, I would say no on the class A only unless it is a huge amp. These speakers really do need a lot of power and anyone telling you that they sound great on their 30 watt tube amp has not heard what they can do with real power. I know there is more to power than watts but I would say that you'll need 150w to make them work in anything other than a shoebox... 300w to make them sing and 500 to make them truly dynamic. Hope that helps.

I am using the boulder 1060 with mine but have used the boulder integrated and some other smaller amps.

I agree with everything said above especially the lower volume issues with these speakers. In a large room I just don't think a smallish amp is gonna cut it. Their impedance when measured was closer to 83 db. It's not a volume issue, anything will play them loud. .... It's a dynamic and subtlety issue that lower current amps cannot provide.