Audio Research, AYON and Primaluna tube amplifiers.

Hello Agoners,

May I ask how would these 3 companies stand out from each others?

Can we rank them as for:

1. Sound quality

2. Performance

3. Reliable

4. Reputation.

5. Service and support

6. Resell value.

I’m still very new to tube amps and only had Cayin A-88T and VTL ST-150 in the past.