I cannot answer your question directly but I can give you some guidance - select a power amp that has input impedance greater than 10K Ohms. The ARC Ref3 has an output impedance of 600 Ohms which does not work well with lower input impedance power amps. The bass is not well-controlled (flabby).
which non ARC poweramp do you use with ARC REF 3
Which non ARC poweramp do you use with ARC REF 3 and why .I will start myself , in the Netherlands you can 't make an audition for the REF 210 or 610 as no dealer has this gear in house.You simply have to order special for you at the importer if you would own one .So I will believe the poweramps are as good as the importer promisses , but I had the "luck "to try at my own home the BAT VK 1000 monblocks, and they stayed here.I listen with the CD7 , PH5 and B & W 800N loudspeakers.