Well i had some pretty high qaulity stuff with them here is the amps i had with them:Nad 320bbe,Jungson Class A amp,Musical Fidelity 3.2 amp &3.2 preamp,Quicksilver preamp & Monoblocks,Unison Unico with modified Mullard tubes,Ming Da 22 watt intergrated tubeamp with modified GE tubes and Mullards and a Musical Fidelity X-150.Cd players:Musical Fidelity 3.2,X-V3,X-10 tube buffer,X-Dac,X-PSU,Unison cd player with modified Mullard tubes.Speaker wire and interconects,Various Cardus,Audioquest,Zen,and I settled for the Kimber Timbre interconnects and 8TC speakerwire which was the least bright of the bunch,and best at the frequencey extremes,I think thats plenty of gear that should've have worked and I even tried them out on my friends Rogue Zues tube amp and my other friends VTL monoblocks,and they were still bright as hell.