Mike Reed
pfm Member
Have been looking at the various older Rotel power amps (870BX, 970BX,971BX etc. + RB-06 and RB-03).
Apart from the 870BX at (supposedly) 100 w.p.c., the others are either 70 or60 w.p.c. Now, the electricity usage for some, which is really high, seems to suggest class A, but I think not. Regardless, they all seem okay down to 4 ohms, which is the minimum impedance for my 2905s (4 to 20?).
Damping factor is given (around 200) but feedback figures are not, and I believe highish feedback is recommended for ESLs.
Any thoughts, as I want to try s/s power with my EAR 912 pre. and rest up/service my 509s?
For a fair bit more money, I could go Quad 909 which is, I imagine, guaranteed to suit, whether good or not.
Apart from the 870BX at (supposedly) 100 w.p.c., the others are either 70 or60 w.p.c. Now, the electricity usage for some, which is really high, seems to suggest class A, but I think not. Regardless, they all seem okay down to 4 ohms, which is the minimum impedance for my 2905s (4 to 20?).
Damping factor is given (around 200) but feedback figures are not, and I believe highish feedback is recommended for ESLs.
Any thoughts, as I want to try s/s power with my EAR 912 pre. and rest up/service my 509s?
For a fair bit more money, I could go Quad 909 which is, I imagine, guaranteed to suit, whether good or not.
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