E.A.R 509 MK I Monoblocks Second-hand.
legendary Tim de Paravicini Mono-Amps 509
perfect condition!
perfect sound!

technical data:
Power Output (20Hz-20KHz<0.25% THD into Rate Load)...100W
Frequency Response 8Hz-30KHz............+0-1dB
Frequency Response 3Hz-80KHz..........+0-3dB
Power Bandwidth -3dB,0.5% THD.......12Hz-60KHz
I.M.D. at any level from 100mW-100W equivalent power...<0.2%
Output Damping Factor (0.4ohm + 4uH)....20
Signal to Noise Ratio down from 100W.......96dB
Input Sensitivity (Unbalanced).........1.2V
Input Impedance (Unbalanced).........25Kohm
Power Consumption ...................180V.A.
Weight .....................18kg
Size 12"(30cm)W........10"(25.4cm)D.......6"(15cm)H