PROTON 520

It is similar to NAD amps of the same vintage.

Specifications : 
    -: ® :-      1984 vintage
    -: ® :-      Power : 20W RMS at 8 ohms with THD distortion 0.015%
    -: ® :-      Clipping power : at 8/4/2ohms : 27W / 36W / 40W
    -: ® :-      Dynamic headroom : at 8ohms/4ohms/2ohms : 52W / 80W / 100W
    -: ® :-      Damping factor : 90
    -: ® :-      Preamp in / outs    can be used a separate preamp or as a power amplifier
    -: ® :-      Phono : MM / MC  moving magnet and moving coil - rear switched
    -: ® :-      Frequency response : 20 to 20kHz +/- 0.2dB
    -: ® :-      Power bandwidth at THD 1% : 10Hz to 60kHz
    -: ® :-      High level input resistance / capacitance : 40kohm / 220pF
    -: ® :-      Line input sensitivity : VIDEO / tape play: 100mV,   phono MM: 2.5mV,   MC [high/low]: 0.2mV / 0.1mV
    -: ® :-      Residual noise : 0.4mV
    -: ® :-      Channel crosstalk [1kHz] : 90dB / function crosstalk: 80dB
    -: ® :-      Signal to noise [unweighted] : Tape / DAD: 90dB,   Phono MM: 80dB,   MC: 68dB
    -: ® :-      Bass / Treble : +/- 9dB at 100Hz / 10kHz
    -: ® :-      Loudness at -30dB : +6dB at 100Hz,   +3dB at 10kHz
    -: ® :-      Phono input resistance [MM/MC] : 47kohm / 100ohm
    -: ® :-      Phono input capacitance [selectable] : 100pF / 200pF / 320pF
    -: ® :-      Phono overload [MM] at 20Hz / 1kHz / 20kHz : 28mV / 280mV / 2.8V
    -: ® :-      Phono THD at 4.5V output [MM/MC] : 0.01% / 0.03%
    -: ® :-      RIAA response accuracy [MM/MC] : +/- 0.2dB / +/- 0.5dB
    -: ® :-      Speaker outputs : A,   B,   A + B
    -: ® :-      Tone controls : Bass,   Bass EQ  Treble  Loudness
    -: ® :-      Dimensions [ W x H x D ]: 420 x 85 x 210mm
    -: ® :-      Weight : 5.2kg  

FUNCTIONEAZA PERFECT.TRIMIT ORIUNDE CU CE DORESTE CLIENTUL.INTRBATI PE FORUM INAINTE DE A INCHIDE LICITATIA.