Proton D540 stereo amplifier - dark grey :
Features : • 1987 vintage 40W bridgeable stereo amplifier • No remote control
• In 1987 the D540 won "Audio/Video International" magazine's Hi-Fi Grand Prix award • The Proton D540 is driven by dual power supplies with Proton's dynamic power on demand technology, which increases headroom • In a 100 ms test, the amplifier drives 150 watts per channel to an 8 ohm load, 220 watts per channel to a 4 ohm load and 230 watts to a 2 ohm load, which is 6 dB of headroom • The D540 has outputs for two sets of stereo speakers [A and B] • The frequency response curve is from 20Hz to 20 kHz, ± 0.2dB. At the rated power level, the total harmonic distortion is 0.02 percent, and the intermodulation distortion is 0.06 percent • Both distortion levels are so low as to be practically negligible • The damping factor is 90 indicates tight control of difficult speaker loads • The amplifier has a MM / MC phono input, radio tuner, video, digital audio and two tape inputs with multi-directional dubbing • The phono preamp has a switchable setting for low-output MC phonograph cartridges or high-output MM cartridges, as well as three-way adjustable capacitance for setting the response of the preamp • The amplifier is bridgeable, [both channels can be used to drive a common mono load] • The D540 has NAD's anti-clipping circuit
Specifications : -:®:- 1987 vintage -:®:- Power : 40W RMS at 8 ohms with THD distortion 0.02% -:®:- Dynamic Power [at 8ohms / 4ohms / 2ohms, 20ms]: 160W / 280W / 380W -:®:- Dynamic Power [at 8ohms / 4ohms / 2ohms, 100ms]: 150W / 220W / 230W -:®:- Clipping power [at 8 /4 / 2ohms] : 50W / 80W / 100W -:®:- Dynamic headroom : 6dB -:®:- 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 87 x 320mm -:®:- Weight : 8.7kg - packed weight ~ 10kg
SOLD January 2016 on trademe to Kaitaia
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