Descrizione

sintoamplificatore harman-kardon costruzione americana quadrifonico con pilotaggio a leva come da foto,alimentazione 110v e fornito di trasformatore esterno,collegabili 4 coppie di diffusori,alti e bassi regolabili singolarmente per ogni canale,potenza notevole

Dal web:

Square wave tilt at 20 Hertz is less than 3%.
Exceptionally fast high frequency rise time achieved through use of Citation audio circuitry. Better than 2 microseconds rise time at 20kHz.
Remote and main speaker selector switching in stereo or quad. Provides flexibility for connecting speakers in stereo, or quad in various parts of the home in numerous permutations.
External Dolby noise reduction/tape monitor switch permits user to connect external Dolby NR to system for use with Dolby FM broadcasts, Switch also serves as stereo tape monitor if Dolby NR not employed.
Quadriphonic tape monitor switch provides monitoring for either a quad or stereo recorder.
Contour switch restores low frequencies normally lost at low volume levels.
High and Low out Filters remove annoying hiss and rumble.
Illuminated indicator numerals provide positive identification of the mode of operation. Numeral 1 for mono, 2 for stereo, 4-2-4 for SO matrix quad, 4-2-4 for SO matrix blend, 2-4 for stereo synthesis and and 4-4 for discrete quad.
360° joystick sound field balance control enables user to set stereo or quad sound source anywhere within the listening area. Unquestionably the most versatile control ever designed for a home music system.
Synthesizes all stereo program material (FM, tapes, phono) to pseudoquad through use of Harman/Kardon designed phase-shifting network. Network designed to give spacious, totally transparent sound closely approximating the depth and dimension of the concert hall.
Harman/Kardon ultra-wideband SO matrix delivers superb four channel sound from SO program sources. Model 754- employs two SO positions for maximum flexibility. First position retains exact balance and perspective of the concert hall while second position introduces slight amount of blend in the front channels. This is especially useful for the playback of hard rock and contemporary music or where a soloist is predominant.
Extremely sensitive, low-noise tuner pulls in distant stations with amaz
ing clarity and freedom from noise. Automatic stereo circuit switches
FM section to stereo the moment a stereo FM broadcast is received.
Provision for discrete quad reel-to-reel, or 8-track cartridge deck. Will
also accommodate the new RCA discrete disc system with the addition
of Harman / Kardon's special external discrete phono adapter.
Provision to play back discrete FM broadcasts (when approved for
transmission).

Power Output: 45/45 watts, RMS, both channels driven simultaneously into 8 ohms, 20-20kHz at less than 0.5% THD at 120 volts, 50/60 Hertz AC. (in special double power stereo mode)

4x 18 watts, RMS into 8 ohms, 20-20kHz at less than 0.5% THD at 120 volts, 50/60 Hertz AC. ALL FOUR CHANNELS DRIVEN SIMULTANEOUSLY.
(Power measurements made by the most stringent and conservative standards. If measured by competitive standards, power would be 55/55 in stereo and 4x 23 in quad)
Power Bandwidth: From less than 10 to beyond 40kHz into 8 ohms, all channels driven in stereo or quad mode at less than 0.5% THD.
Total Harmonic Distortion: Less than 0.5% at any power rating from 0.1 watt to full rated power. (Typically runs below 0.2% from 20-20kHz at fulloutput)
Intermodulation Distortion: Less than 0.15% at rated output.
Hum and Noise:Better than 85dB below rated output (unweighted) in stereo or quad mode.
Damping Factor:40:1 at 4 and 8 ohms.
Frequency Response: From below 4 Hertz to beyond 70kHz, ±0.5dB at normal power levels.
From below 1 Hertz to beyond 100kHz ±1.0dB at normal power levels.
Square Wave Tilt:Less than 10% at 20 Hertz. (Typically reads 5%)
Square Wave Rise Time:Better than 2 microseconds.
Stability:Absolutely stable with any type load.
Phono Overload:Greater than 75 millivolts.
Bass and Treble Tone±12db bass boost and cut at 50 Hertz.
Control Action:±12db treble boost and cut at 10kHz.

Specifiche

Tipologia amplificazione	transistor
Potenza RMS per canale	45 W
Carico di riferimento	8 ohm
Stadio phono	MM
Ingressi analogici	Phono stereo, Phono discreto (4 canali), FM discreto/Aux (4 canali), Tape Monitor (4 canali)
Paese di origine	USA
Distorsione armonica (THD)	0.5 %
Risposta in frequenza	4 Hz - 70 kHz
Dimensioni (LxAxP)	419 x 127 x 381 mm
Peso	12.7 kg
Finitura	nero
Alimentazione	110V AC
Anno produzione	anni 1970