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Illuminated pushbutton power switch
Stereo/quad headphone receptacles
Speaker selector switches for main and remote stereo
or quad systems
External Dolby NR/Tape monitor (stereo only)
Stereo/quad tape monitor
Contour
FM muting
High cut filter
Low cut filter
Function selector: Phono, Stereo FM, FM, Discrete FM/Aux, Discrete
phono/Aux, AM
Separate front and back bass and treble tone controls
Mode selector: Mono, Stereo, SQ Matrix, SQ Matrix Blend,
Stereo-to-Quad, Discrete Quad
Ganged Tour channel volume control
Joystick Sound field balance control
Station tuning knob
Illuminated mode indicator lights
Stereo FM indicator light
AM/ FM tuning meter
lluminated dial pointer
REAR PANEL CONTROLS AND FEATURES
Swivel AM loopstick antenna
Thumbscrew connectors for external AM and FM antennas
Dolby NR/Tape Monitor inputs (stereo)
Stereo magnetic phono input receptacles
Four Discrete phono/Aux input receptacles
Four Tape Monitor input receptacles
Four Discrete FM/Aux input receptacles
Two Dolby NR/Tape Monitor outputs
Two sets of tape outputs with 8 receptacles (can record
simultaneously with two recorders in stereo or quad)
Special Quad FM tuner output (single receptacle)
Main and remote speaker outputs for stereo or quad
AC convenience receptacle
Stereo/quad slide switch for double power stereo operation
AC line cord
AC line fuse
Four DC speaker output fuses
Phono grounding terminal
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TUNER SECTION
FM Sensitivity:2.0 microvolts, IHF.
Ultimate Signal to Noise Ratio:70db.
Capture Ratio:2.5dB.
Image Rejection:-50dB.
Spurious Response Rejection:-78dB.
Multiplex Separation:35dB.
Total Harmonic Distortion:0.6% mono. 0.7% stereo.
AM Rejection: -50dB.
SCA Suppression:Totally inaudible.
AM Sensitivity: 200 microvolts/meter.
Image Frequency Rejection: Better than 55dB.
IF Rejection: Better than 55dB.
Selectivity: Better than 34dB.
Dimensions: 16%" W x 15" D x 5" H (less knobs)
Weight: 28 pounds.
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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.
http://manuals.harman.com/hk/Service%20Manual/75+%20sm.pdf
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