What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Sansui 5900Z

 The Sansui "Z" Series - The Realization of Great Expectations

Music lovers expect uncommon products from Sansui. And Sansui delivers. The Sansui "Z" Series of synthesized digital receivers are designed and bulit with a loving logic that can be seen, touched and heard. Thae the Sansui 5900Z, a reasonably priced receiver with every important feature you could possibly want for the heart of your high fidlity system.
 Synthesized Digital Tuning
You can't mistune a Sansui synthesized digital receiver. Not even a little. Press the up/down tuning buttons. The digital circuitry ensures that every station received is automatically locked in for lowest possible distortion, with its frequency indicated both on a digital readout and by an LED indicator along an analog type dial.

Touch Volume Control and LED Peak Power level Indicator
The Sansui 5900Z uses a pair of touch-buttons to adjust the listening level. Relative volume control setting is indicated on a fluorescent display. Actual peak power amplifier output is shown by 14-segment LED indicators.
 12 preset Stations
To make FM and AM tuning still easier, up to 12 user-selected stations may be "stored" in the 5900Z's memory circuits for instant recall. The last station received will be remembered when the tuner is turned on again, and memories are kept "live" even during a power outage.

DC Servo Amp for Dependable Power
The leader in DC technology, Sansui uses a servo-controlled amplifier circuit in all "Z" receivers to eliminate unwanted ultra-low frequencies - like record warps - while maintaining the advantages of direct-coupled circuitry in their amplifier sections. The 5900Z delivers 75 watts/channel, min. RMS, both channels into 8 ohms, from 20 - 20,000 Hz, with no more than 0,03% THD.
And there's more. Like LED's for every important function. Two Muting Modes. Two tape deck connection with dubbing. And much more.
Audio Section
Power Output:  75 W per channel into 8 Ω (min. RMS both channel driven, 20-20,000 Hz, with no more than 0,03% THD)
Load Impedance:  8 Ω
Total Harmonic Distortion:  less than 0,03% (at or below rated min. RMS power output)
IM Distortion (60 Hz - 7 kh = 4:1 SMPTE method):  less than 0,03% (at rated power output)
Frequency Response (at 1 watt)
Overall (from AUX):  5 to 100,000 Hz, +0 dB, -3 dB
RIAA Curve Deviation (Phono, 20 Hz - 20 kHz):  ±0,3 dB
Damping Factor (20 Hz - 20 kHz, both channels driven):  40 into 8 Ω
Input Sensitivity/Impedance (at 1 kHz):
Phono :  2,5 mV/47 k Ω (max. Input capability: 180 mV at 1 kHz, less than 0,1% THD)
Tape 1, 2 Play :  150 mV/ 47 k Ω
Aux :  150 mV/47 k Ω
Output Level (at 1 kHz)
Tape 1, 2 Rec :  150 mV into 47 k Ω
Signal-to-Noise Ratio (short circuit, A-network)
Phono :  80 dB
Aux  :  95 dB
Channel Separation (at 1 kHz)
Phono ;  50 dB
Aux :  60 dB
Bass :  ±10 dB at 50 Hz
Treble :  ±10 dB at 10 kHz
High Filter :  -3 dB at 5 kHz (6 dB/oct)
Loudness (Volume  -30 dB position): +8 dB at 50 Hz; +6 dB at 10 kHz
Audio Muting:  -20 dB
FM Section
Tuning Range:  88 to 108 MHz
Usable Sensitivity IHF [mono/stereo]:  10,8 dBf (1,9 µV)/21 dBf
50 dB Quieting Sensitivity [mono/stereo]:  15 dBf / 37 dBf
Signal-to-Noise Ratio [mono/stereo]:  76 dB / 70 dB
Distortion (at 65 dBf)
Less than 0,3% at 100 Hz
Less than 0,15% at 1, 000 Hz
Less than 0,4 % at 6,000 Hz
Less than 0,3% at 100 Hz
Less than 0,18% at 1,000 Hz
Less than 0,4% at 6,000 Hz
Alternate Channel Selectivity (at 400 Hz):  60 dB
Capture Ratio:  1,0 dB
Image Response Ratio:  50 dB
Spurious Response Ratio:  70 dB
IF Response Ratio:  90 dB
Stereo Separation:
30 dB at 100 Hz
40 dB at 1,000 Hz
28 dB at 10,000 Hz
Frequency Response:  30 - 15,000 Hz (+0,5 dB; -1,0 dB)
Hum and Noise(at 65 dBf):  70 dB
Antenna Input Impedance [balanced/unbalanced]:  300 Ω / 75 Ω
AM Section
Tuning Range:  530 - 1,600 kHz
Usable Sensitivity (bar antenna):  53 dB/m
Selectivity (±10 kHz):  30 dB
Signal-to-Noise Ratio:  43 dB
Distortion (at 30% Modulation, 80 dB/m):  less than 0,5%
Image Response Ratio:  40 dB at 1,000 kHz
IF Response Ratio:  35 dB at 1,000 kHz
Power Requirements:  120, 220, 240 V; 50/60 Hz
Power Consumption:  280 watts, 350 VA (max. 350 watts)
Dimensions (W x H x D):  485 x 138 x 313 mm (19-1/8" x 5-7/16" x 12-3/8")

Weight (net):  9,5 kg (20,9 lbs)

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