Showing posts with label SANSUI. Show all posts
Showing posts with label SANSUI. Show all posts

21 August 2021

Sansui SP-20000 (1973) - Precision Enginereed

loudspeaker

Sansui has three good things (and one bad thing) to tell you about the SP-20000 three-way, floorstanding speaker system introduced in 1973. First, the bad thing: if you play bad music through it, you hear bad music from it. What could be more fair ? The SP-20000 is a full-bodied speaker system entirely without a "personality" of it's own. That's good. The sound waves it puts out are exact conversions of the electrical impulses it receives from your amplifier or receiver. Thus, good or bad, the material you feed it is reproduced accurately and objectively as the medium of high fidelity can achieve. When you hear the results you'll definitely agree that this is good thing number one. Good thing number two is the fact that two of its three active speaker drivers employ a revolutionary Sansui development called the Direct-Drive Ring Diaphragm - or DDRD for short - to improve phase response, transient response and frequency response. The tweeter and midrange units in the SP-20000 are the first commercially available speakers to use this unique system where the voice coil is the diaphragm, and vice versa. Good thing number three is that the total design of the SP-20000 is integrated right down to the most minute detail. A precision-engineered "passive radiator" woofer is included to smooth and enrich the lows. The crossover and level control system is accurate and extremely flexible. The long-excursion, free-surround woofer is capable of very flat (linear) response at all input levels with reduced intermodulation distortion. And to wrap it up, the SP-20000's sensitivity (93dB/m/W, which is high but not too high) means that inputs from the exceptionally big peak of 100 watts clear down to low-power signals are handled efficiently at any listening level. 

The clean and linear musical reproduction of the SP-20000 goes for any kind of music, from bubblegum to Bartok and from jug bands to symphonies. Sansui markets the SP-20000 by the pair, the right-channel unit is a mirror-image of the left-channel unit in terms of speaker placement. Each matched pair of SP-20000 comes with a pair of two-way speaker stands of attractive and strong aluminum tubing. Speakers may be positioned flat or on a slght angle. Technical data: Woofer - 255 mm cone, Passive radiator - 255 mm cone, Midrange - 90 mm horn, Tweeter - 40 mm horn | Power rating 100 W (Max.) | Impedance 8 ohms | Sensitivity 93 dB/W | Frequency range 25 to 40,000 Hz | Crossover 1.500Hz, 7.000Hz 12dB/oct. L-C parallel type | Dimensions without stand 376 W x 786 H x 320 D mm | Weight 30 kg.

loudspeaker

loudspeaker

loudspeaker

loudspeaker

loudspeaker

loudspeaker



20 June 2021

Sansui (1978) TV ad.


Sansui Hi-Fi (1978) TV ad. 
Beautiful Engineering. 
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06 June 2020

Sansui SD-7000 (1973) - Grade Up Your Stereo


Sansui SD-7000

As a result of three years of intensive research and development work and ten prototype models, in 1973 Sansui introduced the SD-7000, the ultimate answer to just what a true high fidelity stereo tape deck should be. A wide dynamic range, wide frequency response range, high signal-to-noise ratio, low distortion and automatic reverse, repeat, rewind and shut-off operations are just af the many outstanding features of the SD-7000. The SD-7000 is a 3-motor, 4-head Auto-Reverse, 4-track 2-channel stereo/mono recorder. Automatic repeat, reverse and rewind operations can be triggered either by fixing strips of sensing foils at the end of a tape or recording the 20Hz reverse signal the deck is equipped with. Unlike other tape recorders where the capstan pulls the tape across the heads and the supply reel provides back tension, the SD-7000 capstan is located before the head assembly and tape tension is provided by the take-up reel. Specifications: Reel size 7" maximum - Tape speed 19cm/s and 9,5cm/s - Heads: Erase, Record, Forward playback, Reverse playback (4-track 2-channel) - Frequency response 15-25,000 Hz @ 19cm/s - S/N ratio Better than 60db - Dimensions: 435 (W) x 535 (H) x 260 (D) mm - Weight: 27 kg.

Sansui SD-7000

Sansui SD-7000

Sansui SD-7000

Sansui SD-7000

Sansui SD-7000

Sansui SD-7000

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12 June 2019

Sansui G-22000 / G-33000 (1978) - Only HiFi, Everything HiFi

hifi receiver

Each Sansui receiver was crafted with meticulous care. The Sansui G-33000 and G-22000 were two from the top of Sansui's "Pure Power Receiver" roster featuring the world's best audio amplifier performance. Both are very powerful, with the only difference between in actual power output, and both are as versatile as any receiver from this era. Circuitry is ultra-advanced with revolutionary Diamond Differential DC (Sansui pat.): this allows power amplifier to achieve low TIM distortion / high slew rate / fast rise time to respond to pulsive, musical signals with superb accuracy. Frequency range also benefits - widened to zero Hz (DC) to 300kHz! 

The "Straight DC" design means phono equalizer, flat amp and power amp are all of DC design. Both models also have a unique "separable" two-unit construction, one is the tuner / preamp while the other is the power amp. This allows you to arrange them as you like, side by side, one on top of other or you can join them together back to back for a singular unit. Technical data: Power output 300 W/ch (min. RMS, 8 ohm, no more than 0.009% THD - G-33000) 220 W/ch (min. RMS, 8 ohm, no more than 0.009 THD - G-22000) Dimension: 636 W x 227 H x 553 D mm (G-33000 / G-22000) Weight 45.4 / 42.1 kg (G-33000 / G-22000)

hifi receiver

hifi receiver

hifi receiver

hifi receiver

09 January 2018

19 Stereo Consoles - Made in Japan


In the early days of Home Stereo it was a custom that all the components were housed in a single unit having the shape and design of a piece of furniture. This trend started where High Fidelity was born, namely in America. Japanese manufacturers were quickly adapting to this trend and created a series of Console Stereo during the 60's. Here are some fine examples from well known manufacturers featuring both Stereo and Quadraphonic (early Surround) systems.


COLUMBIA DSC835 (1964)
COLUMBIA DSC835 (1964)

NATIONAL (1964)
NATIONAL (1964)

ONKYO MC-2200 (1968)
ONKYO MC-2200 (1968)

PIONEER PSC-1 (1960)
PIONEER PSC-1 (1960)

PIONEER PSC-5A (1961)
PIONEER PSC-5A (1961)

SANSUI APS-530 (1965)
SANSUI APS-530 (1965)

Technics SC-1600 (1969)
Technics SC-1600 (1969)

TOSHIBA MEISTERSINGER NO20 (1964)
TOSHIBA MEISTERSINGER NO20 (1964)

VICTOR STL-3 (1959)
VICTOR STL-3 (1959)

VICTOR STL-661 (1963)
VICTOR STL-661 (1963)

VICTOR STL-690M (1967)
VICTOR STL-690M (1967)

VICTOR STL-740MG (1966)
VICTOR STL-740MG (1966)

QUADRAPHONIC Consoles

SANSUI Q-2000 (1971)
SANSUI Q-2000 (1971)

VICTOR DF-11DX (1974)
VICTOR DF-11DX (1974)


19 January 2017

PCM Adapter - Old Digital Audio Format

Before the introduction of a standardized format to record digital audio to a tape (the DAT recorder) the practice was  to use a PCM adapter (pulse code modulation) connected to a video recorder to record the digital audio signal to tape. The PCM adapter was connected to a video recorder using the video in/out of the unit in order to record the PCM coded audio digital signal where normally the video signal is recorded. The reason to do this was that a linear tape recorder did not have sufficient bandwidth to record large volumes of PCM data while video recorders were available both for studio and home use and the rotary video heads used in a video recorder had sufficient bandwidth to do this. Most video-based PCM adaptors record audio at 14 bits quantization, and a sampling frequency of 44.056 kHz.

pcm adapter
PCM connection diagram

First generation PCM adapter

pcm adapter
SONY PCM-1 1977

pcm adapter
Technics SH-P1 1979

pcm adapter
DIATONE PCM

pcm adapter
SHARP RX-1 VC-6300 1979

Commercial models

pcm adapter
Aurex XD-80 1981

pcm adapter
Aurex XD-60 1981 (right)

pcm adapter
DIATONE D-102 1982

pcm adapter
SONY PCM-F1 1981

pcm adapter
Technics SV-100

pcm adapter
SONY PCM-501 1984 / 553ESD 1985 / 701ES 1984

pcm adapter
Sanyo PLUS 5

pcm adapter
Sansui PC-X1 / PC-X11 1988

Dedicated audio players using VHS video tape

pcm adapter
Technics SV-P100

pcm adapter
HITACHI PCM-V300 1982

VCR with PCM audio

pcm adapter
Aurex TOSHIBA PCM-D1

pcm adapter
Aurex TOSHIBA PCM-D1

Prerecorded PCM audio on VHS tape

pcm adapter
Mobile Fidelity Sound Lab prerecorded PCM (digital) audio on VHS

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