17 October 2021

Technics RS-1800 (U-76) (1978) - Professional in Every Sense of the Word

reel to reel

After the introduction of the initial 3 "Isolated Loop" models (RS-1500/1506/1700) Technics decided to create the Ultimate Isolated Loop model, this was the RS-1800 (U-76 in Japan). With this new model Technics added a new tape speed - 76 cm/s (30 ips). The RS-1800 has 3-speed operation capability: 76 cm/s. 38 cm/s and 19 cm/s and can be used for 2-track recording/playback and for 4-track playback. The faster tape speed is also beneficial from the point of view of tape transport stability: wow and flutter of less than 0.010% WRMS (0.02% DIN) and tape speed deviation of less than +/-0.08% at 76 cm/s. Such high performance specifications as these are, quite naturally, supported by the 3-motor Direct Drive system used since the RS-1500, a Quartz-Locked capstan motor and dual reel motors with a tape tension control system. The RS-1800 also features pitch control with quartz-locked accuracy at all setting that are Digitally displayed by LED's, together with, at the same time, rated speed setting. The same display will also show elapsed tape transport time indicated in hours, minutes and seconds. The "Auto-Play" function is especially convenient to playback a master tape, which is usually wound up when it "tails out". In order to obtain the maximum potential from the extended high-frequency response of the 76 cm/s tape speed, the 2-track recording head, the 2-track playback head and the 4-track playback head of the RS-1800 use the SX (Sendust Extra) type of head. 

The RS-1800 is a two box unit where the upper section contains the tape transport while the lower box is the amplifier unit. The unique feature of the amplifier unit, and the most practical feature as well, is this capability for automatic adjustment of bias and equalization. If the bias/equalization selector is set to "auto" position during tape movement in recording mode, the LED lamp illuminates in red, a 1 kHz test tone is generated and the automatic adjustment of the bias begins. After about 15 seconds the equalization is then automatically adjusted, and the lamp flickers during this period. When both of these adjustments have been completed, the color of the LED will change to green. This setting will be retained in the memory, even if the power is turned off, until the selector is set to the "manual" position. An oscillator is also provided separately for manual adjustments which can be made in 4 steps. The playback equalizer is adjusted to conform to NAB standards, but there is also a 2-position selector on the rear panel of the transport unit for IEC standards. Technical specifications: Wow and flutter: 0.01% WRMS at 76 cm/s | Frequency response: 30-35.000 Hz (+/-3 dB 76 cm/s) - 30-30.000 Hz (38 cm/s) - 30-25.000 Hz (19 cm/s) | Signal-to-noise ratio 62 db at 76 cm/s | Transport: 500x443x347 mm / 36kg | Amplifier: 500x223x389 / 16.6kg. | Original sale Price: 15.000 DM in Germany, 950.000 Yen in Japan. (Optional RP-070 infrared remot control.)

reel to reel

reel to reel

reel to reel

reel to reel

reel to reel

reel to reel

reel to reel

reel to reel
Technics 10000 Series




10 October 2021

Bang & Olufsen Beocord 9000 (1982) - World's Most Advanced Cassette Deck

cassette deck

To hear music reproduced accurately on cassette in your home is one pleasure serious listeners have always been denied until the introduction of the Beocord 9000 in 1982. With the Bang & Olufsen Beocord 9000 you can faithfully reproduce the wide dynamic range of a live performance. So much that it's impossible to pick the difference between the record and recording. The Beodord 9000 incorporates a unique Computer Controlled Calibration system, the Bang & Olufsen HX Professional Recording System and single touch operation. The Beocord 9000 calibrates to any cassette before recording in just nine seconds. Bang & Olufsen have developed a Computer Controlled Calibration system which optimises the performance of any tape. Simply insert any tape and the Beocord 9000 proceeds to set the appropiate bias, sensitivity and equalisation. The specifications for types of tape you use frequently can beplaced in the memory and recalled instantly making future calibration unnecessary. And that's not all, in the calibration process the Beocord 9000 also measures distortion and sets its record level meters according to the characteristics of the particular tape you are using, assuring you of a recording free of audible distortion. 

The Beocord is one of the first cassette decks in the world to incorporate HX Professional. Not since the invention of Dolby NR has such a significant inprovement in cassette performance taken place. Even Dolby Laboratories agreed. Overall dynamic range is increased by up to 10dB. Definition of bass frequencies is audibly superior. Frequency response with any tape is +/-1.5dB from 20 to 20000Hz with a S/N ratio up to 80dB with Dolby C NR!. The Beocord 9000 provides an electronically accurate real-time index to all tape locations regardless of type or lenght. To calibrate any cassette to a real-time index, simply press the GO button on the control panel. The most important part of the system is the micro-computer. The micro-computer carries out all calculations and controls the minute and second readings on the display. The computer program contains 3 tables, one for tape thickness compiled on the basis of practical experience. (Large number of cassettes on the market have been carefully measured at the Bang & Olufsen laboratory to ensure accurate time indication). If that's not enough, the Beocord 9000 is furnished with a specially recorded test tape which permits you to verify the accuracy of the tape head's azimuth adjustment. The fabulous design belongs to Jakob Jensen. Technical data: Wow and flutter: 0.045% WRMS | Frequency range: 20-20,000 Hz +/-1.5dB (All Quality Types), Metal 10-25,000 Hz +/-3dB | Dimensions: 53x13x30cm | Weight: 7.8 kg

cassette deck

cassette deck

cassette deck

cassette deck

cassette deck

cassette deck

02 October 2021

TEAC R-999X (1984) - The Super Analog Reverse Master

cassette deck

The R-999X introduced by TEAC in 1984 is a cassette deck format which achieves the convenience of auto reverse without compromising recording and playback quality. The challenge was in finding a way to maintain close-to-identical recording and playback performance in both directions, for both sides of the tape. After exhaustive research and development the unique Acculign Rotating Head System was developped, a system as different from ordinary rotating types as night is from day. Using Teac's own Cobalt Amorphous (CA) Rec/Play heads along with source/tape monitoring in the three-head configuration on a diecast base, the rotating head assembly with ceramic stoppers is mounted on an exteremely precise dual micro-bearing. This high-precision system maintains almost perfectly identical performance in either tape direction. 

In the interest of the best possible mechanical performance the R-999X features a 6-motor mechanism in a Bi-Directional Symmetrical Transport. This auto-reverse model uses two FG servo-controlled brushless DC direct-drive (DD) capstan motors with heavy flywheel for unfailing speed accuracy in either direction. It also uses two tension servo-controlled corelss DC direct-drive (DD) motors for reel tension servo control, and two motors for support functions. TEAC's Manual Calibration System offers considerable level and bias adjustment flexibility, a real advantage to those seeking optimum recording quality. The R-999X is provided with independent controls and a test-tone generator for exact adjustment of bias and level (sensitivity) for both left and right channels. A 4-bit microprocessor-operated CPS (Computomatic Program Search) system is responsible for various memory, search and repeat functions. The R-999X is equipped with double dbx and Dolby B/C noise reduction systems but it also features dbx disc decoding as well (for dbx encoded vinyl records). Technical data: Wow and flutter: 0.025% (WRMS) | Frequency response (-20 dB): 20-22,000/21,000/20,000 Hz (Metal/chrome/normal) | Dimensions: 432x119x350 mm | Weight: 8.5 kg.

cassette deck

cassette deck

cassette deck

cassette deck

cassette deck

cassette deck

cassette deck

cassette deck