22 May 2019

SONY TC-R7-2 (1977) - Two Track Magic

reel to reel

Sony's hi-fi components line has to be heard to be believed. With the lowest wow and flutter of any deck Sony ever built, a duo of tape recorders were introduced in 1977. These were the Japanese market SONY TC-R6 and SONY TC-R7-2. The same models were available worldwide as SONY TC-765 and SONY TC-766-2. They both share the same construction but while the R6 is a 4 Track Stereo Recorder running at 9.5 and 19 cm/s the R7-2 is a 2 Track Stereo Recorder running at 19 and 38 cm/s with an additional 4 Track head for playback. The SONY TC-R7-2 achieves an incredible wow and flutter of 0.018% (WRMS) at 38 cm/s and 0.04% (WRMS) at 19 cm/s. This is achieved via a Closed Loop Dual Capstan Tape Drive System. One capstan extends from the motor shaft itself, eliminating intervening gears that can hamper speed accuracy. The other tape drive capstan connects through an extremely steady belt-drive inertia wheel. For a "mirror image" of the original signal, Sony's exclusive Phase Compensator Circuit comes closest achieving this by rectifying phase distortion and producing sound qualitty virtually identical to the original source.

​Illuminated, calibrated and ultra-clear for best monitoring possible, Sony's Professional Studio Standard VU meters are identical in size, shape, color and sensitivity to those on professional consoles. Because of Sony's outstanding Ferrite & Ferrite Heads, plus the remarkably precise fabrication and alignment of the head gap, recordings retain exact positioning of signal throughout the stereo field. The "location" of individual sounds won't wander. There's no annoying phase shift. More professional features include direct-coupled playback FET amplifier, flashing Standby Signal, Punch-in Record and solenoid-operated Logic-Controlled Transport Functions to let you move instantly to and from any mode without stopping. Standard equipment: RM-30 full-function remote control unit with record mute and hinged head cover.



reel to reel

reel to reel

reel to reel

reel to reel

reel to reel

reel to reel

16 May 2019

Technics micro series (1981) - Compact, Powerful, High-Fidelity

micro HiFi

These wonderfull Technics micro components were introduced in 1981. On some markets they were called "micro series" while on other markets they were sold as "Concise Component Series" There were several models available and the one we are focusing here shows a set composed of a SU-C04 amplifier, ST-C04 tuner and RS-M07 cassette deck. Attractive, yet totally compact and powerful, Technics micro series combines easy operation with incredibly advanced, microchip technology to bring out the ful excitement of all your favourite music. Technics has included New Class A power amp circuitry in the SU-C04. New Class A assures you plenty of clean power by combining Class A sound with Class B efficiency. The SU-C04 delivers 30 watts per channel continuous RMS both channel driven into 8 ohms, from 20 Hz to 20 kHz, with no more than 0.007% Total Harmonic Distortion. The matching ST-C04 Quartz Synthesizer tuner has a preset tuning capability of up to 6 FM and 6 AM stations. The Technics RS-M07 cassette deck is using a soft touch controlled mechanism with MX heads and auto tape selctor for normal, CrO2, and Metal tapes. One interesting observation however - there were two versions made under the M07 model number, one had needle type VU meters while the other was using fluorescent type VU meters. All components are 297 mm wide and 230 mm deep and were available with silver or black front panel. 


micro hifi

micro hifi

micro hifi

micro hifi

micro hifi

micro hifi

11 May 2019

STUDER D731 (1993) - For Professionals by Professionals

cd player


The D731 is part of a succesfull studio CD players that started with the introduction of the Studer A730 in 1988. Several upgrades have been made to this initial model and in 1993 there was introduced the D731 and the corresponding D730 rackmountable version. The CDS Series are a STUDER and PHILIPS Development product for studio use. In professional audio applications the reliability is of utmost importance. The best technical specifications have only theoretical value if a unit breaks down during on-air operation or if does not survive a shaky tip in an OB van. This applies to CD players as well. The moderator or DJ must be able to rely on the editing and display precision if the music program or show is to become a flawless performance. Highly rigid die-cast aluminum alloy chassis are used wherever the precision and long-term performance to the original specifications is important. The basic chassis of the new CD-drive mwchanism has a sufficiently large mass for excellent shock resistence, but small moving mass for excptional responsiveness. The drive principle has remained unchanged: Balanced linear drive with play-free, low-friction bearings - in other words the well-proven moving coil principle in its most advanced design. 

The STUDER D730 compact disc player can also be flush mounted into a console while the D731 can be rack mounted. Both are based on the same technology and their operating ergonomy and display concepts have been devised so as to make them practically identical for both units. Initially conventional CD players had problems not only with the SKIP functions but also with playing back CD-Rs (a new technology back then) that have not been completely recorded, i.e. without TOC. On the STUDER D730 and D731 such CD-Rs can be played without difficulty. In a quick scan they create a table of contents in memory and then play the CD-R without TOC. The CD players can be controlled from a PC via the RS232 interface, whereas the parallel interface supports various versions from simple controls up to external full-key pads. A parallel remote control with or without display used for the A727 or A730 CD player can also be connected to the D731/D731. Audio outputs are available for direct digital connections (XLR) and for analog signals in transformer balanced (XLR) and unbalanced (cinch) configurations. The format of the digital output can be configured according to AES/EBU as well as SPDIF.


cd player

cd player

cd player

cd player

cd player

cd player