YAMAHA M-2 (1980) | High-fT Power

 

This power amplifier was originally released in Japan in 1979 as the B-5, quickly followed by this international market M-2 with added power level meters. The M-2 is a Natural Sound High-Performance Power Amplifier - The Authority of True Sound. Power alone does not define greatness — control does. The M-2 stands as a testament to Yamaha’s relentless pursuit of sonic truth, where immense output is harnessed with absolute precision. At its core lies an advanced circuit architecture: a low-noise dual FET input stage in cascode bootstrap configuration, seamlessly feeding a current mirror driver and a meticulously engineered three-stage complementary push-pull output. Guided by Yamaha’s exclusive Linear Transfer Bias system, the M-2 achieves what lesser amplifiers cannot—vanishingly low crossover distortion and a purity of tone that remains uncolored, even under the most demanding conditions. Each stage operates in perfect harmony, balancing wide bandwidth performance with carefully applied negative feedback, ensuring that every nuance of the music is preserved intact. Transcending the Limits of Conventional Design. Traditional power transistors, long constrained by thermal instability and switching distortion, have been reimagined. Yamaha’s specially developed high-frequency power transistors defy these limitations, maintaining stability where others falter. The result is a clarity that extends effortlessly into the highest frequencies, free from harshness or strain. Fine detail emerges naturally, supported by a seemingly endless reserve of power—delivered with authority, yet never at the expense of musicality. Linear Transfer Bias — Precision at the Threshold. At the heart of the M-2’s remarkable transparency lies the Linear Transfer Bias circuit. By precisely controlling the operating point of each output transistor, Yamaha eliminates the discontinuities that typically plague push-pull designs. The effect is profound: a smooth, continuous transfer characteristic that virtually erases crossover distortion, particularly in the delicate low-level signals where music breathes and lives. Whether delivering a whisper or a crescendo, the M-2 maintains its composure, its accuracy unwavering. Performance You Can See — Purity You Can Hear. Measured at a demanding 20 kHz, distortion remains extraordinarily low across a wide output range—from a commanding 200 watts down to just 2 watts. Where conventional designs falter at lower levels, the M-2 remains composed, preserving the integrity of even the faintest musical detail. Crafted Without Compromise. In a component of this caliber, nothing is incidental. Every detail, every material, every connection is chosen with singular purpose. A centrally mounted toroidal transformer anchors the design, flanked by massive filter capacitors to ensure optimal energy flow. Signal paths are kept exceptionally short, while thick copper bus bars provide a flawless grounding foundation. Circuit boards feature heavy copper traces for superior current handling, and carefully selected components—from phase-accurate polystyrene capacitors to induction-free resistors—preserve signal integrity at every stage. Gold-plated terminals, precision coaxial cabling, and meticulous internal layout reflect a philosophy where engineering and craftsmanship are inseparable. The M-2 is not merely an amplifier. It is an instrument—designed to reveal music in its most natural, unrestrained form. Specifications: Power rating 200 W/ch (0,005% THD) | Damping factor 200 | Frequency response DC - 100.000 Hz | Size (W/H/D) 435x183x362mm | Weight 23kg | Original sale price in Germany 2590 DM

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AIWA AD-FF8 (1981) | Compu-Brain Calibration

 

The Aiwa AD-FF8 (AD-3800) from 1981 is a stereo Cassette Deck with Compu-Brain Calibration, DX3 Head & Dolby C noise reduction. A rare example of late-generation cassette engineering—where precision automation meets true analog musicality. In an era when cassette technology reached its peak, this stereo deck stands out as a sophisticated combination of intelligent calibration, advanced head design, and refined transport mechanics. Built for serious listeners and recording enthusiasts, it delivers the kind of performance that defines high-end analog. Intelligent Tape Optimization – Compu-Brain System: At the core of this deck is the Compu-Brain automatic calibration system—a microprocessor-controlled feature designed to extract maximum performance from any cassette type. Before recording begins, the system analyzes the tape and precisely adjusts bias, recording sensitivity, and equalization. In approximately 16 seconds, it selects the optimal configuration from over 30,000 possible combinations, ensuring consistent, high-quality recordings regardless of tape formulation. A built-in memory retains the last calibration settings for up to 24 hours, making repeat sessions effortless and efficient. Advanced DX3 Head Technology: Derived from a 3-head design philosophy, the DX head system is engineered for accuracy and durability. Its laminated multi-layer core structure reduces eddy current losses and extends high-frequency response, while improved low-frequency behavior ensures a smooth and balanced sound signature. Premium materials such as Sendust and hardened composite components enhance wear resistance, maintaining performance over time—an essential factor for collectors and long-term use. Dolby Noise Reduction – Clean, Detailed Sound: For noise control, the deck features both Dolby B and Dolby C noise reduction systems. Precision Transport Mechanism: The transport section utilizes a super-stabilized torsion dual capstan system, designed for accurate tape handling and reduced wow and flutter. 

The deck is equipped with a range of features that enhance both usability and recording control:

4-digit fluorescent counter with real-time tape time display (minutes/seconds)

Repeat and memory play functions for flexible listening between defined points

Rec Mute function for precise track spacing during recording

3-color, 16-point peak meter with fast response and peak hold

100 mm long-stroke level controls for accurate recording adjustments

Full Tape Compatibility & Connectivity

Designed to handle a wide range of cassette formulations, the deck includes a 4-position tape selector (LH, FeCr, CrO₂, Metal), ensuring optimal playback and recording across formats. 

Additional features include:

Cue and review functions for quick tape navigation

Switchable MPX filter for clean FM recordings without Dolby interference

Timer standby capability for scheduled recording/playback (with external timer)

Rear-mounted microphone input

Support for optional wired or wireless remote control

Specifications: Wow & Flutter 0,025% | Frequency response (-20VU) 20-20.000Hz | Dimensions (W/H/D) 420x110x265mm | Weight 5,1kg | Original sale price in Germany 1400 DM

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TOSHIBA ARENA BS84TC (1991) | Twin Video

 

The Arena BS84TC from Toshiba is a twin video cassette changer from 1991. It was the World's first BS Hi-Fi S-VHS with a tape changer. It allows for long recording and playback times using two cassettes, and even enables recording and playback while the timer is on standby. It is also capable of receiving sattelite broadcasts. To enjoy BS broadcasting, a separate BS antenna is required. Dubbing and simultaneous recording/playback are not possible on this device. When changing cassettes, recording and playback will be interrupted for about 15 seconds. Twin Cassette Changer: In 3x speed mode, it employs a twin cassette changer that allows two cassettes, A and B, to be loaded simultaneously into a single tray. Since two cassettes can be used consecutively, it is possible to record and play back for up to 18 hours. Long satellite broadcast programs can be recorded in their entirety with ease, and if you switch to the second cassette, B, you can even perform "just recording" to end the recording precisely at the end of the tape. Furthermore, by using cassettes A and B separately, it enables new ways of using video that were not possible with conventional video equipment, such as recording and playback on cassette A while cassette B is in timer standby mode. Built-in high sensitivity BS tuner: Even if it rains, the system automatically detects the signal level, allowing you to enjoy beautiful, low-noise video. For example, when you set a timer, you can record at the optimal image quality regardless of the weather during recording. Not only can you record terrestrial broadcasts while watching BS/satellite broadcasts on your BS monitor, but you can also enjoy your favorite satellite channels with a single touch while the timer is in standby mode, maintaining the timer state.

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