DENON PMA-890DG (1989) | Real time audio technology

 

The Denon PMA-890DG was a high-end integrated amplifier, combining advanced digital processing with sophisticated analog amplification in a premium audiophile design. It features a real 20-bit Super Linear Converter (S.L.C.) with independent left and right D/A converters, processing 20-bit 8x oversampled digital signals for highly accurate conversion and exceptional sound quality. Its intelligent digital interface automatically recognizes the sampling frequencies of CD, DAT and satellite digital broadcasts, while a dual-PLL clock system effectively suppresses jitter to ensure precise, detailed digital playback. The amplifier is built around Denon's P.B.S. (Penta Block Separated) chassis, which isolates the power supply, digital circuitry, display and audio stages into dedicated sections to minimize interference, reduce vibration and improve overall signal integrity. The power amplifier employs Denon's innovative Optical Class A circuit, separating the bias control from the audio path through optical transmission for greater purity and lower distortion. A multi-stage differential amplifier with ultra-low-noise FETs drives a high-speed parallel push-pull output stage, delivering excellent transparency, dynamic range and effortless control over demanding loudspeakers. A massive 6.3 kg shielded power transformer, premium rectification components and a high-current Pure Dynamic power supply provide outstanding transient response and stable power delivery. Additional features include a high-quality MC/MM phono stage with DC servo circuitry, Source Direct mode, broadband tone controls, speaker relay switching and a high-speed protection circuit. Available in an elegant gold finish with real wood side panels or a classic black version, the Denon PMA-890DG remains one of Denon's most desirable late-1980s integrated amplifiers, admired for its advanced engineering, refined sound quality and timeless design. Specifications: 2x110W (8 ohm) | THD 0.004% (20-20.000Hz, 8ohm) | Frequency characteristic 4Hz to 150kHz | Dimensions (W/H/D) 470x181x420mm | Weight 19,4kg | Original sale price in Japan ¥ 93,800

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Technics RS-AZ7 (1996) | Amorphous-Z

 

The Technics RS-AZ7 is one of the most innovative cassette decks ever produced, distinguished by its groundbreaking Amorphous-Z playback head. Developed from Digital Compact Cassette (DCC) technology, this world-first analog thin-film MR (magnetoresistive) head replaced the conventional coil design with an advanced magnetic sensing element, delivering exceptional signal-to-noise ratio, ultra-wide frequency response, outstanding channel separation, and remarkably low distortion. Its precision-engineered 0.5 μm head gap and thin-film construction significantly improve high-frequency detail while eliminating many of the low-frequency limitations and contour effects associated with traditional playback heads. The compact detection structure also minimizes crosstalk, reduces monitoring interference, and improves compatibility with pre-recorded tapes, resulting in exceptionally accurate and natural sound reproduction. To maximize playback quality, the RS-AZ7 includes a Play Direct mode that routes the playback head output directly to the amplifier, providing an even cleaner signal path when Dolby noise reduction is disabled. Recording performance is equally impressive thanks to a permalloy recording head, a double-gap ferrite erase head, and Technics' advanced Linear Magnet Field Class AA recording amplifier, which combines voltage and current amplification for greater magnetic field accuracy and faithful signal transfer. A high 210 kHz bias frequency, Virtual Battery Operation Circuit, and Dolby HX Pro further enhance recording precision by reducing noise and extending high-frequency performance. The deck also features Automatic Tape Calibration (ATC), which analyzes tape characteristics at 400 Hz, 3 kHz, 10 kHz, and 15 kHz before automatically optimizing bias, recording sensitivity, equalization, and level settings for each cassette. Additional features include Dolby B and Dolby C noise reduction, ultra-fast 70x FF/REW capable of winding a C-60 cassette in approximately 35 seconds, power-assisted cassette loading, MPX filter, memory stop, wireless remote control, and the vibration-resistant THCB (Technics Hybrid Construction Base) chassis with a high-density hybrid front panel. Combining pioneering head technology with sophisticated electronics and premium mechanical construction, the Technics RS-AZ7 remains one of the most technically advanced and highly regarded cassette decks, delivering audiophile-grade playback and recording performance that continues to impress enthusiasts and collectors alike. Specifications: Heads:  Recording head (Permalloy) x1, Playback head (AZ Thin-Film) x1, Double-gap ferrite erase head x1 | Motors: DC capstan motor (belt drive), DC motor reel | Wow and Flutter 0.07% (WRMS) | Frequency response: 20-17.000Hz Type I, 20-18.000Hz Type II, 20-23.000Hz Type IV | Dimensions (W/H/D) 430x125x290mm | Weight 4,2kg | Original sale price: ¥59,800 Japan, 700 DM Germany 

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AIWA VX-T14S (1991) | Hi-Fi Stereo

 

The VX-T14S was a stereo TV with built-in Hi-Fi Stereo video recorder. The TV section was equipped with a Trinitron® cathode ray tube, renowned for its high image quality. (Trinitron is a registered trademark of Sony Corporation). If left in standby mode, simply insert the tape with the tab broken, and it will automatically turn on the TV and start playback. No complicated button operations required. Anyone can enjoy watching videos instantly. The on-screen display makes setting functions easy. You can set timer recording, morning timers, and sleep timers while viewing the settings on the screen. The on-screen display also shows channels, volume, stereo, and audio multiplexing, ensuring accurate function settings. The unit is also equipped with a variable audio output terminal for connecting amplified speakers, and video/audio input/output terminals for dubbing. This will reproduce high-quality sound through the built-in amplifier and speakers. The volume can be adjusted with the remote control. It also features a power outlet that is linked to the main unit's power switch for connecting speakers or a dubbing deck. The SC-B10 optional speakers feature a built-in amplifier and ProSound BBE and DSL deep bass circuitry to reproduce powerful sound. AIWA VX-T14S Specifications: <TV Section> CRT: 14-inch Trinitron CRT, Color System: NTSC, <Video Deck Section> System: 2-head helical scan VHS system, Hi-Fi FM audio system, Tape Speed: Standard/3x 2 speeds, Recording and Playback Supported, Timer Recording: 4 programs/1 year, DATA Recording: Possible, QTR: Possible (15-minute intervals, up to 9 hours 45 minutes), Also functions as OFF TIMER, <Common Section> Number of Tuners: 1, Reception Range: VHF 1~12CH, UHF 13~62CH, Supports Multiplex Audio Broadcasting (Split Carrier System), Number of Preset Stations: 12, Audio Output: 1W + 1W (8cm speakers x 2), Power Consumption: 95W, Power Supply: AC100V, 50/60Hz, ON TIMER: Within 24 hours (once) or daily fixed start, OFF TIMER: 15-minute intervals, up to 9 hours 45 minutes, On-Screen Display (OSD): CH, Clock, VTR Mode, Polorium, etc. Front Input: Video/L/R, Front Output: Headphone jack (3.5), Rear Input: AC (Detachable AC cord used), ANT IN (F connector, U/V integrated 752), Rear Output: Video/L/R, L/R (Variable), AC100V (100W MAX, TV linked), <Accessories> Remote controller (RC-T200), Dry batteries (AA x 2), Instruction manual, Warranty card, Antenna connector (300/752 compatible type), AC cord (length approx. 2.0m), <Dimensions> External dimensions: approx. 368(W) x 396(H) x 405(D) mm, Screen dimensions: 277(W) x 208(H) x 340(diagonal) mm, <Weight> approx. 16.4kg

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