SONY TC-K555ESR (1988) | High BIAS

 

Building upon its predecessor, which set a new standard for decks in the digital age with an innovative approach that re-examined the fundamentals, this new model (555ESR) further refines sound quality, including improved high-frequency resolution. In addition, it features side wood panels, giving it an even more premium design. It features a midship drive system that pursues the ideal weight balance and rigid structure. To increase the rigidity of the deck and thoroughly eliminate unwanted vibrations that degrade sound quality, weight balance is a crucial point—and this new perspective led to the development of the Midship Drive System. The mechanical deck and power supply are positioned in the center of the chassis, while the control system and audio circuits are separated to the left and right sides. This achieves excellent weight balance, with the weight distributed almost evenly across the four legs. Furthermore, the inside of the chassis is divided into approximately three equal parts by a U-shaped inner chassis, further increasing overall rigidity. This results in an extremely vibration-resistant rigid structure, while also eliminating electromagnetic interference between each block and suppressing sound quality degradation. | Quartz-locked D.D. for stable tape transport & Closed-loop dual-capstan system. Sony was one of the first to apply open-reel deck technology to cassette decks with its closed-loop dual-capstan system. This system stabilizes tape transport, improving wow and flutter characteristics, reducing modulation noise, and ensuring stable head contact, among other benefits. Moreover, the capstan drive uses a new 3-phase linear motor system with extremely low rotational fluctuations. Direct drive powered by a BSL motor. Furthermore, a quartz-locked servo provides excellent wow and flutter characteristics of 0.025% WRMS and precise tape speed. | Super bias. The bias frequency has been significantly shifted up - 210kHz. This expands the frequency difference with the music signal, reducing beat noise and intermodulation distortion, while greatly improving high-frequency resolution. It makes a difference in the ability to reproduce subtle nuances. | LC-OFC wound laser amorphous head. The 555ESR features a discrete 3-head system. Sony's unique discrete three-head system ensures precise azimuth accuracy for each recording and playback head, while also providing uniform head contact. It fully utilizes the capabilities of the laser amorphous head, which employs LC-OFC windings for minimal signal transmission loss, vividly capturing the quality of digital sources. The recording and playback amplifiers are placed on separate circuit boards and arranged in two tiers, one above the other, with sufficient distance between them. This more precisely suppresses interference between the recording and playback amplifiers, and the entire system uses L/R twin mono DC amplifiers. The design also eliminates interference between channels. This is meticulous attention to protecting the purity of the sound. | Equipped with a calibration function that allows for precise adjustment of recording bias/recording level using a built-in oscillator. The meter also switches to adjustment mode. | Wireless remote control allows tape operation from the listening position. Other features include: Wireless remote control RM-99 for K555ESR. Three-stage switchable high-frequency characteristics for the recording equalizer; simultaneous display of peak hold and real-time peak values; wide-range peak program meter for enhanced readability; linear electronic counter with remaining time function; Dolby NR B-C type; memory stop/play function; TYPE I/II/IV auto tape selector; REC MUTE with auto space; tape slack prevention mechanism during cassette loading; continuous unattended recording/playback with optional timer; gold-plated headphone jack (with volume control); side wood trim included; soft eject. Main Specifications - Heads: Erase 1, Record 1, Playback 1 | Motor: Linear Torque BSL D.D. Motor 1, DC Motor 1 | S/N Ratio: 56dB (Dolby OFF, METAL-S Cassette), 73dB (Dolby NR Type C, Peak Level, METAL-S Cassette) | Frequency Response: 20~20,000Hz±3dB (METAL-S Cassette) | Frequency Range: 15-22,000Hz (METAL-S Cassette) | Wow and Flutter: ±0.04% Wpeak, 0.025% WRMS | Distortion: 0.5% (METAL-S Cassette) | Dimensions: 470 (W) × 125 (H) × 350 (D) mm | Side wood removable (Width 430mm when removed) | Weight: 10.5kg | Original sale price in japan105,000 yen (RM-99 with included remote control)

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