Technics RS 671US
A three-head cassette deck with DC servo motors and Dolby B & C noise reduction, made in Japan by Technics
Overview
The Technics RS-671US is a stereo cassette deck produced in the mid-1970s, specifically noted for its 1976 release. It features a horizontal front-loading design and uses a two-head system combined with a separate erase head, forming a three-head configuration. Designed for high fidelity, it supports metal tape use and includes both Dolby B and C noise reduction systems for improved audio clarity.
Specifications
| Frequency Response | 20Hz-20kHz (Metal Tape) |
| Wow and Flutter | 0.04% (WRMS) |
| Signal-to-Noise Ratio | 70dB (Dolby C) |
| Total Harmonic Distortion | 1.0% |
| Heads | 3 (Ferrite & Sendust) |
| Motors | 2 (DC Servo capstan, DC reel) |
| Input | Line (50mV/50k ohms), Mic (0.25mV/10k ohms) |
| Output | Line (0.5V/2.2k ohms), Headphones (8 ohms) |
| Dimensions | 430 x 125 x 305mm (W x H x D) |
| Weight | 6.5kg |
Design
The RS-671US uses a two-head system with a separate erase head, employing a combination Ferrite/Sendust record/playback head. It features a DC servo motor for the capstan and a DC motor for the reels, ensuring stable tape speed and reliable transport operation. Dolby B and C noise reduction are integrated to enhance signal quality, particularly with metal tapes.
Context
Considered a solid mid-range deck from the early 1980s, the RS-671US is recognized for reliable performance and good sound quality, especially when using metal tapes. Owners often highlight its sturdy construction and simple, functional design.
Market
Common issues include worn belts, dirty mode switches, aging capacitors, and hardened idler tires on the reel motor, which can affect tape movement. Replacement belts and tires are generally available from online suppliers, making restoration feasible for units needing maintenance.
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