Ampex 850

The Ampex 850 is a part of the Ampex 800 series of reel-to-reel tape decks, introduced around 1966. It is a professional-grade four-track, two-channel stereo/monaural tape recorder designed for advanced home use and semi-professional applications.

• Track and Channel System: Four-track, two-channel system on 1/4-inch tape, enabling stereo recording on alternating tracks and mono playback/recording options.

• Tape Speeds: Supports three selectable tape speeds: 1 7/8, 3 3/4, and 7 1/2 ips, balancing recording length and audio fidelity.

• Performance:
  Frequency response of 50 Hz to 15 kHz at 7 1/2 ips
  Wow and flutter rated at 0.15% (7 1/2 ips)
  Signal-to-noise ratio around 46 dB
  Total harmonic distortion approximately 2%

• Electronics and Construction: Solid-state circuitry ensures lower noise, improved reliability, and easier maintenance compared to tube models. The machine is built with sturdy components and features a walnut cabinet finish characteristic of its era.

• Physical Dimensions and Weight: Approximately 483 x 343 x 190 mm in size and weighing 17.8 kg, designed for desktop or cabinet use in home or studio environments.

Usage Context

The Ampex 850 was targeted at audiophiles and semi-professional users seeking a reliable and high-quality tape recorder for stereo and mono audio applications. Its versatility in tape speeds, solid-state technology, and robust construction made it suitable for serious home studios and light professional use.

Summary

The Ampex 850 is a well-rounded, four-track stereo reel-to-reel tape deck from the mid-1960s, known for its solid-state reliability, flexible speed options, and high-quality audio performance. It represents a classic model in the Ampex 800 series, combining durable construction with audiophile-grade sound capabilities.