Otari MTR-90

The Otari MTR-90 is a professional multitrack analog reel-to-reel tape recorder designed primarily for mastering and high-end studio applications. It is renowned for its robust construction, precision tape transport, and advanced features that ensure high fidelity and reliable operation.

• Tape Format and Tracks:
  Uses 2-inch wide tape.
  Supports 24-track recording and playback (MTR-90III model).
  Also available in 16-track versions pre-wired for 24-track upgrade.

• Tape Transport and Drive System:
  Pinch-rollerless design using wide-diameter spindles, capstan, and tachometer to distribute tension evenly, minimizing tape wear and oxide damage.
  Direct-drive capstan motor with quartz PLL servo for precise speed control.
  High-torque DC servo reel motors for fast winding and rapid start-up.
  Massive precision-machined top plate and welded steel chassis for mechanical stability and long-term reliability.
  Modular construction for ease of maintenance and service.

• Tape Speeds:
  Multiple selectable speeds including 7.5, 15, and 30 ips (inches per second).
  Vari-speed and crystal-locked speed options available.
  External speed reference input supported.

• Wow and Flutter:
  Extremely low, typically around 0.04% at 30 ips, ensuring pitch stability.

• Frequency Response:
  Approximately 40 Hz to 20 kHz at 30 ips, suitable for high-fidelity mastering.

• Signal-to-Noise Ratio:
  Around 78 dB, providing a clean, low-noise audio signal.

• Controls and Features:
  Cue wheel for precise tape positioning and gentle tape rocking during editing.
  Motor-driven retractable head shields for easy access and tape protection during editing.
  Spot erase function for selective track erasure.
  Practical splicing block integrated into the transport.
  Remote control unit (CB-147) included, featuring transport controls, speed selection, pitch control, and digital speed display.
  Stable active balanced input and output circuitry with selectable balanced or unbalanced operation.
  Serial I/O connector (RS-232 standard) and parallel I/O interface for external control and automation.

• Build and Reliability:
  Designed for long-term stability with a heavy-duty chassis and precision components.
  Modular electronics and transport logic enhance serviceability and reduce downtime.