Otari MTR-100A

The Otari MTR-100A is a high-end professional multitrack reel-to-reel tape recorder designed primarily for studio use, notable for its robust transport mechanism and advanced electronics.

• Type: 24-track analog multitrack tape recorder

• Tape Width: 2-inch (50.8 mm) magnetic tape

• Tape Speeds: 19, 38, and 76 cm/s (approximately 7.5, 15, and 30 ips)

• Tracks: 24 tracks for multitrack recording

• Noise Reduction: Built-in Dolby HX-Pro and Dolby SR noise reduction systems (internal plug-in cards)

• Transport:
  Evolution of the MTR-90 transport with enhancements such as "back-stops" to prevent tape overrun
  Transport is known for excellent speed response and stability, making it suitable for synchronization tasks
  Direct drive capstan system with servo-controlled motors

• Electronics:
  Op-amp based circuitry (solid-state)
  Transformerless active balanced inputs and outputs, with optional transformers available
  Adjustable bias, record, playback levels, and phase compensation
  Internal multi-frequency square/sine wave generator for calibration

• Controls and Features:
  Microprocessor-controlled transport logic and dual real-time counters
  Fast threading and simple tape path with no swing arms
  Tape locator with memory and shuttle functions (optional)
  SMPTE timecode interlock interface for synchronization
  Return-to-zero feature for precise tape positioning
  Tape splicing block and selectable edit modes

• Reel Size: Supports reels up to 14 inches (35.6 cm) diameter with NAB hubs and auto reel size sensing

• Wow and Flutter: Approximately 0.04% at 30 ips (unweighted, DIN standard)

• Pitch Control: ±20% continuously variable

• Weight: Around 150 lbs (68 kg)

• Usage: Widely used in professional recording studios for music production, post-production, and broadcast mastering