Akai 1730 SS

The Akai 1730 SS is a vintage, solid-state reel-to-reel tape deck produced from around 1972 to 1976, designed for mid to high-fidelity consumer use with four-track, four-channel surround sound capability. Here is a detailed technical overview:

Key Technical Specifications

• Track System: 4-track, 4-channel stereo/multi-channel system

• Heads: Four heads — 1 record, 1 playback, and 2 erase heads (permalloy composition)

• Tape Speeds: 3 3/4, 7 1/2 ips 

• Motors: One 2-speed hysteresis synchronous motor

• Max Reel Size: 5 or 7 inch reels

• Frequency Response: 30 Hz to 22 kHz (±3 dB) at 7 1/2 ips; 30 Hz to 15 kHz (±3 dB) at 3 3/4 ips

• Wow and Flutter: Less than 0.12% RMS at 7 1/2 ips; less than 0.15% RMS at 3 3/4 ips

• Signal-to-Noise Ratio: Better than 48 dB

• Total Harmonic Distortion: ≤ 2%

• Crosstalk: Approx. 40 dB

• Outputs: Line output at 1.228 V, headphone outputs (front and rear)

• Inputs: 40 mV line, 20 mV DIN, 0.4 mV microphone

• Power Output: 5 watts

• Dimensions: 450 mm (W) x 420 mm (H) x 240 mm (D)

• Weight: 17 kg

• Equalization: NAB playback/recording characteristics

• Features:
  Auto shut-off mechanism to protect tapes when fully wound
  Four VU meters for level monitoring
  Pause control for ease of use
  Four-digit tape counter
  Reel presser mechanism for securing tape reels firmly
  Rear and front headphone jacks for monitoring

Summary

The Akai 1730 SS represents a sophisticated quadraphonic reel-to-reel deck, offering high-fidelity four-channel surround sound as well as compatibility with conventional stereo playback. Its hysteresis synchronous motor ensures precise tape transport, and its well-designed head system allows for clean and accurate recording and playback. The auto shut-off and ergonomic control layout provide convenience and protection for users and tapes alike.

This model is notable for its sound quality, build robustness, and user-friendly features, making it a valuable deck for vintage tape enthusiasts and collectors.