TDK SA-X Cassette Bundle Description

The TDK SA-X (1990–1991 US) 4 Pack with Headphones includes four 100-minute blank tape media and a dedicated headphone set. Each audio cassette employs a dual-layer Super Avylin chrome formulation (Type II), originally introduced as a benchmark for deck calibration and known for stable bias characteristics and a wide dynamic range. The included headphones allow direct monitoring of recording and playback without additional equipment, making this bundle suitable for professional studio, field recording, and personal archival applications.

TDK SA-X Cassette Bundle Technical Specifications

• Tape Type: IEC Type II / Chrome (Super Avylin dual-layer)
• Equalization: 70 µs
• Coercivity: 620 Oe
• Remanence: 1 650 Gauss
• Squareness Ratio: 0.83
• Operating Bias: +1.0 dB
• Maximum Output Level (MOL): +4.0 dB @ 315 Hz; –7.5 dB @ 10 kHz
• Sensitivity: +1.0 dB @ 315 Hz; +1.0 dB @ 10 kHz; +3.0 dB @ 16 kHz
• Bias Noise: –61.0 dB