TDK SA (1989 US) 4 Pack with Headphones Cassette Tape

TDK SA Cassette Bundle Description

The TDK SA-1989 US 4-Pack with Headphones comprises four blank tape media, each a TDK SA 90-minute IEC Type II audio cassette, and a dedicated headphone set. The SA formulation utilizes Super Avilyn (ferricobalt “pseudochrome”) coating, introduced as a royalty-free alternative to CrO₂, offering stable bias characteristics and consistent frequency response across standard cassette tape decks.

2. TDK SA Cassette Bundle Technical Specifications

• Tape Type: IEC Type II (Chrome, Ferricobalt Super Avilyn)
• Bias Noise: –54.3 dB; –58.4 dB(A)
• Dynamic Range: 64.8 dB
• Maximum Output Level (MOL): +6.4 dB @ 400 Hz (3 % THD); +6.1 dB @ 1 kHz (3 % THD)
• Signal-to-Noise Ratio: 58.4 dB(A)
• Magnetic Particle: Ferricobalt (Super Avilyn)
• Coercivity: 650 Oe; Remanence: 1 650 Gauss; Squareness Ratio: 0.85; Operating Bias: 0.0 dB

3. User Reviews

• “The TDK SA cassette was specifically recommended by Portastudio manufacturers Tascam for use in home multitracking; it rendered excellent sound preservation and detail across the frequency spectrum.”
• “It was highly resilient, minimizing glitches in the recording, one of the most serious problems with physically narrow tape media.”

4. TDK SA Cassettes + Headphones Bundle Key Features

• Extended Play Duration: 90 min per tape for uninterrupted audio cassette recording.
• High-Bias Formulation: Super Avilyn ferricobalt coating reduces noise compared to Type I blanks.
• Stable Tape Calibration: Industry reference for bias and equalization alignment.
• Broad Frequency Response: MOL metrics indicate balanced performance at low and high frequencies.
• Headphone Monitoring: Included headphones enable direct audio verification during recording and playback.