COM 90 PRO
Audio Cassettes Normal-Bias Type I

Communicator / Duplicator / Instant Start Series Audiocassettes
Dependable high-quality professional audiocassettes.
Our Communicator, Duplicator and Instant Start cassettes are dependable high quality audio cassettes offering you the quality and consistency you require, backed up by the Maxell reputation for excellence.

These cassettes feature wide frequency response and uniform output characteristics, assuring dependable and accurate performance from one end of the tape to the next, and from one cassette to the other. You'll enjoy these results even after repeated editing - an important consideration for many recording and playback applications.


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Specifications Unit C-30 C-45 C-60 C-90 C-120
Physical Properties Backing Material - Tensilized polyester
Total Thickness µm 16.0……………...11.5…...9.5
Oxide Thickness µm 4.0……………….4.0….. 4.0
Tape Width mm 3.81
Yield Strength kg 6
Breaking Strength kg 11
Magnetic Properties Coercivity kA/m (Oe) 30 (385)
Retentivity mT (G) 155 (1,550)
Squareness (Br/Bm) - 0.87
Electroacoustic Properties Optimum Bias dB 0
Sensitivity 315 Hz dB -0.5
6,300 Hz dB +0.5
12,500 Hz dB +0.5
16,000 Hz dB +0.5
Output Uniformity 315 Hz dB 0.3
8,000 Hz dB 0.4
MOL 315 Hz (3%THD) dB +3.5
10 kHz (saturated) dB -5.5
AC Bias Noise Level dB -55.0
Erasing Effect dB 76.0
Print-through dB 55



COMMUNICATOR SERIES Description Length Item #
COM-30 30 MINUTES 102811
COM-45 45 MINUTES 102611
COM-60 60 MINUTES 102411
COM-90 90 MINUTES 102211
COM-120 120 MINUTES 102011

DUPLICATOR SERIES Description Length Item #
DUP-30 30 MINUTES 101802
DUP-45 45 MINUTES 101602
DUP-60 60 MINUTES 101402
DUP-90 90 MINUTES 101202
DUP-120 120 MINUTES 102002

INSTANT START CASSETTES Description Length Item #
IS-30 30 MINUTES 117010
IS-60 60 MINUTES 116010
IS-90 90 MINUTES 115610

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