1/4" Three Frequency Two Speed 15 IPS IEC & 30 IPS AES 355 nWb/m Operating Level
This 1/4" MRL Calibration Tape has three tones 1 kHz, 10 kHz, and 100 Hz each recorded for 55 seconds one time for each speed. IEC equalization at 15 IPS and AES equalization at 30 IPS. 355 nWb/m operating level. This is as basic a calibration tape that you will get but covers the most common adjustments you need, operating level and tape head azimuth. Made in USA. This tape ships from California.