The DA33 is an average responding reading ac millivoltmeter and applicable a wide range of general purpose measurements. The model feature a high sensitivity of 100μV and ranges to 300V. Maximum full scale with a wide bandwidth of 10Hz to 12MHz, for audio, the DA33 is apt for measuring record and play back levels, channel separation,balance and tracking tests of volume, loudness and tone controls versus frequency, etc. The flat bandwidth of the amplifier output terminals to be used as sensitive, accurate instrument preamplifier. Other areas of use include test and repair for communications. If and ultrasonic circuits and system.