CRY5611 Sound level calibrator is suitable for sound pressure calibration of sound level meters and electroacoustic testers. CRY5611 has many advantages, including high stability, small size, light weight, low power and easy to use. With the operating frequency of 1000 Hz, it will not affected by the weighted network during calibration. (A, B, C, D weighted networks have zero attenuation at 1 kHz.)

CRY575 MIC power is a three-channel microphone power module that provides a constant current source for the IEPE  preamplifier, as well as the positive/negative power for the dual-power supply preamplifier. It is featured by high input impedance, low output impedance, low noise floor, and wider frequency response range. It can be used with CRY506 IEPE  Preamplifier and CRY502 Preamplifier, and can also be compatible with the preamplifiers of other brands. CRY575 MIC power provides 0 dB (X1), 20 dB (X10), and 40 dB (X100) gain for output signals. The output interface uses the widely-used BNC port, so enabling users to easily connect to the input terminals of general instruments.

CRY584D is designed for laboratory and production line testing, with a 2-channel power amplifier. The power supply unit can be used to supply power to the microphone and ear stimulator and other components. The power amplifier is used to drive speakers, headphones, mouth stimulators and other devices.

The two-channel power amplifier is connected to the chassis case, so that it can be connected to multiple devices under test simultaneously without mutual interference.