The output from a condenser microphone is a very high-impedance signal and is therefore very sensitive to the capacity loads of cables. This make it necessary to introduce a driver with a high input impedance and a low output impedance. Such a driver is called a preamplifier.
The frequency range of a preamplifier is determined by its electronic circuit and is typically more than 200 kHz at the high end and 1-10 Hz at the lower end. The lower end is determined by the input impedance of the preamplifier and the capacitance of the microphone. High microphone capacitance gives a low cut off frequency
The dynamic range of a preamplifier is defined as the range between the highest level the preamplifier can handle without distortion, and the lowest level it can measure. The highest level is related to the preamplifiers supply voltage, whereas the lowest level is related to the electrical noise generated by the preamplifier itself.
Three basic types of preamplifiers are available
current-sensitive preamplifier
parasitic-capacitance preamplifier
charge-sensitive preamplifier.
CRY3501
CRY3501 is a preamplifier powered by a constant current power supply. It can be used in conjunction with the CRY3000 series 1/2 inch prepolarized measurement microphone. At the same time, it is widely compatible with other brands.
CRY3501 converts high input impedance to low output impedance, allowing the use of a longer extension cable. Its advantage of low background noise hardly causes a load to the microphone. It supports TEDS function, which can reduce test time. Its good design and toughness make it widely applicable to various environmental conditions.
CRY3502
CRY3502 is a short constant current power preamplifier. It can be used with the CRY3000 series 1/2 inch prepolarized measurement microphone and is widely compatible with other brands.
CRY3502 converts high input impedance to low output impedance, allowing the use of a longer extension cable. The advantage is that the background noise is low and it hardly causes a load on the microphone. It supports the TEDS function and reduces test time. The compact design enables it to measure in environments with limited space. impedance, allowing the use of a longer extension cable. Its advantage of low background noise hardly causes a load to the microphone. It supports TEDS function, which can reduce test time. Its good design and toughness make it widely applicable to various environmental conditions.
CRY3503
CRY3503 is a constant current power preamplifier. It can be used with the CRY3000 series 1/2 inch prepolarized measurement microphone and is widely compatible with other brands.
CRY3503 converts high input impedance to low output impedance, allowing the use of a longer extension cable. The advantage is that the background noise is low and it hardly causes a load on the microphone. It supports the TEDS function and reduces test time. The compact design enables it to measure in environments with limited space.
CRY3541
Seamlessly converting high input impedance to low output impedance, the CRY3541 enables the use of longer extension cables without compromising performance. Its low background noise ensures minimal impact on the microphone, while TEDS functionality speeds up testing processes. Designed for durability and resilience, it performs reliably across various environmental conditions.
CRY3542
CRY3542 is a constant-current power preamplifier that can be used with the CRY3000 series 1/4 inch prepolarization measuring microphone and is widely compatible with other brands.
The CRY3542 features a high input impedance that is converted to a low output impedance, enabling the use of extended cables without compromising performance. It boasts exceptionally low background noise, minimizing any load on the microphone and ensuring accurate results. The inclusion of TEDS functionality streamlines testing by reducing setup time. Its robust design and durability make it adaptable to a variety of environmental conditions.
CRY3543
The CRY3543 is a constant-current power preamplifier that can be used with the CRY3000 series 1/4 inch prepolarization measuring microphone and is widely compatible with other brands.
By converting high-input impedance to low output impedance, the CRY3543 allows the use of longer extension cables. It offers exceptionally low background noise, ensuring minimal impact on the microphone’s performance. Its TEDS functionality further enhances efficiency by reducing test time. With a robust design and high durability, it is well-suited for a broad range of environmental conditions.
CRY3521
CRY3521 is a base-type preamplifier powered by a constant current power supply. It can be used in conjunction with the CRY3000 series 1/2 inch prepolarized measurement microphone and is widely compatible with other brands.
CRY3521 is a base-type preamplifier powered by a constant current power supply. It can be used in conjunction with the CRY3000 series 1/2 inch prepolarized measurement microphone and is widely compatible with other brands.
