SMART KIT 1023 DYNAMIC HEAD PREAMPLIFIER is a circuit specially designed for pick up heads. It has a response curve correction circuit according to RIAA standards. It can be perfectly combined with the SMART KIT No 1032 pre-tone control and make it a small audio unit. Power supply voltage 15-25V DC. Sensitivity 2.5mV. Input resistance 47KΩ. Frequency response 20-20000 Hz. Suitable power supply is SMART KIT No 1061 with an 18V AC adapter.