Building on the incredibly popular SE1, the SE1a retains the same capsule but combines this with all new, super-quiet electronics, all housed in a superbly restyled chassis. This end-fire small diaphragm condenser microphone really is astonishing value for money. Great for drums, pianos, and acoustic stringed instruments the SE1a is a must have for any size studio. The frequency response is 30Hz-20KHz, sensitivity is 10mV/Pa - 40 ± 2dB(0dB=1V/Pa 1000Hz), Impedance is = 300?, equivalent noise level 17dB(A weighted), 137 dB SPL. 48V phantom power required.