The AK-30 is a twin source retrofit side mounted acoustic instrument preamp with
2 band EQ, presence control and low battery indicator. Based on the AK15
plus is processes the AER standard piezo under saddle pickup and a
single microphone each addressable by separate fader. The microphone is
depending on the Piezo volume. It can be used for a wide range of
instruments, if you need tone and volume controls directly accessible.
AK30 can be phantom powered by AER amps without having to remove the battery.