The AMT BAS is a complete double microphone system for the bassoon. It includes two LS microphones, two straps, two clamps, two inline preamps, cables, and a case. The LS is a professional brass and woodwind microphone with a cardioid polar pattern for minimizing off-axis noise and feedback. The clamps and straps allow you to attach the mics to both the top and bottom of the instrument to reproduce its full range. The inline preamp powers the microphone by phantom power and includes a -10 dB cut as well as a low roll-off filter. It can be clipped to a music stand or worn on the belt. The output is an XLR to the mixing board and the input is a Ta3 locking mini connector from the microphone.