All Sonotrim (STR) lavalier microphones and sets listed below are Positive Bias (+) and are provided with a stock carrying case and the following standard accessories in the same color as the microphone- TB, TT, COH, CH, WS, TD.
STR microphones are supplied with a number of connectors for connecting directly into various wireless microphone transmitters. In addition to those listed here, we can supply STR mics with many other types of connectors for unusual applications or older wireless transmitters. On our website we have listed the more popular models.
We offer STR systems with and without the STR-79 power supply. STR mics may be used with the appropriate STR-79 power supply to make a hardwired lavalier microphone. For powering, the STR-79 uses a small, easily user installable, battery, the V13GA, or equivalent. The STR-79 may also be used with 12 to 48 volt phantom power. When phantom power is available the battery needs to be removed. Note: A negative bias wired version may be had and a negative bias STR-79 must be used with these. We do not recommend them, although the cost is slightly lower. They are out of phase with the + bias and are more prone to picking up hum and buzz because the shield of the cable is active. We can supply STR microphones wired for negative bias as well as negative bias STR-79 power supplies. Please contact us for ordering negative bias Sonotrim products.