Brett Ainslie
- Apr 21, 2015
- 2 min read

Wireless Transmitter Power Table

There are plenty of other specs to compare when it comes to wireless transmitters but one of the most significant is looking at the amount of power a transmitter can output while sending a signal to the receiver. Lets compare a few tiers of common wireless units in the sound field: Comtek m-216 IFBs send an audio signal outputting 10mW (milliwatts) of power. Sennheiser G2s use 20mW, G3s: 30mW. Zaxcom QIFB option of QRX100 (older version) along with some older Lectrosonics units send signals at 50mW. Some of the older and even newer Lectrosonics send signals at 100mW. The most common Lectrosonics transmitters these days are the SMV series. "V" meaning "variable" as in a variable power. The SMQV can send signals at 50mW, or 100mW or even 250mW, which is pretty much only necessary for very long distance in crowds such as the national anthem on the center of a football field at a stadium with tens of thousands of fans with their phones, coaches with their headsets, security with their walkies and officials with their wireless mics. For the record, the Zaxcom TRXLA2 can output variable power of 25, 50, or 125mW. Of course, the more power it outputs, the quicker it drains batteries.

IFB Transmitters

Comtek M-216, Comtek M-216 Option P7: 10mW

Sennheiser EW 300 IEM: 10, 30mW

Shure PSM 300: 10, 20, 30mW (selectable)

Comtek M-175: 40mW

Zaxcom QRX100 QIFB option, Comtek BST-25: 50mW

Zaxcom ZaxNet IFB200: 75mW

Comtek BST-25/216, Comtek BST-75/216 : 100mW

Zaxcom TRX900, Shure PSM 900, Shure PSM 1000: 10, 50, 100mW (selectable)

Comtek BST-75: 120mW

Lectrosonics IFBT4: 250mW