• Brett Ainslie

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: 30mWZaxcom 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 optionComtek BST-25: 50mW

Zaxcom ZaxNet IFB200: 75mW

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

Zaxcom TRX900Shure PSM 900, Shure PSM 1000: 10, 50, 100mW (selectable)

Comtek BST-75: 120mW

Lectrosonics IFBT4: 250mW


Body Transmitters

Shure QLXD14-93: 1, 10mW

Shure ULXD Series: 1, 10, 20mW

Sennheiser EW 100 G2: 20mW

Shure SLX: 30mW

Shure FP Series: 10-30mW (varies by region)

Sennheiser EW 100 G3Sennheiser EW 100 G4: 30mW

Zaxcom TRXLT2, Lectrosonics LMb, LMaShure LX Series: 50mW

WisyCom MTP41, MTP40, MTP40 Lite: 10, 50mW (selectable)

Audio LTD TXP: 20, 50mW (selectable)

Lectrosonics SSM: 25, 50mW (selectable)

Audio LTD A10 US: 10, 20, 50mW (selectable)

Lectrosonics UM400a, UM200, SMd or SMDa, MM: 100mW

Lectrosonics LT: 50, 100mW (selectable)

WisyCom MTP40S: 10, 50, 100mW (selectable)

Zaxcom TRXLA2: 25, 50, 125mW (selectable)

Lectrosonics SMQa: 250mW

Lectrosonics WM, SMV or SMQV: 50, 100, 250mW (selectable)


Plug-On (Boom) Transmitters

Shure FP Series: 10-30mW (varies by region)

Sennheiser SKP100, SKP3000: 30mW

Sennheiser SKP300: 10, 30mW (selectable)

Sony UTX-P03: 10 (Asia), 30 (Europe), 40mW (Americas)

Audio LTD PTX: 25, 50mW

Lectrosonics HM, UH400a: 100mW

Zaxcom TRX742: 25, 50, 125 mW (selectable)