AKG WMS420HEADSETBB1 - B1 UHF Headworn Band Wireless System with Beltpack, Headset Microphone, and Receiver

AKG WMS420 Headworn Set Band B1 - UHF Wireless System with PT420 Bodypack, C555 L Headset Microphone and SR420 Receiver (748.1–751.9 MHz)

The AKG WMS420 Headworn Set Band B1 is a professional UHF wireless system for hands-free applications in presentations, education, fitness and live performance. It includes the SR420 receiver (switched diversity, 1/2 rackmount, detachable BNC antennas), the PT420 bodypack and the C555 L headworn microphone (cardioid condenser with moisture shield). The Band B1 operates between 748.1 and 751.9 MHz with 5 compatible fixed frequencies , facilitating the coordination of up to 5 simultaneous systems on the same band. The system delivers wide, natural audio (40–20,000 Hz), typical S/N 105 dB(A) and typical THD 0.8% , with direct integration to mixers and loudspeakers via XLR and 1/4" jack outputs.

Main features

• Dedicated B1 band : 748.1–751.9 MHz with 5 factory-fixed channels /frequencies for simple and reliable deployments.
• C555 L headworn microphone ( cardioid condenser ) with moisture shield , 80–20,000 Hz response, 25 mV/Pa sensitivity and 3-pin mini-XLR connector.
• PT420 Transmitter : Up to 8 hours with 1×AA, charging contacts for NiMH batteries, gain control and silent On/Off/Mute switch.
• SR420 Receiver : switching diversity, adjustable squelch , RF OK and Clip indicators, XLR and 6.3 mm jack outputs , 1/2 rack format ( 150 × 44 × 200 mm ).
• System Audio : 40–20,000 Hz (±3 dB), S/N 105 dB(A) , THD 0.8 % @1 kHz , FM modulation.
• Set contents : SR420, PT420, C555 L microphone, W444 windscreen and spare drip ring , 2 antennas, power adapter and 1 AA battery.

Product benefits

• Prioritized and clear voice : Cardioid capsule that reduces ambient noise and feedback, ideal for dynamic rooms and classes.
• Quick setup : Predefined channels, front-facing indicators, and standard connectivity make setup quick.
• Real-world reliability : Antenna diversity, squelch , and detachable BNC antennas allow you to optimize coverage with professional accessories.
• Low operating costs : up to 8 hours with an AA battery; direct recharging (NiMH) via integrated contacts.

Use cases

• Training and conferences in classrooms, auditoriums and multipurpose rooms.
• Fitness and dance classes with high mobility and perspiration.
• Events and live shows with presenters or musicians that require hands-free operation and agile setup.

Frequently Asked Questions

How many systems can I operate simultaneously on Band B1? Band B1 has five fixed frequencies ; therefore, up to five systems can operate simultaneously within that specific band. On other WMS420 bands , up to eight channels per band are possible.

What exactly does the box contain? PT420, SR420, C555 L headband, W444 windscreen , spare lip guard , two BNC antennas, a power adapter, and one AA battery.

What is the typical range? Approximately 30 m line-of-sight (can be extended with suitable external antennas and RF distribution).

Description for projects

AKG WMS420 UHF Wireless System Headworn Set Band B1 ( 748.1–751.9 MHz ; 5 fixed frequencies : 748.1 / 748.5 / 749.5 / 751.2 / 751.9 MHz). Includes SR420 (switching diversity; balanced XLR and 6.3 mm jack ; adjustable squelch ; RF/Clip indicators; detachable BNC antennas; 150 × 44 × 200 mm ) and PT420 (mini-XLR 3p; audio 40–20,000 Hz ; S/N 105 dB(A) ; THD 0.8 % ; up to 8 h battery life with 1×AA; 60 × 75.5 × 30 mm , 214 g ) with C555 L microphone (cardioid condenser; 80–20,000 Hz ; 25 mV/Pa ; mini-XLR 3p; ≈ 26 g ). FM modulation.