AKG WMS420HEADSETBDD - UHF Headworn Band D Wireless System with Beltpack, Headset Microphone, and Receiver

AKG WMS420HEADSETBDD - UHF Headworn Band D Wireless System with PT420 Bodypack, C555L Microphone, and SR420 Receiver

The AKG WMS420HEADSETBDD is a complete UHF wireless system for speech and performance, including the SR420 receiver, PT420 bodypack, and C555L headworn microphone (cardioid condenser). It operates in Band D (863.1–864.9 MHz) , the segment known as “Channel 70” in Europe (local regulations apply). The system features antenna switching diversity , pilot tone transmission to prevent unwanted noise, balanced XLR and 1/4” (6.35 mm) outputs , and detachable BNC antennas for integrating distributors and remote antennas. The bodypack is powered by a single AA battery and provides up to 8 hours of battery life; the audio link covers 40 Hz–20 kHz with a typical SNR of 105 dB(A) and THD of ~0.8% . The C555L microphone provides a high intelligibility cardioid pattern ( 80 Hz–20 kHz ) and connects directly to the bodypack via a 3-pin mini XLR (TA3F) .

Main features

• Headworn Set: SR420 Receiver + PT420 Bodypack Transmitter + C555L Microphone (Condenser, Cardioid) + W444 Windscreen.
• Frequency band: Band D 863.1–864.9 MHz (channel 70; local regulations apply).
• Multi-channel capability: Up to three systems can be operated simultaneously on Band D; up to eight systems can be operated on other bands in the WMS420 series with proper planning.
• RF architecture: antenna switching diversity , pilot tone and adjustable squelch for secure transmission.
• System Audio: 40 Hz–20 kHz , Typical SNR 105 dB(A) , THD ~0.8 % .
• Receiver connectivity: Balanced XLR and unbalanced 6.35 mm jack ; detachable BNC antennas .
• PT420 Transmitter: mini XLR (TA3F) input, gain control, silent on/off/mute , low battery warning and charging contacts for CU400 base.
• C555L Microphone: Lightweight and stable cardioid headband ( 80–20,000 Hz ), with flexible boom and left/right option.
• Power and autonomy: 1 × AA in the belt pack, up to 8 hours of continuous use.
• Nominal range: ~ 30 m line of sight (expandable with external antennas/accessories).

Product benefits

• Hands-free and clear: The C555L cardioid headband keeps your voice crystal-clear, with high gain before feedback.
• Stable operation: diversity, pilot tone and squelch reduce cuts and ignition noise.
• Easy setup: selectable fixed channels on receiver and beltpack, RF/audio indicators and battery warning.
• Professional integration: XLR/Jack outputs and detachable BNC antennas to expand the system with distributors and remote antennas.
• Low operating cost: up to 8 hours with a single AA and option to recharge at the base (CU400) without removing the battery.

Use cases

• Presentations and conferences: fully mobile speakers with consistent voices.
• Education and training: classes, workshops, or gyms where the technician needs hands-free access.
• Theater and performances: narration and dialogue with a discreet and stable microphone.
• Worship and corporate events: quick setup and reliable operation on channel 70.

Frequently Asked Questions

• Does it include all the cables and accessories for use? Yes: SR420 receiver, PT420 beltpack, C555L microphone, W444 windscreen, two antennas, a power adapter, and one AA battery.
• Does the C555L need phantom power from the table? No. The PT420 bodypack powers the microphone directly via the 3-pin mini XLR connector.
• How many simultaneous systems can I use? On Band D , up to 3 in the same location; on other WMS420 bands, up to 8 can be planned.
• Does it have infrared sync? No; channel selection is manual on both the receiver and transmitter.

Description for projects

AKG WMS420HEADSETBDD UHF wireless system (Headworn, Band D 863.1–864.9 MHz). SR420 receiver with antenna switching diversity, balanced XLR and 1/4” unbalanced jack outputs, detachable BNC antennas, adjustable squelch ; link 40 Hz–20 kHz , SNR 105 dB(A), THD ~0.8%. PT420 transmitter with mini XLR (TA3F) input, gain control, silent mute and up to 8 h of battery life (1×AA). C555L headset microphone (cardioid condenser, 80–20,000 Hz ). Range approx. 30 m in LoS.