AKG WMS420PRESSETBDU1 - Presenter Band U1 UHF Wireless System with Beltpack, Lavalier Microphone, and Receiver

AKG WMS420 Presenter Set BDU1 – UHF Band U1 Wireless System with PT420 Bodypack, C417 L Lavalier Microphone, and SR420 Receiver

The AKG WMS420 Presenter Set Band U1 is a professional-grade analog UHF wireless system for speech and presentations that combines the SR420 receiver , PT420 bodypack , and C417 L lavalier microphone (omnidirectional). It operates in the U1 Band (606.1–613.9 MHz) , with up to 8 compatible channels per band and a tuning width of up to 30 MHz (depending on band). The SR420 incorporates antenna switching diversity with 50 Ω BNC connectors, balanced XLR and 6.3 mm jack outputs with switchable mic-to-line level and adjustable squelch to keep the signal free of noise. The PT420 offers easy operation with an On/Mute/Off switch and gain control, and offers up to 8 hours of battery life on a single AA battery. The C417 L lavalier provides natural pickup, 20 Hz–20 kHz , and high sensitivity for a uniform and intelligible voice.

The system provides a frequency response of 40 Hz–20 kHz , a typical SNR of 105 dB(A) and a typical THD of 0.8% , and a pilot tone to prevent power-up/power-down noise. It is a robust, scalable, and easy-to-deploy solution for auditoriums, classrooms, conference rooms, or places of worship where reliability and voice clarity are required.

Main features

• Band U1 (606.1–613.9 MHz) : UHF band suitable for frequency coordination in installations and events (use subject to local regulations).
• Up to 8 compatible channels per band and pre-selected fixed frequency bank for quick configuration.
• Antenna switching diversity on the SR420 with detachable 50 Ω BNC antennas; can be used with professional antenna accessories.
• Quality Audio : 40Hz–20kHz system, 105dB(A) SNR and 0.8% THD typical.
• Lavalier C417 L : pre-polarized condenser, omnidirectional pattern, 20 Hz–20 kHz , sensitivity approx. 7 mV/Pa , 1.5 m cable.
• PT420 Beltpack : Gain control, On/Mute/Off , 3-pin mini XLR and up to 8 hours of operation with 1×AA.
• Receiver connectivity : Balanced XLR and unbalanced 6.3 mm jack , switchable microphone to line level and adjustable squelch (-100 to -70 dBm).
• Typical range of 30 m line of sight (expandable with remote antennas and antenna distribution).
• Pilot tone to avoid unwanted noise when connecting/disconnecting transmitters.

User benefits

• Natural clarity for spoken voice: The C417 L captures consistently even with head movements or changes in distance.
• Fast deployment : Preset frequency banks, simple manual sync and clip /RF measurement from the receiver.
• Event reliability : antenna diversity, adjustable squelch, and pilot tone reduce dropouts and noise.
• Low maintenance : up to 8 hours with a standard AA battery; contact charging possible with the optional charger.
• Scalability : up to 8 channels within the same band for multi-user rooms or larger setups.

Use cases

• Conferences, master classes, corporate presentations, and streaming.
• Theatre, religious services and museums, where discreet microphones with freedom of movement are required.
• Fixed installations in auditoriums and educational centers with multi-channel needs.

Set contents

• SR420 UHF receiver with 2 detachable BNC antennas and power supply.
• PT420 bodypack transmitter with clip.
• C417 L lavalier microphone (omnidirectional) with W407 windscreen and mounting accessories.
• AA battery and documentation.

Frequently Asked Questions

• How many systems can I use simultaneously? Up to 8 compatible channels per band , with proper coordination and compliance with current radio frequency regulations.
• Is the RF power fixed? The WMS420 series supports 10/20/50 mW depending on the band/region. Check the allowable setting in your country.
• Can I use other capsules or microphones? The PT420 accepts AKG microphones with a 3-pin mini XLR (lavalier, headworn, or instrument cable).

Description for projects

AKG WMS420 Presenter Set UHF wireless system Band U1 (606.1–613.9 MHz) consisting of SR420 receiver (switching diversity; balanced XLR and 6.3 mm jack outputs; switchable mic/line level; squelch -100 to -70 dBm; 50 Ω BNC antennas; typical range 30 m; dimensions 200 × 150 × 45 mm; weight 373 g without antennas) and PT420 bodypack (3-pin mini XLR; gain control; 60 × 75.5 × 30 mm; 60 g; up to 8 h battery life with 1×AA). C417 L lavalier microphone (omnidirectional condenser; 20 Hz–20 kHz; sensitivity ~7 mV/Pa; 1.5 m cable). System specifications: FM modulation; response 40 Hz–20 kHz; SNR 105 dB(A); THD 0.8%; up to 8 compatible channels per band.