The AKG WMS420 UHF Wireless Headworn Microphone System is designed for live sound reinforcement applications such as for public address, presentations, installations, and performances that require up to eight simultaneously operating systems over a 30 MHz bandwidth. This system consists of a PT420 Beltpack Wireless Microphone Transmitter, an SR420 UHF Stationary Wireless Receiver, two detachable RF antennas, an AC adapter for the receiver, a AA-size battery for the transmitter, and a C555 L headworn microphone.

The UHF receiver features two detachable antennas that enable connection to a wide range of professional RF accessories such as antenna splitters and remote mounted directional antennas for use with multi-channel systems. The front panel of the receiver features an on/off button, a rotary volume control, a button for selecting one of the available eight carrier frequencies within the system's range, an LCD display that shows the selected receiving channel, an RF OK LED to indicate the presence of a signal, and a CLIP LED to indicate when the audio level is too high.

The back panel of the receiver features a squelch control knob that will automatically mute the audio output if the strength of the radio transmission frequency becomes too weak. The back panel also features a DC IN port with strain relief for connecting the AC adapter, a balanced XLR-3F output for connecting to a live mixer, and an unbalanced 1/4" output for connecting to a guitar or instrument amplifier.

The beltpack wireless transmitter comes with a C555 L headworn microphone, but will also work with any of AKG's line of MicroMics. The beltpack features a noiseless on/off/mute switch, a gain control knob, and an LED indicator light. The transmitter is powered by a single AA battery which provides between six and eight hours of operating time with a range of approximately 30 meters. The transmitter also includes charging contacts for use with rechargeable batteries and AKG's CU400 rechargeable base station (sold separately).

PT420 Beltpack Wireless Transmitter    SR420 Stationary Receiver    Includes C555 L Headworn Microphone    8-Hour Battery Life on Single AA Battery    Detachable Antennas for RF Accessories    Balanced XLR and Unbalanced 1/4" Outputs    Adjustable Squelch Control    Audio Clip and RF Control LEDs    30 MHz Bandwidth    30-Meter Range

Enables the use of professional RF accessories such as antenna splitters and remote antennas in multi-channel systems

Automatically mutes the audio output if the signal strength of the transmission frequency falls below an adjustable threshold

Enables the use of rechargeable AA batteries

Related Questions and Answers

Q: 1. I know these have a 3.5 mm jack but has anyone had any experience with using these for making wireless PA systems with speakers?

A: The Shure PSM 900 Wireless Personal Monitor System with SE425-CL Earphones would not be recommended for use with speakers, as the beltpack's output impedance is intended for connection to headphones, not a standard line input. A system like B&H # ALSTLTHMK2X would be recommended instead.

Q: 2. How many Movo WMX-20-TX's can be used with 1 Movo WMX-20-DUO?

A: A maximum of two wireless transmitters can be used with the wireless receiver included with the Movo Photo WMX-20-DUO 2-Person Camera-Mount Wireless Lavalier Microphone System.

Q: 3. How far can you be from the receiver before the signal starts to drop out?

A: Every situation is different, so it is difficult to say what kind of distance you will get exactly before the RF signal begins to drop off. Given the output power of the transmitter is 10nW, you can expect clear reception within 40-75 feet in an open space, roughly.

Q: 4. Is there a AC powered compatible receiver that works with these mics? The batteries in the receiver just do not last.

A: No, unfortunately not. The Movo Photo WMX-20-DUO and their other wireless microphone systems are designed for use with cameras so the receivers all use batteries for power. There is no compatible receiver that uses AC power.

Q: 5. Do they make a cell phone cable?

A: https://www.bhphotovideo.com/c/product/1048152-REG/rode_sc7_trrs_iphone_cable_for.html?sts=pi&pim=Y You can order this cable for connection to smartphones and tablets.

Q: 6. Do these work over Dante?

A: This Shure PSM 900 Wireless Personal Monitor System with SE425-CL Earphones kit does not provide any Dante connectivity.

Q: 7. Is it safe to plug the receiver into an audio interface that supplies 48V phantom power?

A: Most audio interfaces that provide 48V phantom power allow for that feature to be turned off, which is what I would recommend when plugging in this system.

Q: 8. with this mic work with my Canon EOS Rebel T4I which I know is cranky and will not work with every mic?

A: It will, and that little mic/line switch in the back in the important thing. Typically you would need to attenuate a line level to mic, but with this system you don't have to, just flip the switch to Mic.

Q: 9. Can this microphone be paired with any other receivers for use in field/documentary work?

A: Yes, the Sennheiser SK-XSW-A Bodypack Transmitter that is included with the Sennheiser XSW 1-ME2 UHF Lavalier Microphone Set (A: 548 to 572 MHz) can also be used with the Sennheiser EM-XSW 2 True Diversity Receiver with External Antennas - A: 548 to 572 MHz (B&H # SEEMXSW2A) or the Sennheiser EM-XSW 1 Dual-Channel Stationary Receiver with Internal Antennas - A: 548 to 572 MHz (B&H # SEEMXSW1DU). The actual Sennheiser ME 2-II Omnidirectional Lavalier Microphone with Locking 3.5mm Connector can be used any Sennheiser wireless transmitter that accepts a locking 3.5mm connector as well as wireless transmitters from other manufacturers that use the same type of locking connector and the same internal wiring configuration.

Q: 10. Can I use 2 of these systems on one camera and have 4 separate audio channels? If I plug one receiver in XLR 1 and the second receiver in XLR 2 can I separate all 4 channels of audio for 4 people in one camera?

A: Yes, you can use two WMX-20-DUO systems at the same time on the same camera, but you would have two audio tracks, not four. Each receiver outputs one signal with the combined audio from its two mics. Also, the camera only records two audio tracks, not four. If you do need to have four separate audio tracks, it would be best to use individual wireless systems for each person and capture the audio on a multi-track recorder. The audio and video can be synced in post production.