LD Systems LDU506BPH Wireless Headset Microphone System

The U500® Series vocal sets were developed in Germany to bring you affordable professional technology and sound quality. The radio systems for vocals and speech deliver impressive performance and high reliability, which will certainly exceed your expectations. We have designed the range specified for professional users to ensure that your performance is an impressive and emotional experience.

Selectable transmit power up to 30 mW provides the U500® vocal sets with a free-field range of over 100 metres. They are available in band: 655 – 679 MHz, where 12 systems can be operated simultaneously. The True Diversity UHF wireless systems are equipped with an automatic scan facility to find the best free frequency, and convenient one-touch infrared synchronisation of transmitter and receiver to facilitate easy setup.

High-contrast OLED displays provide an excellent overview of functions, with indicators for the group, channel, radio frequency, and signal strength and battery status. You can even enter individual usernames. In addition to the squelch function, the transmitter’s silent pilot tone ensures fail-safe operation. It protects against interference and mutes the receiver if signals without this tone are present. U500®’s efficient technology and high-quality components provide clear, distortion-free transmission without latency or artefacts. Low power consumption means that the transmitter can run for up to 10 hours with 2 x AA batteries.

The U500® Series vocal sets are available with hand-held transmitters, headsets, lavalier microphones and single or double receivers. The hand-held transmitters feature interchangeable microphone capsules to suit singing or speaking.


  • True diversity UHF wireless system
  • Shock-mounted dynamic and condenser microphone capsules
  • Automatic channel scan
  • Easy one-touch infrared frequency syncing
  • Pilot tone squelch circuit prevents noise
  • Switchable RF transmitter output (2, 10 or 30 mW)
  • Rugged enclosures
  • High-contrast OLED display

Technical Information

Type: Wireless Headset Microphone System
Modulation Type: FM
Channels: 96 (8 groups of 12 channels)
Frequency response: 60 – 16.000Hz, 60 – 16,000Hz, 30 – 16000Hz
Transmission frequency range: 655 – 679MHz
Groups: 2 x 10, 8
Inputs: Mini-XLR (3-pin)
Microphone type: dynamic
Antenna inputs: 2
Nominal impedance: 680Ohm(s)
Antenna connector: BNC
Directivity: cardioid
Signal-to-noise ratio: >90dB, > 105dB
Noise reduction: squelch
Rated HF output power: Variable (2mW, 10mW, 30mW)
Controls: volume headphones, menu, set, Power On/Off
Phantom power requirements: 5V
Indicators: 1 x HF level A/B, multifunction LC display, audio level, OLED Display
Audio output, balanced: 1 x XLR
Microphone input: mini-XLR (3-pin, female)
Audio mix output, balanced: XLR
Operating voltage: 13.5 V DC, 1,000 mA, 2 x AA battery, 2 x 1.5 V AA
Operating time: >10 h (with alkaline batteries)
Width: 483mm, 65mm
Accessories (included): power supply, 2 x antenna, Foam windscreen, batteries
Audio mix output, unbalanced: 6.3 mm jack
Height: 86mm, 45mm
Depth: 23mm, 190mm
Weight: 0,25kg, 0,09kg, 5,3kg
Max. output level: symmetrical -8dBu
Headphones ouput: 1
Length: 252mm
Diameter: 52mm
Headphones outputs: 6.3 mm TRS