LD Systems U504.7 HHD2 | Dual Wireless Handheld Mic System | 470–490 MHz with OLED Display

Dual Wireless Microphone System

The LD Systems U504.7 HHD2 is a dual-channel UHF wireless microphone system featuring two dynamic handheld transmitters with cardioid capsules. Designed for professional speech and vocal performance, this USA-only 470–490 MHz system delivers clear, low-latency audio with true diversity reception, automatic channel scanning, and simple one-touch IR syncing.

LD Systems U504.7 HHD2 Competitive Differences

• True diversity reception with dual OLED displays for real-time monitoring
• Two dynamic handheld mics with interchangeable capsules and 96 selectable channels

LD Systems U504.7 HHD2 Description

The LD Systems U504.7 HHD2 brings professional-grade wireless technology to live sound applications with a robust, user-friendly design. Operating in the 470–490 MHz band (USA only), this system features true diversity reception to minimize dropouts and ensure stable signal transmission, even in crowded RF environments. Each handheld transmitter uses a cardioid dynamic capsule with a 60 Hz – 16 kHz frequency response, making it well-suited for vocals and speech. With 96 selectable channels across 8 groups, multiple systems can operate simultaneously without interference. The switchable RF power output (2, 10, or 30 mW) offers flexibility for various venue sizes, with a range exceeding 100 meters in open spaces. OLED displays on both the receiver and handheld units clearly show battery life, group/channel info, frequency, and signal strength. Setup is fast and efficient thanks to IR sync and auto channel scanning, while the pilot tone squelch circuit adds fail-safe operation by rejecting unwanted signals. Housed in a rugged 19” rack-mountable chassis, the receiver provides both balanced XLR and unbalanced TS outputs for each channel, as well as mix outputs and a headphone jack for direct monitoring. This system is ideal for houses of worship, corporate AV, mobile DJs, and event production companies.

Model Features

• Dual wireless system with two handheld dynamic microphones
• 96 channels (8 groups of 12 channels)
• True diversity receiver with dual antennas
• OLED displays on transmitter and receiver
• IR sync and auto frequency scan for fast setup
• Switchable RF output power: 2 / 10 / 30 mW
• Pilot tone squelch for interference protection
• Interchangeable mic capsules for different vocal needs

Model Specifications

• Transmission Frequency: 470–490 MHz
• Microphone Type: Dynamic, cardioid
• Frequency Response (Mic): 60 Hz – 16 kHz
• Transmitter Power Output: 2 / 10 / 30 mW (switchable)
• Receiver Frequency Response: 30 Hz – 16 kHz
• S/N Ratio: >100 dB (receiver), >95 dB (transmitter)
• Distortion (THD): < 0.1%
• Outputs: 2 x XLR, 2 x 1/4" TS, XLR & 1/4" mix out, headphone out (6.3 mm TRS)
• Receiver Dimensions: 19 x 1.75 x 7.9 in (484 x 44 x 200 mm)
• Handheld Mic Dimensions: 10.1 x 2 in (257 x 51 mm)
• Receiver Weight: 4.5 lb (2.05 kg)
• Handheld Mic Weight: 0.55 lb (0.25 kg)
• Operating Time: >10 hours (2 x AA batteries)

What's In The Box

• Dual-channel receiver
• 2 x handheld dynamic microphones
• 2 x antennas
• Audio cable
• Power adapter