DHu - Microphone Lectrosonics - Free user manual and instructions
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| Product Type | Digital Wireless Microphone System |
| Model | DHu |
| Brand | Lectrosonics |
| Frequency Range | 470–614 MHz (UHF TV bands 14-38) |
| RF Output Power | 50 mW (selectable low/high) |
| Audio Input | Balanced TA5F (locking) for mic/line |
| Audio Output | Balanced TA5M (locking) on receiver |
| Modulation Type | Digital Hybrid (patented) |
| Latency | < 2.5 ms (typical) |
| Power Supply | 2x AA Alkaline or rechargeable NiMH batteries |
| Battery Life | Approximately 8 hours with alkaline |
| Dimensions (Transmitter) | 94 x 64 x 27 mm |
| Weight (Transmitter) | 90 g (without batteries) |
| Dimensions (Receiver) | 94 x 64 x 27 mm |
| Weight (Receiver) | 100 g (without batteries) |
| Operating Temperature | -20°C to +50°C |
| Frequency Stability | ± 2.5 ppm (over temperature range) |
| Compatible Microphone Capsules | Standard 5-pin Lemo (e.g., DPA, Sanken) |
| Cleaning Instructions | Wipe with dry soft cloth; avoid solvents |
| Safety Warning | Do not expose to rain or moisture; use only specified batteries |
| Spare Parts Availability | Battery door, belt clip, antenna (via Lectrosonics service) |
| Repairability | Serviceable by authorized technicians; no user-serviceable parts |
| General Information | Designed for professional film/TV sound; uses Digital Hybrid Wireless technology for compander-free audio |
Frequently Asked Questions - DHu Lectrosonics
How do I pair the DHu transmitter and receiver?
Press the SET button on the receiver to enter pairing mode, then press the SET button on the transmitter. The units will automatically sync using IR or RF handshake.
What is the battery life of the DHu?
With two AA alkaline batteries, the transmitter lasts approximately 8 hours. Rechargeable NiMH batteries provide about 6–7 hours.
Can I use the DHu with other microphone capsules?
Yes, it accepts standard 5-pin Lemo capsules (e.g., DPA 4060, Sanken COS-11D). Ensure the capsule is wired correctly for bias voltage.
How do I change the frequency on the DHu?
Use the UP/DOWN buttons on the transmitter or receiver to scroll through available frequencies. Press SET to confirm. Ensure no other signals are interfering.
Is the DHu compatible with Lectrosonics Digital Hybrid receivers?
Yes, it works with all Digital Hybrid receivers like the SRc, SR5P, and UCR411A+. It uses the same modulation protocol.
How do I clean the DHu transmitter?
Wipe the exterior with a dry, soft cloth. Do not use any solvents or abrasive cleaners. Avoid moisture entering the battery compartment or connectors.
What should I do if the audio sounds distorted?
Check the gain setting on the transmitter – reduce it if the audio overload LED flashes. Also verify that the battery voltage is adequate.
Can the DHu transmit in stereo?
No, it is a mono system. For stereo, use two separate DHu units or a dual-channel transmitter like the DCHT.
How do I update the firmware on the DHu?
Firmware updates require a Lectrosonics USB interface (e.g., USB-C cable and LectroRM software). Contact your dealer for details.
Where can I find spare parts for the DHu?
Contact Lectrosonics directly or an authorized service center. Common spares include battery doors, belt clips, and antennas.
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