DBu - FM Transmitter Lectrosonics - Free user manual and instructions
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| Product Type | FM Transmitter |
| Brand | Lectrosonics |
| Model | DBu |
| Dimensions (approx.) | 3.5 x 2.5 x 0.9 in (89 x 64 x 23 mm) |
| Weight (with battery) | 4.5 oz (128 g) |
| Power Supply | 2 AA batteries (not included) or external DC 5V via USB-C |
| Battery Life | Approximately 8 hours with alkaline batteries |
| Frequency Range | 470–608 MHz (varies by region) |
| RF Output Power | 50 mW (adjustable) |
| Audio Input | 3.5mm TRS jack (line/mic selectable) |
| Modulation | FM stereo with pre-emphasis |
| Frequency Stability | ±0.005% |
| Audio Frequency Response | 40 Hz – 15 kHz (±1 dB) |
| THD+N | < 0.5% at 1 kHz |
| Signal-to-Noise Ratio | > 60 dB |
| Operating Range | Up to 300 feet (90 m) line-of-sight |
| Channels | 256 selectable |
| Display | LCD with frequency, battery, and audio level |
| Cleaning & Maintenance | Wipe with dry cloth; avoid solvents; store in dry place |
| Safety | Use only recommended batteries; do not expose to water |
| Spare Parts & Repairability | Contact authorized service center; replaceable battery door |
| General Information | Professional-grade FM transmitter for wireless audio |
Frequently Asked Questions - DBu Lectrosonics
What type of batteries does the Lectrosonics DBu use?
The DBu uses two AA alkaline batteries (not included). It can also be powered via USB-C (5V).
How do I set the frequency on the DBu?
Press the MENU button to enter frequency mode, then use the UP/DOWN buttons to select a channel. Press MENU again to confirm.
What is the operating range of the DBu?
Up to 300 feet (90 meters) with a clear line of sight. Obstacles may reduce range.
Can I use the DBu with any FM receiver?
The DBu transmits in the UHF band (470-608 MHz) and requires a compatible receiver (e.g., Lectrosonics R4a). Not compatible with standard FM radios.
How do I adjust the audio input level?
Use the GAIN control on the side of the unit. Adjust until the audio level meter reaches about -6 dB on peaks.
What does the 'MUTE' switch do?
The MUTE switch disables the RF output to maintain privacy when not transmitting. Slide to OFF to mute.
Is the DBu waterproof?
No, the DBu is not waterproof. Avoid exposure to rain or moisture; store in a dry case.
How do I clean the DBu?
Use a soft, dry cloth to wipe the exterior. Do not use solvents or abrasive cleaners.
Can I use rechargeable batteries?
Yes, NiMH rechargeable AA batteries work well. Expected runtime is slightly less than alkaline due to voltage differences.
Where can I find spare parts or get repairs?
Contact an authorized Lectrosonics service center. The battery door is user-replaceable; other repairs should be done by professionals.
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USER MANUAL DBu Lectrosonics
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Product information
Brand : Lectrosonics
Model : DBu
Category : FM Transmitter