Adastra CBM20 Ceiling Boundary Microphone - White
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Product Information
Full details
The Adastra CBM20 is a low-profile, white ceiling boundary microphone ideal for discreet audio capture in meeting rooms, lecture halls, or public address systems. Its omnidirectional pickup pattern ensures broad sound coverage, while phantom power provides reliable operation. A key caveat is its reliance on an external phantom power supply, which must be sourced separately.
All features
| Model Part Number | 952.347UK |
|---|---|
| Brand | Adastra |
Extended Product Information
FAQs
What is phantom power and do I need it?
Phantom power is a DC electrical voltage (typically 48V) sent from your audio mixer or interface through the microphone cable to power the microphone's internal electronics. Yes, the Adastra CBM20 requires a 9-52Vdc phantom power supply to operate.
Can I connect this directly to my computer?
You will need an audio interface or mixer with an XLR microphone input that can provide phantom power. Most computers do not have these inputs directly.
What is an omnidirectional pickup pattern?
An omnidirectional microphone picks up sound equally from all directions (360 degrees). This is useful for capturing ambient sound or when multiple sound sources need to be captured without precise aiming.
What is the maximum thickness of the surface the microphone can be mounted through?
The microphone is threaded for mounting through holes up to 50mm in thickness.
How far away can the microphone effectively pick up sound?
The effective range depends on the sound source volume and ambient noise levels. Generally, for clear voice capture, it's most effective within a 3-5 meter radius, but it will pick up sounds from further away with reduced clarity.
Is the microphone directional?
No, the Adastra CBM20 features an omnidirectional pickup pattern, meaning it captures sound from all directions equally.
Troubleshooting
No sound output
Verify that phantom power is enabled and supplying the correct voltage (9-52Vdc). Check all XLR cable connections for a secure fit. Ensure the input gain on your mixer or interface is turned up.
Low audio level or poor quality
Confirm the microphone is within optimal range of the sound source. Ensure the phantom power supply is stable. Check for any obstructions around the microphone capsule.
Humming or buzzing noise
Ensure all audio cables are properly shielded and grounded. Try a different XLR cable. Check for nearby sources of electrical interference.
Pros and Cons
Pros
- Discreet and unobtrusive design
- Wide sound capture with omnidirectional pattern
- Standard XLR connection for broad compatibility
- Easy ceiling mounting mechanism
Cons
- Requires external phantom power supply
- Limited to ceiling or surface mounting
- White color may not suit all decors
Setup, Compatibility & Care
Setup:
- Ensure a compatible phantom power supply (9-52Vdc) is available.
- Connect the microphone's XLR male connector to your audio mixer, preamp, or interface.
- Connect the phantom power supply to the microphone input or directly to the microphone as per your system's configuration.
- Mount the microphone through a hole up to 50mm in the ceiling or surface, securing it in place.
Compatibility:
- Requires a phantom power source (48V is common and recommended).
- Compatible with any audio device featuring an XLR microphone input that can supply phantom power.
Care:
- Wipe gently with a dry, soft cloth.
- Avoid using liquids or abrasive cleaners.
- Ensure the microphone is not exposed to moisture or extreme temperatures.