Speco Technologies CAMMIC Line-Level Microphone Audio Pickup
Overview
The Speco CAMMIC is a specialized condenser microphone designed to solve a common integration bottleneck in multi-camera surveillance systems: adding audio recording when your DVR's dedicated microphone inputs are fully occupied. Unlike standard microphone-level units, the CAMMIC outputs at line level (maximum 2Vp-p), which means it connects directly to line-level inputs on amplifiers and DVRs without adapter circuits or impedance workarounds. This is critical when you need audio documentation but your system architecture doesn't have spare microphone ports. The unit operates on 12VDC external power (not included) and delivers -62dB ± 3dB sensitivity — adequate for voice capture and event documentation across typical surveillance deployments.
Key Features
- Line-Level Output (2Vp-p max): Connects directly to amplifier and DVR line-level inputs instead of microphone preamp stages — eliminates the need for intermediate buffering or adapters when microphone ports reach capacity.
- Condenser Design with -62dB ± 3dB Sensitivity: High-sensitivity pickup captures voice and event audio reliably without requiring close mic placement, reducing installation labor when mounting near camera or access point.
- Omni-Directional Pickup Pattern: Captures audio from all directions, appropriate for open warehouse floors, corridors, or general area monitoring where directionality is not required.
- 10K Ohm High Impedance: High impedance output (10K ohms) is compatible with professional line-level inputs without impedance mismatch distortion that plagues consumer-grade microphones feeding professional audio chains.
- 20Hz–16kHz Frequency Response: Covers speech intelligibility range (300Hz–3kHz) plus sufficient low-end for vehicle detection and high-end for alarm or alert tone documentation — adequate for security event logging without requiring studio-grade audio fidelity.
- Compact 1.5-Foot Integrated Cable: Combined power and audio cable (1.5 feet) minimizes wiring runs in tight spaces; weighs only 0.1 lbs, reducing stress on lightweight mounting surfaces.
- Low Power Consumption (10mA @ 12VDC): Draws approximately 120mW, permitting integration into systems with shared or budget-constrained 12V rails without requiring dedicated power infrastructure.
- NDAA Section 889 Part B Compliant: Meets federal procurement requirements for supply-chain security in regulated and government facility deployments.
Integration and Deployment Scenarios
The CAMMIC addresses a specific pain point in facility expansions and system retrofits: you've documented audio from existing camera zones, but new access points, loading docks, or vehicle bays require audio that your DVR cannot accommodate through standard microphone inputs. Rather than swapping the recorder or adding external preamp infrastructure, the CAMMIC taps into line-level inputs typically present on amplifiers or DVR aux/speaker outputs — connections already in place in most integrated systems.
Installation is straightforward: provide 12VDC to the integrated cable, route the audio conductor to a line-level input, and commission the recording channel. The high impedance design (10K ohms) ensures that multiple CAMMIC units can be daisy-chained or mixed into a single amplifier input without cross-talk or loading issues common to low-impedance consumer microphones. This flexibility is valuable in multi-zone deployments where adding dedicated microphone channels or running balanced audio cable would disrupt existing infrastructure.
Typical use cases include dock monitoring (forklift beeping, voice communication), access control audio verification (entry alarm tones, intercom announcements), and general floor surveillance where voice recording improves incident reconstruction. The omni-directional pattern captures ambient events without requiring precise aiming or repositioning — a practical advantage in installations where microphone relocation is costly.
Power and Compliance
The CAMMIC requires external 12VDC power (Speco PSW5 optional power supply available separately). At 10mA draw, the unit is compatible with modest power budgets. Compliance with NDAA Section 889 Part B makes the CAMMIC suitable for federal, state, and municipally-regulated procurement environments where supply-chain provenance is audited.
When to Choose a Different Approach
If your facility requires directional audio (isolating a single voice or event from surrounding noise), consider a cardioid or shotgun microphone instead — the CAMMIC's omni pattern captures everything. If audio must be studio-quality or forensic-grade (high-fidelity voice recovery from poor acoustic environments), the CAMMIC's 20Hz–16kHz response and 10mA-powered condenser design are not optimized for that; specialized directional or noise-canceling microphones would be more appropriate. For systems with available microphone-level inputs and no line-level constraint, a standard microphone-level unit may offer simpler wiring.
Frequently Asked Questions
Q: Does the CAMMIC require a separate power supply?
A: Yes. The CAMMIC requires external 12VDC power (not included). A separate power supply or 12V rail is required. The Speco PSW5 is available as an optional accessory.
Q: Can I connect the CAMMIC directly to a microphone input on my DVR?
A: No. The CAMMIC outputs at line level (2Vp-p maximum). Plugging it into a microphone preamp input will likely cause distortion and clipping. Line-level inputs on amplifiers, DVR aux inputs, or line-in channels are required.
Q: What is the maximum cable run from power supply to microphone?
A: The integrated cable is 1.5 feet long. You will need to route 12VDC from your power supply to the microphone using that cable or an extension. Longer runs should maintain adequate gauge to avoid voltage drop over distance.
Q: Is the CAMMIC suitable for outdoor mounting?
A: The CAMMIC is not rated for outdoor weather exposure. No IP rating is specified, so it is intended for indoor or sheltered installation only.
Q: What does NDAA Section 889 Part B compliance mean?
A: NDAA Section 889 Part B prohibits the use of equipment containing components from certain foreign suppliers in U.S. federal and regulated procurement. Speco's NDAA compliance certifies that the CAMMIC meets those supply-chain requirements and is eligible for government facility deployments.
Q: Can I use multiple CAMMICs in the same system?
A: Yes. Each CAMMIC requires its own 12VDC power source and line-level input connection. The high impedance design (10K ohms) permits multiple units to be integrated into a single DVR or amplifier without impedance loading issues.
James EverettPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The Speco CAMMIC solves a genuine headache in retrofit audio deployments: you've maxed out your DVR's microphone inputs, but new zones still need voice and event documentation. Rather than forking over budget for a second recorder or expensive preamp infrastructure, the CAMMIC taps into line-level I/O already sitting on your amplifier or DVR aux connections. That's a straightforward engineering win in constrained installations.
Technical Highlights:
- Line-Level Output (2Vp-p): Bypasses microphone preamp entirely — no impedance matching headaches or low-level signal degradation. Plug it into a line input and you're done.
- 10K Ohm Impedance: High impedance output resists loading effects when daisy-chaining multiple units or mixing into shared amplifier inputs — something low-impedance consumer mics struggle with.
- -62dB ± 3dB Sensitivity: Adequate for typical surveillance voice capture (forklift beeping, intercom, access alarm tones) without requiring extremely close placement or high gain, which reduces installation labor and feedback risk.
- 10mA Power Draw @ 12VDC: Negligible demand on 12V rails — you can integrate this into systems with modest power budgets without straining infrastructure.
Deployment Considerations:
- Integrated 1.5-foot cable is short by design — useful for tight spaces, but you'll need to run power and audio extensions in larger facilities. Budget for low-voltage wiring.
- Omni-directional pickup means you get everything in the room — useful for open areas but not for isolating a single voice or speaker from background noise. If acoustic isolation is critical, a cardioid or shotgun mic is the better call.
- No weatherproofing — keep it indoors or under cover. Exposed loading docks or outdoor mounting will degrade the unit quickly.
Position the CAMMIC as a cost-effective solution for expanding audio coverage in existing DVR systems without major infrastructure rework. It's ideal for warehouse docks, vehicle bays, and access points where voice documentation adds value but wiring a dedicated microphone line would be disruptive or expensive. In government or federal facilities, the NDAA compliance is a practical advantage — one less certification box to check during procurement.
