The ASK-4® #304 is a four zones audio monitoring system designed ideally for connection to IP cameras or NVRs. Verifact® A microphones can pick up sounds within a 30′ diameter circle. The model IF-4 interface adapter connects to the microphones, supplies power to the microphones and drives audio into the input of the recording device. The four Verifact® A microphones are designed for ceiling mount applications.
IF-4:
- Line level audio output (RCA) to NVR, IP Camera, etc.
- Adjustable gain potentiometer
- Low-profile for ease of installation
Verifact® A:
- Omni-directional, within 30′ diameter circle
- Durable, high impact ABS housing
- Can be placed up to 1000′ away from the base station
5-Year warranty
Learn more
Audio Monitoring Notice

When this equipment is used as part of an audio monitoring system, the law requires that the public be given notice of AUDIO MONITORING ON THE PREMISES.
Two decal notices are included with each microphone shipped.
Federal Law References: Federal Regulations, US Code, Title 18, Crime and Criminal Procedure. Sec 2510.
Documents
Integrators
What's in the box
(4) Verifact A, IF-4, AD-1, (4) Single RCA Cable, (4) RCA to 3.5mm Plugs (All cable lenghts 6ft.)
Installation Requirements
BELDEN 8451 OR EQUIVALENT
Compatibility
- Encoders
- IP Cameras
- NVR
Placement
Use Cases
Banking
Education
Healthcare
Law Enforcement
Retail & C-Store
Security
Transportation
Specifications
Adapter Input impedance
17.5 KΩ@ 1kHz
Adapter Output impedance
600Ω@1kHz
Dimensions
11 1⁄2”L x 4 3⁄4”W x 1 1⁄4”H
Weight
12.5 oz
Microphone Type
Electret Condenser
Microphone Output
Line Level (0 dB 600Ω @ 1 kHZ)
Microphone Dimensions
4"Dia x 1 1⁄2"H
Microphone Weight
3.5 oz
Certified:
Product Comparison
96 products
Add Product
3’ Dropdown Mic Cable
6” Mic Element Assembly
Adjustable Gain Potentiometer
Audio Adapter Included
Audio Streaming
Audio Type
Base Station Included
Base Station Speaker Size
Built-in Preamp
Headphone Jack for Private Listening
Included Speaker Size
Install Environment
Mic Form Factor
Mic Type
Microphones in Kit
Mute Button
Mute Switch Included
Number of Zones
Pick-up Pattern
Pick-up Range
Playback Audio
Power Supply Included
Rack Mount Included
Requires Two-Way Base Station
Sensitivity Switch: Normal/Low
Speaker/Mics in Kit
Vandal Resistant
Voltage Requirement
Wire Distance
Wire Type
Add a product for comparison
Inquire About This Product
Have a question about the ASK-4® #304? Contact us directly.- Hidden
How to Buy
United States and Canada
Louroe sells products through a network of dealers and distributors across the United States and Canada. Find your local Louroe Distributor on the locator portal.
Find a distributorLatin America
Please contact LAR Group, the Louroe representative group for Latin America including the Caribbean.
Contact LAR GroupOther Worldwide Regions
For regions outside of North America, Latin America and the Caribbean, please contact Louroe directly at (888) 265-8474 or via email on our contact form.
Contact UsProduct Finder
Choose a product number or product name to be taken to the product page.