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Audio Monitoring Kits
Audio Monitoring Kits

ASK-4® #501


The ASK-4® #501 is a single zone audio monitoring system for two-way audio. The TLM-W remote unit contains a Verifact® line level microphone and a speaker, all within one housing.

The AP-1TB desktop base unit produces live audio and playback functions. Talk from the base unit to remote speaker/microphone is engaged by toggling the “hold to talk” switch and speakinginto the built-in microphone. A person at the remote speaker/ microphone can listen and talk hands-free.


  • Desktop base station with built-in microphone and speaker
  • Line Level input/output (RCA jacks)to NVR for recording and playback
  • Volume control for both listen and talkback


  • Microphone and speaker mounted within ABS enclosure
  • Omni-directional microphone, within 30′ diameter
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5-Year warranty
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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.


What's in the box

TLM-W, AP-1TB, AD-1, Dual RCA Cable (6ft.)

Installation Requirements



  • NVR
  • Video System

Suggested Placements


Mic Faceplate
6.8”L x 5.12”W x 0.5”D
Mic Backbox
6.92”L x 5.12”W x 1.62”D
Mic Weight
13 oz
Base Station Dimensions
7.9”L x 6.6”W x 2.4”H
Base Station Weight
2 lbs 3 oz

Product Comparison

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3’ Dropdown Mic Cable
6” Mic Element Assembly
Adjustable Gain Potentiometer
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

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Inquire About This Product

Have a question about the ASK-4® #501? Contact us directly.
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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.
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Latin America
Please contact LAR Group, the Louroe representative group for Latin America including the Caribbean.
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Other 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.
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