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Audio Base Stations
Two-Way Listen-Talk



4 Zone 2-Way (Talk/Listen) Base Station

AP-4TB is a four zone non-alarming audio monitoring base station with listen and talkback. As a system (with Louroe speaker/microphone hardware), it provides live audio monitoring from four zones, one at a time or any combination of the 1-4 channels. Built-in speaker and microphone for 2-way communication to zones 1-4 or any combination of the 4 Zones. Easy zone selection,  by individual on/off push buttons. Model AP-4TB is designed to interface with a video system, NVR, or computer. Selectable on/off pushbutton filtering circuitry enhances the sound quality of audio during playback. For the rackmount version, request model AP-4 TB-RM


  • Four-zone listen and talkback audio base station
  • Built-in microphone and speaker
  • Individual on/off push buttons for each channel, 1-4
  • RCA input/ output to NVR or other devices for recording and playback
  • Volume control for both listen and talkback
  • 3.5 mm headphone jack for private listening
  • The AP-4TB can be located up to 1000′ from the Louroe speaker/microphone hardware

Cable Connectivity:

Explore other 2-Way Talk/Listen Base Stations: Click Here

Technical Design and Project Layout Support

Need help with using Louroes products/technologies in your projects and designs? Need us to look at Architectural Drawings and Plans? Our engineering staff can provide you with valuable information, and support to your business and employees by helping with all your projects/proposals. We will assist you from start to finish with cost-effective solutions for your success.


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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

1 x AP-4TB, 1 x Dual RCA Cable (6ft.), 1 x Owners Manual/Instructions

Installation Requirements

Requires one of these 3 cables, 1.) Belden 9155, 2.) Belden 9418, 3.) Westpenn 356, or similar 4-conductor shielded cable


  • NVR


Use Cases


Input Sensitivity (Talkback Microphone):
Monitor Power Output:
1W @ 8Ω
Talkback Power Output:
1.5W into 70V line
Audio Output Impedance:
Audio Input Impedance:
Audio Frequency Response (Flat):
100 Hz to 10kHz
Audio Frequency Response (Enhanced):
-20 dB @ 200 Hz to +8dB @3 kHz
Headphone Impedance:
8 to 600Ω
Power Input:
120 Vac, 60Hz
Rear Chassis Fuse Protection:
¼ A slow-blow
10 1⁄4"L x 12 1⁄2"W x 2 1⁄2”H
8 lbs 6 oz

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Have a question about the AP-4TB? 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.
  Find a distributor
Latin America
Please contact LAR Group, the Louroe representative group for Latin America including the Caribbean.
  Contact LAR Group
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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