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2 Zone Independent Line Level Audio Interface Preamp with 12Vdc Output

IF-2/LE-273 is a two-zone independent audio interface preamp with individually adjustable 0-10db gain controls. The IF-2/LE-273  provides independent power for two separate Louroe line-level type microphones. Each channel’s inputs and outputs are independent of each other. Used for connectivity to multiple DVRs, NVRs, IP cameras, encoders, or analog-digital audio recorders. The IF-2/LE-273 can extend two separate Louroe Line Level microphones up to 1,000 ft.


  • Two-zone independent line-level audio interface preamp
  • Provides 12Vdc power to all Louroe line-level microphones or 3rd-party hardware
  • Zone 1 & Zone 2, independent 0-10db adjustable volume controls
  • Two 3-position terminal block Inputs and two RCA output jacks
  • Compatible with most recording devices that accept line-level audio input
  • 2 Position dip switch for turning on/off channel 1-2 audio signal present/test red L.E.D. indicator
  • Green 12Vdc power L.E.D.

Power and Cable Connectivity:

  • Requires 12Vdc external power, AD-1 (Included), DC Power Supply AD-1, LE-242, Click Here)
  • For long cable distances or making your own custom cable assemblies, use Belden 8451West Penn 452, or similar 1-2 conductor shielded cable for audio connectivity

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.

Included in: ASK-4®#302
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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 IF-2, AD-1, 2 x Single RCA cables, 2 x RCA to 3.5mm male cables (All cable lenghts 6ft.)

Installation Requirements

For long distance connectivity, use BELDEN 8451 or equivalent shielded audio cable.


  • Encoders
  • IP Cameras
  • NVR
  • Recorders


Use Cases


Input Signal:
Line level
Channel Inputs 1-2 Connectors:
3 Position terminal block, (A) 12Vdc output, (B) Audio input, (C) Ground
Output Signal:
Line level
Output Connectors:
1 x RCA jack
Adjustable Volume Control:
0-10db, Channels 1 & 2
Power Input:
AD-1, Plug-in 12Vdc, 1.5A Switching AC Adapter, Positive Center
Power Jack:
2.1mm x 5.5mm DC coax
6.125″ L x 4.625″ W x 1.375″ H
1 lb

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Have a question about the IF-2? 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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