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Earthquake's new IWS Stereo Balanced In-Wall Pre-amp packs flexibility, power, and control all into one small and very discrete package. The IWS was designed to receive an input signal from the front panel 3.5mm line input and send it to the BTA-250 (sold separately) for amplification via a CAT5/6 cable. Through the use of a Cat 5/6 cable, the IWS will utilize Earthquake’s HVBT (High Voltage Balanced Transport™) to send power and signal over Ethernet making the BTA-250 virtually immune to input signal noise.

The IWS can be powered by a CP2425 12–24VDC power supply (sold separately) that can either be plugged into the front panel or hard wired to the phoenix connector on the back of the unit. Designed to fit into most standard single-gang junction boxes, the IWS can be easily installed into any new or pre-existing constructions (homes, bars, restaurants, garages, hotel rooms, etc.). It will make listening to your favorite music or movies in any room possible.

Note: Earthquake uses a proprietary CAT 5/6 port configuration and is available upon request.

Sold and priced per piece.

In The Box:

  • 1 x IWS In-Wall Pre-amp


  • 2-Channel Balanced Output Pre-amp
  • High Voltage Balanced Transport™
  • Easy Installation
  • Multi-Room Solution
  • Up to 200ft Noise-Free Audio
  • Works with Earthquake BTA-250 In-Wall Amplifier


  • Model No: IWS
  • EAN: 0689759001843
  • Cat 5/6 PoE + Signal
  • Input: 3.5mm Stereo Line In
  • Output: 4 Volts Balanced
  • 12–24VDC Power Input
  • Power Range: 12–24VDC
  • S/N: 105dBA


  • Height: 115 mm
  • Width: 70 mm
  • Mounting Depth: 44.45 mm
€ 54 w/o VAT
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