LGB-1 Line Level Gain Booster


Increases the line level output by up to 12dB for any audio component with an inherently low level output, such as that found with the headphone output jack of a smart phone, computer sound card, etc.

Simply connect the line level output on the source device to the input side of the LGB-1 using a stereo 3.5mm or RCA-type patch cable. Similarly connect the output side of the LGB-1 to your amplifier, receiver, or whole-house audio controller.  Increase the level by adjusting the recessed Left and Right knobs from 0 dB to 12 dB.

12V power transformer included.

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We designed the LGB-1 to solve an increasingly frustrating problem - how to get a quality line level output from a portable or computer device that is as strong as the signal typically found with a good CD player. Most smart phones, tablets, MP3 players, and many computer sound cards output a signal through a jack that is suitable for headphones, but rarely more than that. When plugging these devices into a home audio system, the flaw is easily noticed. The LGB-1 brings the output level of these small devices up to a level suitable for your "big" home audio equipment.

The LGB-1 has a full adjustment range of -12dB to 0 to +12dB.  So in addition to increasing a weak signal, you can also attenuate a stronger than normal signal.


  • -12dB to +12dB adjustment range of input signal
  • Inputs: 3.5mm stereo, RCA-type stereo
  • Outputs: 3.5mm stereo, RCA-type stereo
  • Recessed, independent level control for Left and Right channels
  • 12V transformer included

Owner's Manual

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