LGB-4 Line-Level Gain Booster for 4 Sources


Increases the line level output by up to 12dB for up to four audio components. Simply connect the stereo line level outputs (using stereo RCA-type connectors) to the stereo inputs on the LGB-4. Connect the four stereo outputs on the LGB-4 to inputs on your amplifier, receiver, or whole-house audio controller. Adjust the level knob for each device until all four outputs are at the same volume level.

Can be rack-mounted with included dog-ears.

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We designed the LGB-4 to solve an increasingly frustrating problem - how to get the same output level from multiple devices, especially when some devices have inherently low outputs (such as smart phones, tablets, portable audio players and even some media streamers and computer sound cards). The LGB-4 is a perfect partner for whole-house audio systems that include multiple audio inputs. The LGB-4 significantly reduces the volume level changes that otherwise occur when switching between sources.

Each input/output combination on the LGB-4 actually has an adjustment range of -12dB to 0 to +12dB. So you can also attenuate a stronger than normal signal.


  • Independent -12dB to +12dB adjustment range of input signal for up to 4 audio sources
  • Inputs: RCA-type stereo
  • Outputs: RCA-type stereo
  • Attached 110V power cable

Owner's Manual

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