The Bubblesound Instruments Booster is a 2hp amplifier, great for bringing line level signals up to modular level. There are four channels each with an amplifier that boosts the amplitude of the incoming signals by a factor of eight.
The channels are normalized together, so one input can have up to four outputs. Routing the output of one channel into the input of another will result in some insane overdrive.
Four-channel amplifier for line level signals
Small form factor
Normalization cascades inputs for multiple outputs of one signal