Empirical Labs EL8 Distressor Compressor
The Distressor electronically controls the volume of just about any source in a very pleasing, and "musical" manner - adding fullness, intelligibility, and especially in the Distressor's case - excitement

Empirical Labs EL8X Distressor Compressor
The Distressor electronically controls the volume of just about any source in a very pleasing, and "musical" manner - adding fullness, intelligibility, and especially in the Distressor's case - excitement.

Empirical Labs EL7 Fatso Stereo Audio Processor
This two channel audio processor will musically integrate frequencies and transients and increase the apparant volume without actual increase in peak levels.