I've got a J-Station coming in that I plan on using pretty much just for my Fender P-bass. It has a compressor with Threshold (-50dB to 0dB), Ratio (1.1:1, 1.2:1, 1.5:1, and 2:1 to 10:1 and an inifity:1), Gain (0dB to 30dB), and Frequency (50Hz to 800Hz then 1kHz to 3.15kHz to "full range")...