Aer Colourizer 2

AER Pocket Tools Colourizer 2 is a preamp with extremely powerful tone shaping tools that allows you to plug in an instrument or microphone and really tweak the tone, and then route that signal to the mixing board, recording console, or amplifier.
It gives you the ability to adjust all of the frequencies with its parametric EQ so you can get both the tone you want and, worth the price of admission alone, eliminate unwanted frequencies or resonance peaks (notches) that cause feedback. This is one of the most essential pieces of gear you can have. Especially for players who go directly into the PA or using someone else's gear.

The three tone shaping sections on the Colourizer are Tone, Enhancer, and Equalizer.
The Tone section works like a normal tone knob except that you can adjust the level of the adjusted tone mixed with your unadjusted tone. This is a great feature and it works really well. The Enhancer section has its own level control as well and seems to just make everything sound better. It is kind of like the old-school 'loudness' button on stereo systems that just made everything sound better (at low volumes), and then once you get used to the sound, everything sounds anemic if you turn it off.