The Archer Ikon from J. Rockett Audio Designs is sort of a two-in-one guitar pedal. It can be used as just a clean boost by turning the gain all the way down. As you introduce gain, it will attenuate the clean signal, but there is a magical blend in between that you will find.

•Power: 9V
•9 volt negative tip adaptor and a 5.5mm x 2.1mm jack
•9 volt battery
•True Bypass
•Dimensions: 4 x 2.3 in.
•Made in the U.S.A.