The MXR MC-401 Custom Audio Electronics Boost / Line Driver pedal is a great clean boost for your pedalboard. The CAE Boost is great for boosting signal on long cable runs too. Check out the The MXR MC-401 CAE Boost / Line Driver.
MXR and Bob Bradshaw present the MC-402, a CAE Line Driver with an overdrive built in as well. The CAE Boost/Overdrive features the transparency of the Line Driver coupled with warm overdrive, from bluesy crunch to screaming lead!
The Dunlop MXR MC-404 CAE Wah Pedal is about as versatile as a Wah-Wah can get. Featuring two selectable voices and a built in line driver, the Dunlop MXR MC-404 CAE Wah Pedal is the one you have been looking for.
The Zakk Wylde Overdrive is your pedal. Looking for a great overdrive? How about a front end boost on your tube amp? From crunchy rhythm tones to screaming leads, MXR delivers the drive like a rock 'n' roll pizza boy.