Mr. Black’s Boost Tiger delivers 20 decibels of clean preamp gain to boost your amp to the top of the food chain. Unity gain gives you color and clarity, push it a bit for transparent overdrive, or put it in your effects loop for a lead boost that roars.
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.
Kick your playing into high gear with the TC Electronic Spark Mini Booster, a stompbox-wonder for the initiated that features a completely clean boost with some serious tone enhancement under the hood once you really start cranking things.