Ernie Ball MVP Volume Pedal w/ Tuner Output 

The Ernie Ball MVP volume pedal is a powerful tool to put in your guitar's signal chain. Whether you put the MVP in front of your amplifier or in its effects loop, it gives you smooth volume control with no high-frequency loss at any volume. Even better, the minimum volume control lets you set the heel position from 0%-50% volume, and you can actually set the toe position to boost up to 20dB to hit your amplifier or pedals harder. Factor in the separate tuner output, and you may find that the Ernie Ball MVP is your new go-to volume pedal.