Touch Response™: This Trainwreck Engineered™ circuit enables the musician to alter the touch response characteristics of their amplifier to suit their playing style. A simple flick of a switch lets you choose between a gradual or fast response to your picking dynamics and guitar's volume control settings. The Touch Response™ circuit is not an extra gain stage or gain boost circuit. Instead it works by magnifying subtle changes in pick or finger attack along with subtle changes in guitar volume. This circuit allows a clean player to run the full range of dynamics without breaking into unwanted distortion. A blues player can play on the edge of distortion easily going from clean to blues overdrive using pick attack as the controlling factor. An over the top player can go from clean to scorch using the fast setting. The slightest change in pick attack or guitar volume setting will translate to huge changes in dynamics and power. To sum up, the Touch Response™ circuit lets you choose the response and feel you want and makes your amplifier capable of playing every style of music.

Bias Test Points: allows you to easily set the amplifier's power tube bias using the test points with a standard digital volt meter with an mV setting. This facilitates monitoring the output tube bias range without having to open the amplifier.

Bias Control: A precision 10-turn dial with a scale from 1 to 100 with a brake lever to lock it in place. The bias dial allows the user to switch between different sets of tubes without having to use a meter to set the bias each time. Once you have found your favorite bias setting (for a particular set of tubes using a digital volt meter), make a note of the dial setting. When you use that particular set of tubes, simply set the dial to the predetermined number.