The AT+ was developed to help Andy Timmons get his own lead and rhythm tones. Andy Timmons signature overdrive pedal. Andy purchased the Angry Charlie in 2013 and began using it as his main tone. I immediately contacted Josh Scott at JHS Pedals and asked him to modify it to suit my needs. After much trial and error to suit Andy's taste, @ was born and released in 2016. This pedal offers a wealth of tonal options for a variety of players, You'll get the extreme overdrive and distortion that Andy produces. The AT+ maintains the AT's control and sound nuances without altering them. This is a 2-in-1 pedal with an independent booster coupled to the front stage. It can also be used as a gain booster in combination with the drive section. Produces a more intense distortion sound. If you connect it to the input of a tube amplifier and use it as a standalone booster, you can drive the tube amplifier by increasing the input gain. ■Specifications Input/Output Terminals: Input, Output Controls: VOLUME, DRIVE, EQ, AIR, BOOST, Mode Switch (25W, 50W, 100W) Power supply: DC9V center negative