From the Head Vex himself: I've never really liked the sound of distorted Fender amps (this is Zack pontificating) except for my earliest amp, a blonde Fender Bassman with a 2X12 cab that just rip roared pure tinnitus joy. But there is one Fender that blows that one completely away, and that's a '59 Bassman. I guess the way it affected Jim Marshall was similar, back in the 60s, because he used it as the template for the first Marshall amps. So it's not out of the realm of possibility to imagine that the ZVEX Box of Rock, which accurately models the Marshall JTM45 amps, could be modded to sound like a '59 Bassman. Tommy Rehbein, our customer service specialist, tackled this particular concept and listened closely to a '59 Bassman for a few days and tweaked components in our BOR until he got that magical '59 Sound worked out... and now we're offering it to you. Check out the video and see if this is a sound you've been searching for. It's pretty amazing, especially when you use your guitar's volume control to explore it's wide range of textures. Pedal Dimensions (LxWxH): 4.70" x 2.38" x 1.82" Hand painted pedals feature a lifetime warranty. Colors and details may vary. • MFSKU 59 Sound • UPC 855245003602