Here’s a vintage 1980 MXR Micro Amp electric guitar boost/effects pedal. This particular example, serial number 33-011768, is in MINT all original condition and includes the original box as well as the original Operation Manual. The Micro Amp essentially adds a gain boost in the signal chain perfect for lead work or to provide a permanent boost in a long effects chain where signal drop off is an issue. This example is in perfect working order. The Micro Amp has been used by such greats as John Sykes, Doug Aldrich, John Frusciante, and John Norum.