Input Signal Enhancer. Featuring meticulous tube modeling techniques, EC-1 offers a choice of two authentically reproduced preamp circuits that lend a subtle vintage character to your input signal. One is based on the classic EP-2 tube preamp and features an enhanced high-end shelf perfect for brightening up darker humbuckers. The other preamp option (the default setting) produces a warm, balanced response based on the modded preamp circuit in the EP-2 unit that we studied during the development of EC-1. This option adds a pleasing sense of heft, especially to single-coils. Both preamp choices offer an optional boost of up to +6dB, or the preamp can be bypassed for an unprocessed dry signal if desired.