The EDI is a different approach to taking instruments direct into a sound reinforcement or studio mixing console. This equalized direct system will solve many problems usually associated with tonality when instruments are fed directly into large sound systems. Most “direct” box-type units are designed to work with the instrument’s signal, before the amplifier or with a line output from the preamp. The main problem with this concept is that the tone coloration, which is generated by the power amp/speaker system, is totally bypassed, and the “direct” hook-up yields an electronically “dry” tonality.