The MC401 is simple in design but superbly effective in solving a variety of mismatched line level and signal conditioning problems that can occur when combining effects. The MC401's circuit design has been used for years by CAE in the world's best guitarist's rigs to remedy these problems and rejuvenate the sparkle, punch and brilliance that can be lost. It can also be used as an ultra-clean boost (up to +20dB) for solos or to drive effects for more dynamics and sensitivity.
Power: Single 9 volt battery, ECB003 AC Adapter or ECB004 AC Adapter for 18 volt operation (for increased headroom)
And for those of you who like the idea of the extra headroom, here's a version with a charge pump and a 9V/18V switch.