POWER The MXR/CAE MC-801 BOOST/LINE DRIVER can be powered by one 9-volt battery (accessed through the bottom of the paddle, a Dunlap ECU-003 AC adapter {ECB-003E in Europe} or a Dunlap DB-10 DC Brick parer supply. For added headroom, the MC-401 can he operated on 18-val power by using a ECU-004 AC adapter {ECB-004E in Eu reps} or an 18-volt output of the DC-10 DC Brick power supply.