Adamson A/C Panel The Adamson A/C Panel is designed to power Lab.gruppen amplifiers. 3 X 6400 and 2 X 6400 is the amplifier configuration you need to power 8 Y10's with a T-21 Sub or 4 Y18 with a T-21 Sub. The input can be modifed for your unique needs. The outputs consist of 3 x single receptacle Hubbel TL3 30A (nema L5-30R) and 2 x duplex receptacle standart 20A. 1 duplex receptacle is located at the front for utilities. The Adamson A/C Panel occupies a 2 unit rack space and is 19 inches wide.