15VDC Power Supply, 16 Channels, Rack Mounted. Power supply for the Amplified Speaker Models AMP1SGRN, two-source self-amplified speakers, AMP-HD, AMP-R2SIC5, AMP-R2SIC6, AMP-BT2SIC5, AMP-BTSIC6, AMP-BTSM, AMP-BTPEN and MC4DNGL.