The four channel powerhouse also finds space in the flat slimline aluminium heat sink used for the power core range of products stable at two ohms it comes with ample power reserves should this not be enough a channel mode switch will switch from four channel to two channel mode a dupe circuit directs the audio signal from channels 1 and 2 with identical filter settings to channels 3 and 4 the low level outputs with sum signal from channels 1 to 4 allow a subwoofer amplifier to be connecte