You don't hook them up directly to the CLXs. You either run RCA or XLR from your preamp, or run them of your amp. If you have Descent i or BF ML Subs, you download the the custom crossovers from the ML website and upload into the sub with a USB stick. Then you can also make custom bass response filters for your room with the PBK kit. The result is spectacular for me.
CLX ART with 2 sub connections
I have a stupid question. I’ve heard great things about the Martin Logan CLX Art and wanted to invest in a pair. But upon looking at the connectors in the back of the speakers, I see no connection to external subwoofers. I read that they have some sort of “custom filters” I can get to hook up to a pair of descent i or the balanced force. Yet, I see no speaker wire connections to the subs (they only take RCA or XLR). So how do you go about hooking up a pair of subs to the CLX Art? Thanks!