Just about a month after getting my first class D, I now have two. I love the Primare I32; but it has no acceptable option for headphones. So I got a little Topping TP30 Mk2 which accepts input from the I32's Pre-out and has headphone and speaker outs. I can connect conventional headphones in the conventional way and my Stax electrets to the speaker terminals. It works and sounds quite nice, except the I32 does not have a speakers on/off switch, since it only has one set of outputs. I need a quick, convenient way to disconnect the main speakers, which are bi-wired and a PITA to connect via bare wire, without compromising the 12G speaker wire. As much as I wanted to avoid bananas, I ordered some stackable ones yesterday.