Furutech uses a wide and thick stainless steel back strap.
No brass inside. Pure copper connectors, with stainless steel spring system. I discovered there is a reason for no brass in the device. Brass creates it's own distortion.... I got rid of every duplex and replaced them with the Furutech all copper..When I would add a brass plug, I could hear it creating a background buzz/distortion in the upper mids... So no more brass for me if I can help it.I switched to PC with all copper plugs...
No brass inside. Pure copper connectors, with stainless steel spring system. I discovered there is a reason for no brass in the device. Brass creates it's own distortion.... I got rid of every duplex and replaced them with the Furutech all copper..When I would add a brass plug, I could hear it creating a background buzz/distortion in the upper mids... So no more brass for me if I can help it.I switched to PC with all copper plugs...

