Our SA450, 600, 750, 900 standard boards are now fitted with two Connector Box holes left and right, 350XDM - with three, 550XDM, 675XDM and 750XDM with four. This gives you the possibility of having a combination of Connector Boxes and/or our new Socket Plate. This is a stainless steel plate that fits into the Connector Box appeture with up to three alternative sockets installed ie. XLR, MIDI, USB, Jack etc. The plate and it's fixings costs €35 and the sockets themselves generally €25 each (MIDI €35). If you decide that you want to have one fitted (on either side) then just let us know and we'll plan the best combination for you and also install internal cables with appropriate plugs where required.