EF/EL Door Measurements

Hole size: 126mm
Width around hole: 160mm ( recessed section around hole)

Allowing 2-3mm gap to clear the window the following is a guide to the max mounting depth allowable
Depth @ top of hole 60mm
Depth @ centre of hole 70mm
Depth @ bottom of hole 72mm

If you use a 12mm MDF spacer ring then the maximum depth in hole centre is 92mm. Below is a 4" midrange mounted on a 6mm MDF spacer with rubber under one side to give it an angle

Max depth speaker you could fit into the door and still have the window wind up and the door skin fit on would be 92mm deep in the middle.

An additional spacer ring can be made up to 12mm thick and this gives an additional 12mm mounting depth without fouling on the standard door skin and allow the mounting of 6.5” speakers. Alternatively you can use 9mm MDF and use some rubber under the front edge to give it some backwards angle (which is desirable) Even a few degrees can make a big difference.