Console or other surface for amplifier and turntable

Oh Yeah, rear access and ventilation.

I like bigger rear holes, often cut my own, to see and reach the back of a big AVR is a PITA.

One problem is when looking thru big rear holes, you can see wires in front of a light colored wall behind the rack.

I made a sliding/removable back panel that is the same dark color and blocks light getting back there

https://www.audiogon.com/systems/12369

BTW

that entire cabinet is on small 3 wheel casters in each corner behind the skirt. It floats 1/4" above the floor, rolls out easy, no marks in the floor, not even fastened, get help lifting each end one end at a time, the weight keeps them in place, figure out the height, add some wood the right thickness so a small clearance you never notice results.

https://www.homedepot.com/p/Richelieu-Hardware-6-7-16-in-164-mm-Three-Wheel-Dolly-with-200-lbs-Load-Rating-F29317/301656440

 elliot, you dirty dog !

Oh Yeah, rear access and ventilation.

I like bigger rear holes, often cut my own, 

lol

My Salamander rack came with back panels, but I didn't use them.  The rack is rock solid without them.  Trying to route heavy power cords wouldn't have worked with a back panel. Yeah, you can see the cables, but I don't care. 

I bought casters for my rack so it can easily be moved. 

I also bought extra shelves and a pull out drawer that my turntable sits on.