I have a 95 Cadillac deville with trunk measurements of 47x23x17.5 I trying to figure out the best box for 4 dual 1 aa mayhems if anybody has any good feedback would help out a lot

I hope that's 4 10s because anything bigger, it won't sound good at all with 4 installed.

4 12'

unless you wanna run them in about 1.3-1.5cuft per sub, it's not ideal.

based on your deminsions you have enough volume. Port will be less than optimum but doable. post some pictures of your trunk.

gotta clean it out first but I will get some up asap