HI i have an 02 5 door a3 non bose system i want to change the speakers i know that i can fit 6.5 coaxis in the rear but im not sure about the depth restriction i am thinking of fitting Radioactive GZRF 65XII and fitting Iridium GZIC 525X for the front will all be wired to jvc kd r520 headunit

any one know what the depth restriction is or recommend any speakers that will fit Thanks