What speakers.....

My 94 es d1 300tdi speakers are shocking (well the rear ones are) the front ones have been replaced but I'll want to replace them with all the same
What size are the fronts n rear pillars??? What are direct fit, i have a broad spectrum of music from led zeplin to euphoria aswell as playing movies for me and my little lad

Also my rear sub speakers in the door don't work (not that this makes a difference but is there a hidden amp or speaker wires?? My only other option is a little amp hidden in the rear door

speakers are 4" but 5" fit in the rear with a little fettling. The amp for the sub iirc is in the passenger footwell.

I put 6.5inch-17cm in the rear of my old 300tdi one with a little filing down but def 4inch in the front