This isn't going to be short and I'm incredibly sorry.
I have a 95 Nissan 240sx. Tiny 2 door sports car. About a month ago, I bought 4 SA 8s. One needs a recone, and if anyone has seen my other thread, 2 of the others might as well.. we will see. I had RAM designs do me a box for 3 of them since the 4th one wouldnt fit because of the slot port. I have built the biggest box possible OUTSIDE of my trunk that will still fit into my trunk. It 1.8 cu ft with a slot port tuned to 33 hz. But I want to fit the 4th SA8, and heres where it gets a bit tricky.
So Im going to need a new box. Heres the old box design.
Heres a crappy drawing of my trunk specs (yes, its tiny)
And heres that box in my trunk as of right now. Only difference is right now the box is flipped the opposite way (subs and port facing drivers seat) at the very very back of my trunk (towards bumper)
And heres a video of what it sounds like as of right now..
Car falling apart - YouTube
It sounds good until I hit about 36 volume and at that point things start rattling so bad it sounds awful. Before then there is no noise that can be heard from the drivers seat. My rear deck flexes because of all the air trying to make it from trunk --> car... even with my rear seat folded down it just seems inefficient. I cant fit a 4th order, no way. Battery in trunk as well as amps.
Heres what I want to do and what I need help with as well as opinions, since this is what I want to do and what may not be best.. I want to build another box, almost to the same dimensions as the one I have now. I cant go bigger.. it will not fit in my trunk. I want to use external aero ports. I think 2 4" aeroports will work good. Cant do bigger because port will be too long.. I want to stay around the 30-33hz tuning. Im at 33hz now and its fantastic but I could stand to have a bit more lows, but only if its doable.. I may not be able to make the ports long enough for lower tuning to happen. Ill do some measuring and find out tomorrow.
Heres the kinda tricky part and Im not even sure if its doable or how it would sound, but I know it would look cool if I can pull it off and still look clean. I know if I were moving more air from trunk --> car I would be getting less rattles from my rear deck (maybe staying clipped in?) and it should be a bit louder. I cant seal off my trunk because of its odd shapes and trunk hinges as well as trunk springs. I CANT do any sort of blowthrough my seats because all they do is fold down is a unit. Driving around with them folded down is stupid.
However.. has anyone ever seen someone cut a hole in their rear seat (I'll buy another rear seat for this, Im not modifying mine) and put aeroports flush with the cover which runs back to the box in the trunk? Im not even sure how it would sound, but it *should* be the same as doing a blowthrough with aero ports, just look cleaner.
Thats my idea. I want the box at the very rear of the trunk like it is now, all 4 subs facing drivers seat, and them seperated in the middle by the aeroport. I dont know if its OK for an aero and the subs to be on the same face of the box, nor do I know what size/how long of an aero to use, or tuning.. which is why Im asking here. I do know that the port will probably be around 20-26" long max. I'll measure tomorrow and see how long I can get it AND if this is even possible! My trunk opening is FRIGGIN tiny and Im not sure if theres even enough space for 2 4" aeros! Im praying there is.. could someone measure the OD of a flared 4" aeroport for me? Is it something like 5"? I may have to put them next to each other, and even then.. not sure if its possible. I'll do some measuring tomorrow.
Heres a crappy photoshop picture for what I want to do
But I may have to do it like this.
Will this sound good? Loud? Bad? Terrible idea? Just trying to figure out how to fit these 4 8s in my trunk, without building a bigger box, or building a box in my trunk, AND at the same time getting more bass from trunk --> cabin. Opinions? Thoughts? Thanks all, hopefully you read this far. lol
If anyone thinks theres a better way to achieve what I want, speak up! I really need to stick with 8s so I dont lose a ton of cash. I want louder in the car and less bass stuck inside my trunk!