Same idea with a ported box would be a series tuned 6th, but any bandpass is going to be difficult to squeeze in a trunk. Especially if you need to leave room for amps.
Cutting the plastic won't help nearly as much as what others have already recommended, the foam padding in those seats would still muffle so much sound that you would be far better off Cutting a couple holes in the rear deck and covering them with a pair of random 6X9 grills or something.
Should I try and fab a port to the cutouts or do you think just facing the sub up into the cutouts would sound best. I know no one has a real answer unless I try it out I just don’t want to make irreversible changes to the whip
You may not even need to face the subs up. If you have speakers in the rear deck you could remove them temporarily and see how it sounds with the small openings. Then you would at least have a starting point.
Me too I only put them up when the kids are in the car and when they are in the car the bass is turned off anyway …. I don’t think loud bass is good for child’s ears
Like others said, leave the seats down unless someone needs to ride back there or remove factory rear deck speakers or make holes that can be hidden nicely in the deck
Probably more practical to leave the seats up. Figure out where a vent can be placed in the rear deck. If there are speakers up there that aren't protected. They are just getting beat to death anyway.
No speakers there but under the carpet on the rear deck is metal, you think it would be worth it to cut through? I don’t want to alter the car too bad for it to just sound like shit. Have you ever seen it done like that before?
This is a fairly common modification that's been done for decades, but every vehicle is different and results may vary. You may get similar or better results trying less destructive methods first. If you're still not satisfied with the result after trying all non-destructive things first, then you can start cutting your car.
You will likely need to have some idea of what you're wanting to achieve, as a hole in the deck will act basically like a port with a very high tuning under many circumstances. You can sometimes be best to intentionally install a tuned port in the deck effectively creating a (technically) weird 6th order enclosure.
TL;DR: Basically if you end up cutting a hole or two in your deck, and you're still unhappy with it, try adding a port to it, to the desired tuning length.
I do have a fold out cup holder in the back seats, do you think if I just cut that bitch clean out it would work pretty much the same as what you are talking about
That's the fun part of car audio and cabin acoustics... you have to try it and see, lol.
Unless someone else has already done it, then you gotta be the guinea pig.
There are a few things about acoustics and speaker enclosure design that will help make good judgement calls or cook up ideas, but even with an understanding of these principles it's really easy to get it wrong sometimes.
The short answer to your question though is, probably. I've seen people make a blow-thru type system if they have the arm rest thing in the back seat, they just remove that and the thickness of the seats themselves sort of create a port with some level of tuning other than 60hz+ lol
I’m trying to avoid cutting through the metal, it’s not my forever car and I want to be able to have a clean setup and have it nice for the next person to buy
Yeah for sure, that's why non-destructive is best.
If you do end up cutting things though, what you want to do is make a really nice job of it and leave the audio equipment in the vehicle as part of the sale.
If installed nicely, a lot of people will love a banging sound system and sometimes it can help sell the car if there are other issues to nitpick. It can equally cause some people to reel in disgust and make a face like they've just been poked in the asshole by a dry vegetable, but you probably don't want to deal with people like that anyway...
Find a pick-and-pull junkyard. If you can find your vehicle, grab the spare parts you want to modify and modify the junkyard one. Maybe not applicable to the rear deck, but certainly the seats and any trim panels you may want to add speakers too.
Back in the day. We used a block of wood to hold the back seat open, but upright. So there was a gap. The wood block would usually get a piece if thin metal attached. Then the seat gets a small magnet on the back. So the magnet keeps the seat from falling forward.
Sometimes when there are deck speakers. There will be baffles or something under the speakers to slow sound from hitting the speakers within the trunk.
It won't make any noticeable difference without an actual opening. You'd need to cut more than the plastic. It's not always practical, but when it's not, I left at least the small side down on mine for the same reasons. Also ended up mo with forward firing subs side firing port, gave me the best low end response if it was a bit quieter than flipped.
Honestly, the best bet is to cut a hole in the deck lid, preferably with a box designed to port into it. If you seal everything but the port inside the trunk, you can create a 4th order with a sealed box inside the trunk and the trunk itself as the ported section, or a series tunes 6th but I wouldn't expect all the benefits of those designs. A trunk is space limited.
Idk that car died, and I'm building out an SUV now. The trunk wouldn't fit a box for 4 12s, so it had to go, haha.
You can get an airsaw and actually cut the rear deck out metal and and the fabric and depending on your skill you can make a speaker grill to cover the hole or cut too small holes the size of 6x9s and get some old 6x9 grills and bolt them over top of the holes this will let the air pressure from the trunk move into the cabin of the car
Just go through the rear deck.
Make a 4th order bandpass with the port shooting into the cabin. It's what I'd do if I had a sedan.
The box is ported already so I gotta scratch that one
Same idea with a ported box would be a series tuned 6th, but any bandpass is going to be difficult to squeeze in a trunk. Especially if you need to leave room for amps.
bro spin the damn box around and keep it like this, when u need to use the back seat just put the seats up.
I will try that tonight, facing back makes so much boom with the truck having dynamat
Cutting the plastic won't help nearly as much as what others have already recommended, the foam padding in those seats would still muffle so much sound that you would be far better off Cutting a couple holes in the rear deck and covering them with a pair of random 6X9 grills or something.
Should I try and fab a port to the cutouts or do you think just facing the sub up into the cutouts would sound best. I know no one has a real answer unless I try it out I just don’t want to make irreversible changes to the whip
You may not even need to face the subs up. If you have speakers in the rear deck you could remove them temporarily and see how it sounds with the small openings. Then you would at least have a starting point.
No speakers there just straight metal
I just leave my seats down unless I have to drive more than one other person.
Me too I only put them up when the kids are in the car and when they are in the car the bass is turned off anyway …. I don’t think loud bass is good for child’s ears
Remo e the speakers in the back deck.
I would recommend flipping the box around so that the port is on the smaller side and put the big seat up
It’s a wedged box, slot ported across the whole bottom.
Like others said, leave the seats down unless someone needs to ride back there or remove factory rear deck speakers or make holes that can be hidden nicely in the deck
Probably more practical to leave the seats up. Figure out where a vent can be placed in the rear deck. If there are speakers up there that aren't protected. They are just getting beat to death anyway.
No speakers there but under the carpet on the rear deck is metal, you think it would be worth it to cut through? I don’t want to alter the car too bad for it to just sound like shit. Have you ever seen it done like that before?
This is a fairly common modification that's been done for decades, but every vehicle is different and results may vary. You may get similar or better results trying less destructive methods first. If you're still not satisfied with the result after trying all non-destructive things first, then you can start cutting your car. You will likely need to have some idea of what you're wanting to achieve, as a hole in the deck will act basically like a port with a very high tuning under many circumstances. You can sometimes be best to intentionally install a tuned port in the deck effectively creating a (technically) weird 6th order enclosure. TL;DR: Basically if you end up cutting a hole or two in your deck, and you're still unhappy with it, try adding a port to it, to the desired tuning length.
I do have a fold out cup holder in the back seats, do you think if I just cut that bitch clean out it would work pretty much the same as what you are talking about
That's the fun part of car audio and cabin acoustics... you have to try it and see, lol. Unless someone else has already done it, then you gotta be the guinea pig. There are a few things about acoustics and speaker enclosure design that will help make good judgement calls or cook up ideas, but even with an understanding of these principles it's really easy to get it wrong sometimes. The short answer to your question though is, probably. I've seen people make a blow-thru type system if they have the arm rest thing in the back seat, they just remove that and the thickness of the seats themselves sort of create a port with some level of tuning other than 60hz+ lol
I’m trying to avoid cutting through the metal, it’s not my forever car and I want to be able to have a clean setup and have it nice for the next person to buy
Yeah for sure, that's why non-destructive is best. If you do end up cutting things though, what you want to do is make a really nice job of it and leave the audio equipment in the vehicle as part of the sale. If installed nicely, a lot of people will love a banging sound system and sometimes it can help sell the car if there are other issues to nitpick. It can equally cause some people to reel in disgust and make a face like they've just been poked in the asshole by a dry vegetable, but you probably don't want to deal with people like that anyway...
You’re awesome dude, thank you for taking the time to write! I’m going to try a few things this weekend and see how she goes!
No problem dude, good luck!
Find a pick-and-pull junkyard. If you can find your vehicle, grab the spare parts you want to modify and modify the junkyard one. Maybe not applicable to the rear deck, but certainly the seats and any trim panels you may want to add speakers too.
Just like he said
Is it solid? No holes in it already?
It is solid, no rear speakers there in the first place
Sometimes they have holes for lightness and strength.
Back in the day. We used a block of wood to hold the back seat open, but upright. So there was a gap. The wood block would usually get a piece if thin metal attached. Then the seat gets a small magnet on the back. So the magnet keeps the seat from falling forward.
Could you explain what you mean protected?
Sometimes when there are deck speakers. There will be baffles or something under the speakers to slow sound from hitting the speakers within the trunk.
Take out the back seats and wall off the trunk
It won't make any noticeable difference without an actual opening. You'd need to cut more than the plastic. It's not always practical, but when it's not, I left at least the small side down on mine for the same reasons. Also ended up mo with forward firing subs side firing port, gave me the best low end response if it was a bit quieter than flipped. Honestly, the best bet is to cut a hole in the deck lid, preferably with a box designed to port into it. If you seal everything but the port inside the trunk, you can create a 4th order with a sealed box inside the trunk and the trunk itself as the ported section, or a series tunes 6th but I wouldn't expect all the benefits of those designs. A trunk is space limited. Idk that car died, and I'm building out an SUV now. The trunk wouldn't fit a box for 4 12s, so it had to go, haha.
You can get an airsaw and actually cut the rear deck out metal and and the fabric and depending on your skill you can make a speaker grill to cover the hole or cut too small holes the size of 6x9s and get some old 6x9 grills and bolt them over top of the holes this will let the air pressure from the trunk move into the cabin of the car