Attaching PVC to MDF

[Scarenius 10+ year member]

I have my ports in, I caulked the hell out of them, using it as a glue. What else can I do to secure them to the box? They sit in each corner of the box, touching 2 sides of the walls, see the attachment. Thanks.

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[skeptikal Premium Member]

screw the PVC into the MDF lol. i dont know what else you could do... also try titanium silicon.

 

[phrozen5100 10+ year member]

Two words - Gorilla Glue.

 

[LBX2G 10+ year member]

shit there is alot. Black silicone, first what i do not why do u guys make the holes so big.

 

[Scarenius 10+ year member]

Bigger holes = less air resistance. Gorilla Glue sounds good, but I checked this about 30 minutes ago, they aren't going anywhere. If they give ANY after the caulk fully cures, I'll gorilla glue them.

The wait to try my 15"s in a ported box is killing me.

 

[Shyne151 10+ year member]

I'd jus use liquid nails...

 

[LBX2G 10+ year member]

no, what i meant was why do u make the holes so big when u use the jigsaw.

 

[req 5,000+ posts]

I'd jus use liquid nails...

thats all i did with my girlfriends box, and its hanging fine.

i made the hole extra small, then sanded it down till i could barely fit the PVC in the hole. nice and snug.

sounds great and is working fine.

 

[Chance89 10+ year member]

thats what I did, cept with clear silicon too.

 

[Scarenius 10+ year member]

no, what i meant was why do u make the holes so big when u use the jigsaw.

Didn't use a jigsaw. Used a drill with a special bit for making in-home PVC holes, so it was about 1/16 inch too big.

But, here's the update!

**** hell shit **** and other such expletives! This setup sucks. The thing is half as loud as before, bass boost sounds like ****, and it's generally a very unpleasant bass! Oh, what to do.

I went to a local dealer. He brought up the specs for the sub. It want 10.5 cubes PER SUB to be ported. My entire trunk my be 10 cubes. Gah. They also want 5 something per sub sealed. Well, ****. I'm going to lose the ports and polyfill the sucker.

[documentation mode]

To "properly" (heh!) close off the port holes, I used a combination of black fleece cloth, MDF, Caulk, sheet metal, and screws. I first covered a piece of MDF cut to fit in the hole with fleece covered in caulk, then I shoved the entire thing into the port hole. To be sure that this would go anywhere, I cut pieces of sheet metal, and screwed them onto the box and the plug. If I can get a digital camera, I'll take pictures.

 

[Threshld1 10+ year member]

epoxy works wonders, fills gaps and strong as piss

 

[skeptikal Premium Member]

what the hell sub do you have that requires 10.5 cubes???? unless you are going for a strict SPL set up i wouldnt do more then like 4 or 5 cubes ported.

 

[skeptikal Premium Member]

actually homie imma show you waht this says right here

http://www.electronixwarehouse.com/car/sgl-prod/speakers/woofers/spl/elf-15.htm

^^ your sub correct ^^?

if it is here look at the specs...

SPL #ELF-15

15" 700 Watt Subwoofer

• 700 watts power handling

• 80 oz. magnet

• 2” kapton voice coil

• Dual 4 ohm voice coil

• Chrome plated basket

• Polypropylene cone

• Chrome front & back plate

• Foam rubber slant surround

• Black spider

• Chrome push terminals

• SPL 93 dB

• Sealed box: 2.5 cu. ft.

• Ported box: 4.25 cu. ft.

• Tuning: 29 Hz

• Port size: 3” (dia) x 3.2” (length)

• # of ports: 1

 

so i dont know if that guy gave you the total cubic feet and you just thought he said per sub or what. but 4.25 @ 29 hz sounds not too shabby. holla.

 

[Scarenius 10+ year member]

I'd seen most of the specs, a lot of those are new to me. Not bad for a 70 dollar 15" sub. The price has dropped significantly since I bought them.

As usual, the local shop was hella off. Some computer program they had with fancy charts and all that.

Anyway, the box is HISTORY. I seriously don't think I can repair it anymore. It's a cheap prefab, and the rest of my cheap equipment is blowing the thing apart. I'm going to get some MDF when I get the chance and just build a new box.