Ported Box, Alpine Type R

[Buck 5,000+ posts]

Meh, that's not optimal IMO.

 

[Qexler 10+ year member]

I mean, I am very VERY thankful for your help. And you know a lot more than me about this lol...

I'm not going for 100% optimal. but if thats what the alpine website is saying it will work in my box if i add a 25" round port for 35hz right? I am mainly scared it will blow my woofer like the other enclosure did (fierce audio ported truck box) i put a picture of it above.

its port was at the bottom of the box and was a 1 inch tall 5 inch wide 8 inch long tunnel.

But my idea was to get the port up by the head rests so you could feel the air movement.

 

[Buck 5,000+ posts]

You could do a single 4" flares aeroport and do the full 18" length and get a tuning between 33-34. I would take a 4 inch flared over 5 inch no flare.

 

[Qexler 10+ year member]

I take it aeroport is meaning the port is extended completely outside the box and not inside, and by flare you mean make the end of the pipe flare outwards.

So 18" tall straight out the top of the box with a flare and 4" diameter tunnel?

Would it add some air movement and bass?

 

[Buck 5,000+ posts]

I take it aeroport is meaning the port is extended completely outside the box and not inside, and by flare you mean make the end of the pipe flare outwards.So 18" tall straight out the top of the box with a flare and 4" diameter tunnel?

Would it add some air movement and bass?

Hopefully //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Qexler 10+ year member]

Aiy, I can do that easily!

At the worst it will just sound the same huh?

 

[Buck 5,000+ posts]

Aiy, I can do that easily! At the worst it will just sound the same huh?

Will that small of a box, it's possible you might bottom out easily so be careful.

 

[Qexler 10+ year member]

Meaning if i get that bad farting/knocking noise turn the gains down, right?

 

[Buck 5,000+ posts]

Meaning if i get that bad farting/knocking noise turn the gains down, right?

It's more like a knocking noise than a farting noise. Been there done that before //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

You'll know when you hear it.

 

[Qexler 10+ year member]

Aero ports are far more superior to any normal wood port though arent they?

 

[Buck 5,000+ posts]

Aero ports are far more superior to any normal wood port though arent they?

That's a tough question to answer. It depends on what perspective you are looking at. They take up less volume and can be overall smaller because of the less surface area in the port per square inch of port. But it's hard to find the perfect ratio because they only come in 3", 4", 6", etc where you can adjust a square/rectangular port by any measurement you please. Aeroports are also harder to bend, they don't provide bracing in the box, and they are generally more expensive.

 

[Qexler 10+ year member]

Price wise, I was mentioning PVC pipe because I was just going to drill a hole 4" in the top left hand corner of the box and drop that pipe down in there and glue it. Possibly put 1lb of polyfil in the box to consume some of the air?

 

[chillin 10+ year member]

What do you have the low pass filter set to on your amp. When you have a ported box you need to make sure you set it at the same frequency as box is tuned to or you will bottom out easily and blow your subs

 

[Buck 5,000+ posts]

Price wise, I was mentioning PVC pipe because I was just going to drill a hole 4" in the top left hand corner of the box and drop that pipe down in there and glue it. Possibly put 1lb of polyfil in the box to consume some of the air?

Polyfil would be good in your situation.

What do you have the low pass filter set to on your amp. When you have a ported box you need to make sure you set it at the same frequency as box is tuned to or you will bottom out easily and blow your subs

You don't have to set it at the same frequency your box is tuned at. All the people that tune their boxes at 38 hz would be shit out of luck.

 

[Qexler 10+ year member]

Looking into what you said, I think I will buy some MDF boards 1" thick and just build a 2 cb ft box.

And drop a much wider port in it set to 30 hz?