REVscene Automotive Forum

REVscene Automotive Forum (https://www.revscene.net/forums/)
-   Audio, Video, & Security Tech (https://www.revscene.net/forums/audio-video-security-tech_10/)
-   -   first time building a ported box, advice plese (https://www.revscene.net/forums/703951-first-time-building-ported-box-advice-plese.html)

Perfect_ESL 06-18-2015 05:12 PM
first time building a ported box, advice plese
 
hi, i have an alpine type-S 15" , but unfortunately the box is too big it wont fit into my honda civic sedan.
i am trying to build one myself.
i know that facing the sub backward sounds the best,,
but it is easier for me to build a box and let the sub face upward,
and which direction should the port face at?

if i make it face upward, will i lose some loudness?
which direction shall i make the port ?

and for the port can i use thinner mdf instead?

Jmac 06-18-2015 06:08 PM
What model is the sub? eg. SWS-1541d
What year is your Civic sedan?

The difference that direction (sub, port) makes in SPL will generally be inaudible, but rattles may be more prevalent. If you're competing, which seems unlikely with a Type S in a Civic sedan, the right direction may add a dB or two, but you'd really have to experiment to find the ideal setup.

You can use thinner MDF, but I wouldn't recommend it. If you're using MDF to build the port, it'll also act as a brace, so thicker MDF will have a greater bracing effect.

Perfect_ESL 06-18-2015 06:59 PM
Quote:
Originally Posted by Jmac (Post 8649806)
What model is the sub? eg. SWS-1541d
What year is your Civic sedan?

The difference that direction (sub, port) makes in SPL will generally be inaudible, but rattles may be more prevalent. If you're competing, which seems unlikely with a Type S in a Civic sedan, the right direction may add a dB or two, but you'd really have to experiment to find the ideal setup.

You can use thinner MDF, but I wouldn't recommend it. If you're using MDF to build the port, it'll also act as a brace, so thicker MDF will have a greater bracing effect.
its a 97 EL1.6 , sub is a sws -whatever dual 4 ohm.
what did you mean bu "rattles may be more prevalent?
i am going to buy some hush mat from amazon. to fully cover the trunk and front door and the roof.

SumAznGuy 06-18-2015 08:13 PM
Why does it have to be a ported box?
Since you are limited on space, why not build a sealed box with it facing towards to back but at a slight angle.
You won't need as much power to power the sub and you won't need as big of a box compared to a ported box.

Perfect_ESL 06-18-2015 08:55 PM
i think i can hear more lower bass, i dont care about the trunk space, just because the box i have right now wont fit into the opening of the trunk, i tried removing the fold down seat back and still wont fit thru the front.

is this stuff any good? Fat mat any good?
Amazon.com: FatMat 25 Sq Ft x 80 mil Thick Self-Adhesive RattleTrap Sound Deadener Bulk Pack w/Install Kit: Automotive

yeah where to buy peel and seal in vancouver?

Jmac 06-18-2015 10:01 PM
Quote:
Originally Posted by Perfect_ESL (Post 8649831)
its a 97 EL1.6 , sub is a sws -whatever dual 4 ohm.
what did you mean bu "rattles may be more prevalent?
i am going to buy some hush mat from amazon. to fully cover the trunk and front door and the roof.
Depending on the angle, the frequency at which the subwoofer is playing, and the enclosure design, you may experience various objects resonating (rattling). If the sub is, for example, particularly close to the rear deck, this can be exacerbated.

Sound damping material, when applied correctly, can definitely make things sound a lot better (inside and outside) by reducing energy transfer to those areas.
Quote:
Originally Posted by SumAznGuy (Post 8649868)
Why does it have to be a ported box?
Since you are limited on space, why not build a sealed box with it facing towards to back but at a slight angle.
You won't need as much power to power the sub and you won't need as big of a box compared to a ported box.
Bold isn't true. A ported enclosure is more efficient unless it's operating well-below tuning frequency (generally 1/4 octave below and lower), the enclosure is poorly-suited for the speaker, or the enclosure is poorly constructed/designed.

A ported enclosure will generally be larger, this is true.

I know the older model Type S subwoofers (10+ years old) were mid-high Q, thus better-suited (at least in theory) to sealed enclosures. I'm not sure about the newer versions. Would help to have a model number and/or T/S parameters.

whitev70r 06-18-2015 10:08 PM
Way too many variables for anyone to give meaningful advice.

Perfect_ESL 06-18-2015 10:42 PM
Quote:
Originally Posted by Jmac (Post 8649920)

I know the older model Type S subwoofers (10+ years old) were mid-high Q, thus better-suited (at least in theory) to sealed enclosures. I'm not sure about the newer versions. Would help to have a model number and/or T/S parameters.
Alpine SWS-15D4 PDF Owner's Manual Download & Preview - Page 2

i searched before its good for a ported.

installerz 06-19-2015 05:30 AM
Quote:
Originally Posted by Jmac (Post 8649920)
Depending on the angle, the frequency at which the subwoofer is playing, and the enclosure design, you may experience various objects resonating (rattling). If the sub is, for example, particularly close to the rear deck, this can be exacerbated.

Sound damping material, when applied correctly, can definitely make things sound a lot better (inside and outside) by reducing energy transfer to those areas.

Bold isn't true. A ported enclosure is more efficient unless it's operating well-below tuning frequency (generally 1/4 octave below and lower), the enclosure is poorly-suited for the speaker, or the enclosure is poorly constructed/designed.

A ported enclosure will generally be larger, this is true.

I know the older model Type S subwoofers (10+ years old) were mid-high Q, thus better-suited (at least in theory) to sealed enclosures. I'm not sure about the newer versions. Would help to have a model number and/or T/S parameters.
This is some good advise Jmac.

If you want more from a local source and some Hushmat, go to our Burnaby store. They know the car, the sub and the way to maximize the efficiency

gramser57 06-24-2015 09:36 PM
I've built a single 15" sub facing up and port facing passenger side with good results. I would do a single 6" aeroport by PSP to save space and have the ability to change your port tune.

orgasm_donor 07-09-2015 09:46 PM
I can design an enclosure for you with no problem as you have been a customer of mine for over 12 years! I can design a sweet ported enclosure for that sub that will fit in that trunk. I am a firm believer in ported for good, low bass extension and SPL. Slot port is easy to design and build and will net great results.

Quote:
Originally Posted by Perfect_ESL (Post 8649882)
i think i can hear more lower bass, i dont care about the trunk space, just because the box i have right now wont fit into the opening of the trunk, i tried removing the fold down seat back and still wont fit thru the front.

is this stuff any good? Fat mat any good?
Amazon.com: FatMat 25 Sq Ft x 80 mil Thick Self-Adhesive RattleTrap Sound Deadener Bulk Pack w/Install Kit: Automotive

yeah where to buy peel and seal in vancouver?


All times are GMT -8. The time now is 09:11 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
SEO by vBSEO ©2011, Crawlability, Inc.
Revscene.net cannot be held accountable for the actions of its members nor does the opinions of the members represent that of Revscene.net