Welcome to the North American Subaru Impreza Owners Club Friday November 28, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC General > Car Audio, Video & Security

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 06-14-2001, 02:56 AM   #1
iokita
Scooby Newbie
 
Member#: 6705
Join Date: May 2001
Location: honolulu, hawaii, USA
Question different subwoofer boxes

I was just wondering what the differences were in bandpass boxes and normal sealed ones.
* Registered users of the site do not see these ads.
iokita is offline   Reply With Quote
Old 06-14-2001, 06:57 AM   #2
Nat
Scooby Specialist
 
Member#: 759
Join Date: Jan 2000
Chapter/Region: NESIC
Location: Warwick, RI
Vehicle:
2004 WRX
2000 SV650

Post

As it sounds, a sealed box is simply a box with the speaker attached to it. You have to make sure that all joints are sealed well with silicone or something, and these boxes are better for tight bass. I have one in my 99 and like it, but listen more to rap and hip hop which tends to favor a bandpass or ported design. Both of these play bass that it looser, not tight drum like bass of a sealed box. The bandpass box places one side of the speaker into a sealed box, and the other side into a ported box. The design of this box only allows a certain band of frequencies out, thus it's name of bandpass. It is more efficient meaning that you will get louder bass from less power.
Nat is offline   Reply With Quote
Old 06-14-2001, 08:05 AM   #3
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

Post

If you're interested in looking at box designs, go to www.jlaudio.com and check out the tutorials, lots of good generic box info there.

In short:
A bandpass box is a box with two chambers. The speaker placed between the two chambers.

Types of bandpass boxes are determined by the type of chamber on each side, like sealed/ported, sealed/horn loaded, ported/ported, etc...

Bandpass boxes have inherently more efficiency (higher SPL for a given power input,) but since the box is reinforcing frequencies it usually sounds boomy.
Concillian is offline   Reply With Quote
Old 06-14-2001, 07:29 PM   #4
supersubee
Scooby Specialist
 
Member#: 351
Join Date: Oct 1999
Location: NE
Vehicle:
97 Legacy GT
White

Post

not to start a flame war here, but why does everyone think that ported boxes are not accurate, nor are they punchy at all. With the latest design i have been using i have none of these problems, and truthfully cant even stand the sound of a sealed box anymore. Anyone else have any input on this subject.

kevin www.geocities.com/subee_sound
supersubee is offline   Reply With Quote
Old 06-14-2001, 07:39 PM   #5
imprezadan
Scooby Specialist
 
Member#: 6935
Join Date: May 2001
Vehicle:
1999 Impreza 2.5RS
Rally Blue

Post

Bandpass boxes are just loud. If you listen to rap get one. If you listen to other music get a sealed box.
imprezadan is offline   Reply With Quote
Old 06-15-2001, 07:01 AM   #6
Nat
Scooby Specialist
 
Member#: 759
Join Date: Jan 2000
Chapter/Region: NESIC
Location: Warwick, RI
Vehicle:
2004 WRX
2000 SV650

Post

Whoops.....yeah, I know. It's just that I keep reading all this stuff about sealed boxes being the "tightest" sounding bass that I guess it's just in the brain. I like my sealed box, but can't wait to get some cash and move to a ported one. From what I have listened to (very limited though) I thought that ported boxes tended to be a little smoother than sealed ones. Not to mean that they couldn't kick hard, but it sounded smoother overall which is really what I want. Maybe it's hard to put into words.....or maybe my ears are just screwed up---wouldn't surprise me
Nat is offline   Reply With Quote
Old 06-15-2001, 07:40 AM   #7
supersubee
Scooby Specialist
 
Member#: 351
Join Date: Oct 1999
Location: NE
Vehicle:
97 Legacy GT
White

Post

The ported boxes i have been building have tons of output, are super tight, and punch like mike tyson. I love ported boxes. On the flip side, I think that bandpass is not a good enclosure since in my honest opinion they sound like crap, and are very hard on woofers. The bandpass box muffles distortion and you can actually be killing the woofer and have it sound the same as if you werent. If you want lots of output for rap music, go with a ported box, and just leave the bandpass stuff alone.

kevin www.geocities.com/subee_sound
supersubee is offline   Reply With Quote
Old 06-15-2001, 07:44 AM   #8
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

Post

People talk like that because Almost all factory designed ported boxes are that way. A properly designed ported box does sound very nice.

However, cars are not ideal for ported boxes because the transfer function of most vehicles more closely resembles a 2nd order function (+12dB per octave) which matches well with a sealed box.

Thus, even properly designed ported boxes will generally not have flat in car response. Also, the lack of the acoustic suspension for a sealed box requires a less compliant woofer for proper design. The wrong woofer in a ported enclosure will have slow response no matter what.

Properly designed ported boxes generally require large volumes, which manufacturers don't want to use because Joe off the street wants big bass in small volumes, so they make the enclosures on the small side for what is acceptable. And they don't want to have to bend the port around on the inside so they tune to a higher frequency, further adding to the peak and boomy response that ported boxes are known for. However, if you make one yourself and tune it properly, a ported box can be very nice...I myself use ported 6.5 in a 2 way speaker for my stereo pair at home. The bass is strong, and not at all boomy. But I had to give them 1.3 ft3 of volume for proper tuning.

And bandpass boxes are virtually impossible to not make boomy. From what I've heard, horn loaded boxes can sound very good and give a nice gain in SPL, though I've never built or heard a properly designed horn loaded box.

[edit] also, as far as 'tight' usually people refer to 'tight' in terms of the quickness of the response, which IS usually better in a sealed enclosure. Unless you have a very low compliance woofer, usually with a Qts of less than 0.25 or so a ported enclosure is not even going to come close to the same transient capability of a sealed box. Punch, yes, that's something ported boxes are excellent at. If I were to describe a sealed box in one word it would probably be 'smooth'.

[ June 15, 2001: Message edited by: Concillian ]
Concillian is offline   Reply With Quote
Old 06-15-2001, 08:29 AM   #9
jay25RS
Scooby Specialist
 
Member#: 4273
Join Date: Feb 2001
Chapter/Region: NESIC
Location: CT
Vehicle:
2011 GR-STI
& 2015 Legacy Ltd.

Post

I listen to rap music and have a sealed box. I love it, it is so quick to respond and tight. I am using a 1 cubic foot box and a 12" Pioneer Pro VCCS IMPP sub. Ported boxes IMHO sound like *****. I always end up hearing muffling or distortion even in auto competitions for Sound Quality. It's just not as natural sounding as a sealed box. Band pass, hmph, don't get me started, all that it is good for is to vibrate and ruin speakers.
jay25RS is online now   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTT: My 12" Subwoofer Box for a single 10" Woofer Box Inprogress TXIC Private Classifieds 1 01-22-2008 03:42 AM
Legacy Wagon Subwoofer/box FS sybir Legacy Forum 9 04-17-2002 04:13 PM
Custom Plexiglass Subwoofer Boxes Anyone??? GOLDBERG Hawaii Impreza Club Forum -- HIIC 5 04-11-2002 08:22 AM
Any interest in a 2002 WRX / RS only subwoofer box? BrysImpreza Car Audio, Video & Security 26 03-22-2002 03:06 PM


All times are GMT -4. The time now is 06:22 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.