NAIOA.comNAIOA.comNAIOA.com
 Create an Account
 

  
NAIOA Impala Forums :: View topic - How much difference does a correct enclosure make?
GarageGarage    1/4 Mile Table1/4 Mile Table    Forum FAQForum FAQ    SearchSearch    UsergroupsUsergroups   MedalsMedals
MemberlistMemberlist   ProfileProfile    Watched TopicsWatched Topics    Log in to check your private messagesLog in to check your private messages    Log inLog in 

How much difference does a correct enclosure make?
Goto page 1, 2, 3, 4, 5, 6  Next
 
Post new topic   Reply to topic    NAIOA Impala Forums Forum Index -> 2000-2005 Audio / Video Club
View previous topic :: View next topic  
Author Message
gg05impala
Member Level
Member Level


Joined: Jan 24, 2010
Posts: 1351
Posts per day: 0.47
Location: Cincinnati, Ohio

2005 Chevrolet Impala
1986 Nissan 300ZX


PostPosted: Mon Jan 30, 2012 10:23 am    Post subject:  How much difference does a correct enclosure make? Reply with quote

I was just wondering, if i fabricated my own box for 2 12 L5s (came in a box from kicker that i assume is too small), would there be much of a difference?

_________________
http://www.cardomain.com/ride/3350581
http://www.cardomain.com/ride/.....ssan-300zx

Audio: Kicker 1000.1zx, Kicker 12" L5 x2, Kicker 350.4, Pioneer TSD1602R x2, JVC xg-700, custom tuned box 33.8hz
Performance - lead foot in my 3.4L is all I have
Back to top
View user's profile Send private message
billy101
Member Level
Member Level


Joined: Sep 12, 2010
Posts: 1704
Posts per day: 0.65
Location: Willow Spring, NC

2001 Chevrolet Impala
2010 Chevrolet Malibu


PostPosted: Mon Jan 30, 2012 10:36 am    Post subject:   Reply with quote

IMO, the difference is night and day. I had my 1 12 on 400 watts in a prefab enclosure which didn't sound bad. Prefabs are tuned HIGH, so they'll be really loud in the upper frequencies but once I played a lower frequency like the notes in the song "Put On" the sub would bottom out from unloading (playing under box tuning). I built myself a box for the single 12 and it made SUCH the difference it was crazy.

_________________
2002 Impala LS 3.8 -121,749 miles 11/13/2011
2001 Impala LS 3.8 - 118,510 miles. 9/2/2011. RIP - 11/12/2011
2010 Malibu LTZ 3.6 - 16,014miles. 8/20/2011.
Back to top
View user's profile Send private message
davidhoutz
Uber
Uber


Joined: Feb 28, 2008
Posts: 978
Posts per day: 0.28
Location: Clemmons NC

2001 Chevrolet Impala


PostPosted: Mon Jan 30, 2012 11:18 am    Post subject:   Reply with quote

It will make a diff. Just depends if the extra cost of a custom made box is worth it to you.
Back to top
View user's profile Send private message
bbengineer
NAIOA Owner / Webmaster
NAIOA Administrator
NAIOA Administrator


Joined: Jun 01, 2005
Posts: 9496
Posts per day: 2.09
Location: NJ

2004 Chevrolet Impala
1998 Chevrolet Corvette
2007 Chevrolet Tahoe
2008 Subaru Impreza
1970 Chevrolet Chevelle


PostPosted: Mon Jan 30, 2012 12:04 pm    Post subject:   Reply with quote

It makes ALL of the difference.... an incorrectly sized (or shaped, or tuned) box will make the best drivers sound like complete trash

BBEngineer

_________________

Decisions...Decisions...
Back to top
View user's profile Send private message Visit poster's website
IffyG
NAIOA Moderator
NAIOA Moderator
Silver Contributor (Amount: 1) Silver Contributor


Joined: May 19, 2007
Posts: 13731
Posts per day: 3.58
Location: Nashville, TN

2002 Chevrolet Monte Carlo
1998 Oldsmobile Intrigue
2009 Chevrolet Malibu


PostPosted: Mon Jan 30, 2012 12:09 pm    Post subject:   Reply with quote

Find out how far from the desired specs your box is. If it's close, I don't think it would be worth the time to make your own, but if it's way out of spec it'll be well worth the trouble of making a new one.

_________________
helldorado wrote:
GLWTGFY. Big Thumbs Up

Dan wrote:
Protip: If you don't know what you're doing, don't do it.


d
Back to top
View user's profile Send private message
Pitch Black SS
NAIOA Owner / Founder
NAIOA Administrator
NAIOA Administrator


Joined: Mar 08, 2004
Posts: 12756
Posts per day: 2.55
Location: Tullahoma, TN

2004 Chevrolet Impala
1982 Chevrolet Malibu
2007 Chrysler 300C
1986 Chevrolet Monte Carlo


PostPosted: Mon Jan 30, 2012 12:10 pm    Post subject:   Reply with quote

dont assume the box is too small, some of today's subs can work (and designed to do so) with a very small enclosure.

You need to read up on the specs of your specific sub to see exactly what you need. Also, the shape and style of box makes a difference. A sub that woks well in a bandpass box may not like a sealed box. Same for ported, isobaric and all other types of enclosures out there

BTW, there are also ways to increase the enclosures volumes without making it bigger.

_________________
Back to top
View user's profile Send private message Visit poster's website AIM Address
davidhoutz
Uber
Uber


Joined: Feb 28, 2008
Posts: 978
Posts per day: 0.28
Location: Clemmons NC

2001 Chevrolet Impala


PostPosted: Mon Jan 30, 2012 2:07 pm    Post subject:   Reply with quote

To add to that I believe the old rule of thumb was +or- 7-10% for box size. And don't forget to use the internal box demensions. And if the box is way out of whack, you could also hurt the subs and amp. I'd start with some poly fill before building another box and see if that helps.
Back to top
View user's profile Send private message
gg05impala
Member Level
Member Level


Joined: Jan 24, 2010
Posts: 1351
Posts per day: 0.47
Location: Cincinnati, Ohio

2005 Chevrolet Impala
1986 Nissan 300ZX


PostPosted: Mon Jan 30, 2012 6:51 pm    Post subject:   Reply with quote

i just did some calculations and determined that the cubic ft of my kicker enclosure is 5.49 cubic ft. I think i did the calculations correctly...

This kicker box is a trapezoid, not a rectangular enclosure.

Measurements in cm:
Top Surface Depth 41.5
Bottom Surface Depth 49.7
Height 40.6
Width 82.2

Should equal 5.49 cubic feet right? I can find much on L5 from Kickers website because they are no longer on the site for some reason. I think i read once that an L5 ported requires 2.5 cu ft per speaker. So the box (if my calculations are correct) is the correct size and i would not need to fab a new box, or am i missing something

_________________
http://www.cardomain.com/ride/3350581
http://www.cardomain.com/ride/.....ssan-300zx

Audio: Kicker 1000.1zx, Kicker 12" L5 x2, Kicker 350.4, Pioneer TSD1602R x2, JVC xg-700, custom tuned box 33.8hz
Performance - lead foot in my 3.4L is all I have
Back to top
View user's profile Send private message
IffyG
NAIOA Moderator
NAIOA Moderator
Silver Contributor (Amount: 1) Silver Contributor


Joined: May 19, 2007
Posts: 13731
Posts per day: 3.58
Location: Nashville, TN

2002 Chevrolet Monte Carlo
1998 Oldsmobile Intrigue
2009 Chevrolet Malibu


PostPosted: Mon Jan 30, 2012 7:19 pm    Post subject:   Reply with quote

Measurements in centimeters? What are you? Canadian? Laughing

That being said my quick calculations are around 5.4 ish cubic feet. I'd say you probably have an appropriate sized box and don't need to worry about it.

_________________
helldorado wrote:
GLWTGFY. Big Thumbs Up

Dan wrote:
Protip: If you don't know what you're doing, don't do it.


d
Back to top
View user's profile Send private message
gg05impala
Member Level
Member Level


Joined: Jan 24, 2010
Posts: 1351
Posts per day: 0.47
Location: Cincinnati, Ohio

2005 Chevrolet Impala
1986 Nissan 300ZX


PostPosted: Mon Jan 30, 2012 7:21 pm    Post subject:   Reply with quote

Lol no, I'm not a Canadian. The manual that came with the subs had measurements in cm.

_________________
http://www.cardomain.com/ride/3350581
http://www.cardomain.com/ride/.....ssan-300zx

Audio: Kicker 1000.1zx, Kicker 12" L5 x2, Kicker 350.4, Pioneer TSD1602R x2, JVC xg-700, custom tuned box 33.8hz
Performance - lead foot in my 3.4L is all I have
Back to top
View user's profile Send private message
IffyG
NAIOA Moderator
NAIOA Moderator
Silver Contributor (Amount: 1) Silver Contributor


Joined: May 19, 2007
Posts: 13731
Posts per day: 3.58
Location: Nashville, TN

2002 Chevrolet Monte Carlo
1998 Oldsmobile Intrigue
2009 Chevrolet Malibu


PostPosted: Mon Jan 30, 2012 7:25 pm    Post subject:   Reply with quote

I'm not gonna lie, I did it assuming the numbers were inches (not even realizing how big an 82" wide box would be) and ended up with 88 cubic feet. Made a quick WTF face and realized I was just an idiot. Laughing

_________________
helldorado wrote:
GLWTGFY. Big Thumbs Up

Dan wrote:
Protip: If you don't know what you're doing, don't do it.


d
Back to top
View user's profile Send private message
gg05impala
Member Level
Member Level


Joined: Jan 24, 2010
Posts: 1351
Posts per day: 0.47
Location: Cincinnati, Ohio

2005 Chevrolet Impala
1986 Nissan 300ZX


PostPosted: Mon Jan 30, 2012 9:12 pm    Post subject:   Reply with quote

iffy your not alone. It took me like almost an hour after coming up with ridiculous numbers before my ass looked at the numbers again in the manual and realized it was in cm. I threw my pen so hard at the wall and stormed out of the room LOL

_________________
http://www.cardomain.com/ride/3350581
http://www.cardomain.com/ride/.....ssan-300zx

Audio: Kicker 1000.1zx, Kicker 12" L5 x2, Kicker 350.4, Pioneer TSD1602R x2, JVC xg-700, custom tuned box 33.8hz
Performance - lead foot in my 3.4L is all I have
Back to top
View user's profile Send private message
rc10mike
Dedicated
Dedicated


Joined: Jan 17, 2007
Posts: 434
Posts per day: 0.11
Location: Jacksonville FL

2004 Chevrolet Impala


PostPosted: Tue Jan 31, 2012 8:49 pm    Post subject:   Reply with quote

Well lets see here:

With your given dimensions and assuming they used .75 wood the exact internal volume is 4.26ft3. Now we have to account for sub displacement, which in this case is .075 ft3 for a single L5 12., so .15 ft3 for both.

We are now left with 4.11, but the box is ported and we have to subtract port displacement too. There no real way to know how much the port actually takes up, but port displacement is much larger than sub displacement. Lets just say .75. This leaves us with 3.36 of space for both subs, or 1.68 for each.

Kicker recommends 3.25 PER SUB for the "SPL/Deep Bass" enclosure.

So yes build a bigger, lower tuned enclosure:)

_________________
2004 Impala SS:
K&N Intake Kit, ZZP Ceramic Powerlog, ZZP PCM, Hogan DP4 Modular DP, Poly Upper Mounts
Pioneer DEX-P99RS HU, Soundstream HRU.2, Soundstream HRU.4, Image Dynamics IDQ12 x2, Hybrid Audio L6SE & Hybrid Audio L1 Pro R2, 200A Alt
Back to top
View user's profile Send private message
gg05impala
Member Level
Member Level


Joined: Jan 24, 2010
Posts: 1351
Posts per day: 0.47
Location: Cincinnati, Ohio

2005 Chevrolet Impala
1986 Nissan 300ZX


PostPosted: Tue Jan 31, 2012 9:33 pm    Post subject:   Reply with quote

I didnt even think about taking the displacements into consideration. I am off to build a new box soon! For 3.25ft3 a sub, would that even fit into the impala trunk? I can use the whole trunk, lets just hope i wont need the spare Very Happy Throwing out dimensions of a box would be nice Cool

_________________
http://www.cardomain.com/ride/3350581
http://www.cardomain.com/ride/.....ssan-300zx

Audio: Kicker 1000.1zx, Kicker 12" L5 x2, Kicker 350.4, Pioneer TSD1602R x2, JVC xg-700, custom tuned box 33.8hz
Performance - lead foot in my 3.4L is all I have
Back to top
View user's profile Send private message
rc10mike
Dedicated
Dedicated


Joined: Jan 17, 2007
Posts: 434
Posts per day: 0.11
Location: Jacksonville FL

2004 Chevrolet Impala


PostPosted: Tue Jan 31, 2012 9:52 pm    Post subject:   Reply with quote

The range Kicker lists for ported is "Compact" 1.75, "Street Bass" 2.5, and "Deep Bass/SPL" of 3.25.

You will likely get great results from 2.5 per sub. But dont forget to factor in displacements. The box will probably be closer to 6ft3 external.

This is doable in an Impala trunk, you just need to build a box to max height and max width, letting the depth be the variable.

If I remember correctly max height is 16 and width 34, but double check...

_________________
2004 Impala SS:
K&N Intake Kit, ZZP Ceramic Powerlog, ZZP PCM, Hogan DP4 Modular DP, Poly Upper Mounts
Pioneer DEX-P99RS HU, Soundstream HRU.2, Soundstream HRU.4, Image Dynamics IDQ12 x2, Hybrid Audio L6SE & Hybrid Audio L1 Pro R2, 200A Alt
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    NAIOA Impala Forums Forum Index -> 2000-2005 Audio / Video Club All times are GMT - 4 Hours
Goto page 1, 2, 3, 4, 5, 6  Next
Page 1 of 6

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Powered by phpBB © 2001, 2005 phpBB Group
Forums ©
All logos and trademarks in this site are property of their respective owner. Comments and posts are property of the poster. All other content is © 2008 by the NAIOA.


Use of this site constitutes agreement with the NAIOA Terms of Service (TOS)


PHP-Nuke Copyright © 2005 by Francisco Burzi. This is free software, and you may redistribute it under the GPL. PHP-Nuke comes with absolutely no warranty, for details, see the license.
Server Local Time: November 19, 2017, 8:03:13 am
Page Generation: 0.12 Seconds ( SQL 45:147 in 0.01 Seconds )