Sub enclosure/placement
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=63135
Printed Date: May 08, 2024 at 4:06 PM
Topic: Sub enclosure/placement
Posted By: hotdoggin
Subject: Sub enclosure/placement
Date Posted: September 23, 2005 at 9:23 AM
I have a 96' Impala SS. I made an 20" square enclosure for my 4 ohm Cerwin Vega 124 (12" single voice coil). I cut a 12 x 12 opening in my deck lid to get better response.
The problem: Sub sounds super sweet with trunk lid open or even cracked open. Sub sounds performance is horrible when the trunk is closed!
Any ideas???
Replies:
Posted By: jstruckman
Date Posted: September 23, 2005 at 9:56 AM
which way is the sub facing in the trunk?
Jazzy
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Posted By: hotdoggin
Date Posted: September 23, 2005 at 10:00 AM
Sub is pointed face up, about 4" away from the deck lid with 12" x 12" opening I cut in it.
Posted By: jstruckman
Date Posted: September 23, 2005 at 10:32 AM
I would position the sub facing the rear of the trunk. This will allow time for the low frequency sound waves to develop and give you louder deeper bass tones. Position the box in several spots in the trunk to see what will give you the best sound.
Jazzy
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Posted By: hotdoggin
Date Posted: September 23, 2005 at 10:42 AM
Gracias amigo. I will try that later today and let you know.
Posted By: Poormanq45
Date Posted: September 23, 2005 at 11:14 AM
jstruckman wrote:
I would position the sub facing the rear of the trunk. This will allow time for the low frequency sound waves to develop and give you louder deeper bass tones.
MYTH! Low frequency waves do NOT need distance to develope properly.
What you are experiencing by opening the trunk is a reduction in phase cancellation. Your enclosure is aimed improperly. I recommend tha tyou read this:
Properly aiming your subwoofer-------------
Posted By: sneakycyber
Date Posted: September 23, 2005 at 11:20 AM
WOW I learned alot from that article, thanks for the post poormanq. ^5  -------------
Posted By: OCURIEL
Date Posted: September 23, 2005 at 5:27 PM
I usually get the best bass response by facing the subs towards the rear trunk like jstruck mentioned.
Posted By: 1883atlantics
Date Posted: September 23, 2005 at 5:45 PM
Poormanq45 wrote:
jstruckman wrote:
I would position the sub facing the rear of the trunk. This will allow time for the low frequency sound waves to develop and give you louder deeper bass tones.
MYTH! Low frequency waves do NOT need distance to develope properly.
What you are experiencing by opening the trunk is a reduction in phase cancellation. Your enclosure is aimed improperly. I recommend tha tyou read this:
Properly aiming your subwoofer
That's a very interesting article. Do you happen to know if facing the sub down to the floor in a large vehicle (such as a van) hurt the performance at all? Eddie's article didn't make that clear (or I missed it...). Thanks Jeff
Posted By: hotdoggin
Date Posted: September 23, 2005 at 9:20 PM
Fellas, I moved the enclosure back towards the tail lights, which was about 20" from where it was. Impala has a huge trunk. It is still facing upwards toward the trunk lid and now it sounds SWEET! Thanks Jazzy.
Posted By: Master Asylum
Date Posted: September 23, 2005 at 10:06 PM
If it is still facing the lid you are minimizing the reinforcement value.... I believe I've heard it compared to water/dispersion, which if you look at it like that makes a very good point. But meh. If it sounds good enough to ya, ok.
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1998 Monte Carlo w/
Eclipse CD8454
2xRockford 5.25" Power 2-way T152C
2xRockford 6"x9" Punch 3-way FRC4369
1xMemphis 16-MCH1300 5-channel
2xKicker 12" L5 Solobaric-2 Ohm
Posted By: wranglercory
Date Posted: September 24, 2005 at 6:21 PM
face sub to the rear so that the sound doesnt reflect off of the rear deck .
Posted By: hotdoggin
Date Posted: September 24, 2005 at 8:21 PM
Will try it later this week and let ya know. thanks
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