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Sub enclosure/placement


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hotdoggin 
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Posted: September 23, 2005 at 9:23 AM / IP Logged  
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???
jstruckman 
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Posted: September 23, 2005 at 9:56 AM / IP Logged  
which way is the sub facing in the trunk?
Jazzy
hotdoggin 
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Posted: September 23, 2005 at 10:00 AM / IP Logged  
Sub is pointed face up, about 4" away from the deck lid with 12" x 12" opening I cut in it.
jstruckman 
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Posted: September 23, 2005 at 10:32 AM / IP Logged  
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
hotdoggin 
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Posted: September 23, 2005 at 10:42 AM / IP Logged  
Gracias amigo. I will try that later today and let you know.
Poormanq45 
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Posted: September 23, 2005 at 11:14 AM / IP Logged  
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
sneakycyber 
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Posted: September 23, 2005 at 11:20 AM / IP Logged  
WOW I learned alot from that article, thanks for the post poormanq. ^5 Sub enclosure/placement -- posted image.
Ocuriel 
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Posted: September 23, 2005 at 5:27 PM / IP Logged  
I usually get the best bass response by facing the subs towards the rear trunk like jstruck mentioned.     
1883atlantics 
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Posted: September 23, 2005 at 5:45 PM / IP Logged  

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

hotdoggin 
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Posted: September 23, 2005 at 9:20 PM / IP Logged  
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.
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