Sub position flush to a surface?
06-04-2004, 11:38 AM
#1
0 Watt CAFz'r
Thread Starter
Join Date: May 2004
Posts: 3
Is it not a disadvantage to face your subs (dust cap) directly flush against a flat surface ie:the rear seat from within the trunk (sedan/coupe)? I figured it was a bad idea for both ported and sealed. I can especially see why with a ported (assuming your ports are going in the same direction as the subs and will require correct airflow clearance). Is it not such a good idea for sealed as well??? Am I correct in thinking this?
Why have I seen a number of SQ cars set things up in this manner?
Why have I seen a number of SQ cars set things up in this manner?
06-04-2004, 11:56 AM
#2
50 Watt CAFz'r
Join Date: Jan 2004
Posts: 206
a few disadvantages:
1: Anything infront of a driver can effect its dispersion pattern. in a sub its not a dramatic due to the wavelength of the frequencies the sub produces.
2: In a sedan you will find a large decrease in output when installed behind a seat (subs in the trunk)Also this mounting tends to cause rattles in "ecomony cars" due to less vibration obsortion being used.
3: In a standard cab truck having subs behind your seat will 100% give you bass from the back. Mostly because you can feel the output VIA your seat (physical clues of speaker placment)shaking
For the average user it's not a big deal. But for SQ competition cars like you mentioned it is a BIG deal. As an IASCA judge I have heard the differance from the same model of car with different speaker/install set ups.
Infact I believe it has such an impact on the total accuracy of a sub that in My Impala (4 door sedan) and Marc Turners neon (two door) we removed the rear deck completly in both cars to
have the subs play un-restricted into the passenger compartment. Testing in Marc's Neon showed a dramatic increase in output, and frequency response. (you now can hear, and feel the low 30-20hz notes) This was done before we moved to SQ subs upfront, but it did make the car alot better in the lower sub bass after we cut the decks
Also we have done two trucks (Rina Beckham's Dodge Ram , and Todd Gaskells Dodge Dakota) and mounted subs between the front seats, and had the enclosures output infront of the seats.
hope that helps
1: Anything infront of a driver can effect its dispersion pattern. in a sub its not a dramatic due to the wavelength of the frequencies the sub produces.
2: In a sedan you will find a large decrease in output when installed behind a seat (subs in the trunk)Also this mounting tends to cause rattles in "ecomony cars" due to less vibration obsortion being used.
3: In a standard cab truck having subs behind your seat will 100% give you bass from the back. Mostly because you can feel the output VIA your seat (physical clues of speaker placment)shaking
For the average user it's not a big deal. But for SQ competition cars like you mentioned it is a BIG deal. As an IASCA judge I have heard the differance from the same model of car with different speaker/install set ups.
Infact I believe it has such an impact on the total accuracy of a sub that in My Impala (4 door sedan) and Marc Turners neon (two door) we removed the rear deck completly in both cars to
have the subs play un-restricted into the passenger compartment. Testing in Marc's Neon showed a dramatic increase in output, and frequency response. (you now can hear, and feel the low 30-20hz notes) This was done before we moved to SQ subs upfront, but it did make the car alot better in the lower sub bass after we cut the decks
Also we have done two trucks (Rina Beckham's Dodge Ram , and Todd Gaskells Dodge Dakota) and mounted subs between the front seats, and had the enclosures output infront of the seats.
hope that helps
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