Well guys, i went all out. I want this to sound the best it can, so i ripped out the backseat of my Sunbird. Its just my college car anyways, haha. Thankfully it made it sound much louder and deeper. Good old airspace helps everything it seems.
Now what i would like to know is if a ported box would sound better than the 2.5 cubic foot enclosed box i have right now. My sub came with a layout for the box, so is it worth my time to make it? If so, any tips on how to make the box would be appreciated. (screws, seals, caulk, etc.)
Also, you guys have talked to me about parallel wiring my sub which is dual 4 ohm voice coils. Does it make a difference whether I run one set of wires to my amp and then just run a short wire from pos voice coil to pos and negative coil to negative coil, as opposed to running 2 sets of wires out of my amp and having one voice coil per input on my mono amp? Basically I dont understand if i get all the power out of my mono amp by just using one pos and one neg input, or if i should use both sets. I guess the "bridgeable" mono amp title it had threw me off. Best Buy pisses me off sometimes.
Thanks a ton guys ... I just want to get things BUMPING !
Replies (3)
Relax_The_Mind on 07/3/2003 05:21:11
Rob,
As for you wiring question no... It doesnt matter if you run your wires to your amp. Actually it is ideal to run wire from coil to coil when running parallel as to cut down on the amount of speaker wires coming out of your box not to mention the resistance that a lot of cheap speaker wires tend be. If I am correct on your particular amp I think you hook them up to the middle inputs (I may need a second guess on that).
The box question: First of all before anything, do you have enough space for a ported box? your looking at around 4cu^f of box space not counting all the curves and bends of your car and the free airspace for the port.
After that it can also depend on what type of music you listen to. Sealed boxes play tighter smooth bass, whereas ported boxes play punchier bass.
Ported boxes can play louder than a sealed box but can be a bit more tricky to build. You can "tune" them by using different port sizes for them to play optimally at certain frequency ranges. Speakers in a ported box dont require as much power as a sealed box to acheive full excursion...meaning you get more out of your amp.
Some tools I use: Drywall screws are the best, countersinking drill bit, drafting ruler (measuring tape is by no means ACCURATE), pencil, I use either good old wood glue or liquid nails (yes I have made a box without using any screws and it never leaks), router table saw...etc
RTM
Swez on 07/3/2003 08:30:31
Agreed... Sealed boxes are smaller and tend to be more tight and accurate with most bass frequencies, but have a natural tendency to roll off the deep low bass below ~40 Hz.
Ported boxes, when made to woofer specs tend to require less power to reach X-Max (full excursion limits) and a subsonic filter is generally a good thing to have in your system. Ported boxes are more efficient and give more SPL near the tuning frequency, but as RTM said, you have to take careful measurement of the space you have available for the sub enclosure. Very close to 4.0 ft^3
enclosure (external) to get a 2.5 ft^3 internal air space.
Have some ideas on box building as RTM gave some of the basics. Am sure that between the 2 of us, we can get you there... once you have carefully measured your trunk space.
Gotta run for work now,
Swez
only_tuning on 11/19/2003 12:01:34
ok
but how we can count or know the best air space for a sub in the car
???????
Now what i would like to know is if a ported box would sound better than the 2.5 cubic foot enclosed box i have right now. My sub came with a layout for the box, so is it worth my time to make it? If so, any tips on how to make the box would be appreciated. (screws, seals, caulk, etc.)
Also, you guys have talked to me about parallel wiring my sub which is dual 4 ohm voice coils. Does it make a difference whether I run one set of wires to my amp and then just run a short wire from pos voice coil to pos and negative coil to negative coil, as opposed to running 2 sets of wires out of my amp and having one voice coil per input on my mono amp? Basically I dont understand if i get all the power out of my mono amp by just using one pos and one neg input, or if i should use both sets. I guess the "bridgeable" mono amp title it had threw me off. Best Buy pisses me off sometimes.
Thanks a ton guys ... I just want to get things BUMPING !
Replies (3)
Relax_The_Mind on 07/3/2003 05:21:11
Rob,
As for you wiring question no... It doesnt matter if you run your wires to your amp. Actually it is ideal to run wire from coil to coil when running parallel as to cut down on the amount of speaker wires coming out of your box not to mention the resistance that a lot of cheap speaker wires tend be. If I am correct on your particular amp I think you hook them up to the middle inputs (I may need a second guess on that).
The box question: First of all before anything, do you have enough space for a ported box? your looking at around 4cu^f of box space not counting all the curves and bends of your car and the free airspace for the port.
After that it can also depend on what type of music you listen to. Sealed boxes play tighter smooth bass, whereas ported boxes play punchier bass.
Ported boxes can play louder than a sealed box but can be a bit more tricky to build. You can "tune" them by using different port sizes for them to play optimally at certain frequency ranges. Speakers in a ported box dont require as much power as a sealed box to acheive full excursion...meaning you get more out of your amp.
Some tools I use: Drywall screws are the best, countersinking drill bit, drafting ruler (measuring tape is by no means ACCURATE), pencil, I use either good old wood glue or liquid nails (yes I have made a box without using any screws and it never leaks), router table saw...etc
RTM
Swez on 07/3/2003 08:30:31
Agreed... Sealed boxes are smaller and tend to be more tight and accurate with most bass frequencies, but have a natural tendency to roll off the deep low bass below ~40 Hz.
Ported boxes, when made to woofer specs tend to require less power to reach X-Max (full excursion limits) and a subsonic filter is generally a good thing to have in your system. Ported boxes are more efficient and give more SPL near the tuning frequency, but as RTM said, you have to take careful measurement of the space you have available for the sub enclosure. Very close to 4.0 ft^3
enclosure (external) to get a 2.5 ft^3 internal air space.
Have some ideas on box building as RTM gave some of the basics. Am sure that between the 2 of us, we can get you there... once you have carefully measured your trunk space.
Gotta run for work now,
Swez
only_tuning on 11/19/2003 12:01:34
ok
but how we can count or know the best air space for a sub in the car
???????
Copyright ClubKnowledge 2009 * All Rights Reserved
