Well I finally got my new (to me) 1992 Honda Accord, and I got the dash all taken apart and the console as well. I removed the old stereo an installed my Cd/Mp3 player. It looks sweet for doing it with a Wal-Mart kit. Since i had the center console apart i went ahead and ran the wires under it as well. I ran some 4 gauge through a convenient little plastic pushout up by the passenger floorboard. I got the wires ran very nicely, my best job in 4 cars. Now its box building time, the subs and amps are supposed to come in tommorow. So on to my question .....
What is the best way to mount subs. by that i mean direction... facing the back of the trunk, facing up at the ceiling of the trunk, or facing the backseat. It seems like the easiest fit for this small trunk would be having them face upwards towards the ceiliing. I could make the box about 15 inches tall ... 32 inches wide, and 32 inches long ... i dont know how that would do for sound though. The face where the subs would be mounted would be 32"x15" .... but they would only have 14 inches underneath them, without counting the magnet space .. How do you think that will sound .. would it be better to make a small box and have them face the back of the trunk .. it would have to be alot smaller of a box .. prolly like 32 wide, 16 tall, and 18 long ... thanks guys
Replies (12)
P0werLifter on 09/3/2004 02:18:51
Glad to hear your got the CD player intalled and looking nice. Congrats GRIN
As far as the best way to mount the subwoofers, i havnt had much experience in dealing with subenclosures in trunks due tot he fact that most of my installs have been in trucks. In a truck, for SPL i reccomend facing the subwoofers up, but in your case, from what ive heard people say, either A. Face them towards the back of the trunk for the best SPL, or B. face the subs towards the rear seats for SQ. Again, i havnt had much experience with trunk sub placement but would be worth a shot.
BTW, are you using a sealed or Ported enclosure? If you go ported you will have more SPL output and more low end bass than Sealed if thats what your going for.
Im sure one of the others will be along shortly.
-Jason
uochronos on 09/3/2004 02:29:12
as to which way to face subs this is hit in miss. usualy they sound best facing which ever way gives them the most air room in front of them... however experimenting with differnt directions can help. my car i had them back up agaibnst the seat and facing the back of the trunk. in my buddies car they sound better facing toward the seat and backed up against the trunk area...
so really trying it is the only way to know which well sound best to you/
Black_Rob on 09/3/2004 02:38:04
I Will be making a Sealed enclosure ... i wanted ported but after actually getting the car and seeing the trunk, it just wouldnt be possible to get the cubic feet to make a dual 15 ported box ..... The website calls for 1.5-3.0 cubic feet of airspace. I can definately make it 32" acrossed ... its the height and depth that is hard. its either gotta be tall and slim or short and long ... i could probably pull of 32long 15high and 20 deep .. not sure what that comes to in CF ...... let me know what you guys think .... Swez, what do you think about the first question up top
uochronos on 09/3/2004 02:44:43
the dimensions you listed get about 5.5 cubic feet outside. well be slightly less internal volume. thats a good chunk of space to work with.
piece of advice make sure it well fite into the trunk. have seen people measure for hours build a box and it wont fit threw the trunk opening its very frustrating.
P0werLifter on 09/3/2004 02:46:39
32x15x20=9600 9600/1728= 5.55 cubic feet for the dimensions you stated. 15" is the maximum height you can go? My reccomendation would be to build the enclosure so the drivers point towards the rear of the trunk. Might be a bit tricky mounting the subs with such small parameters in the height department since your going to virtually have the enclosure the same height as the subwoofers (15"s tall)
-Jason
uochronos on 09/3/2004 03:11:04
mount subs at an angle:) if you can only make a 15" tall box then simply clant the end facing towards the back and you can get a 17" or so long pannel with only tilting it a little bit.
ttocs on 09/3/2004 12:11:18
always make sure that it will fit through the opening.. That is always a sad bit of humor to see an installer standing next to the car scratching his head, as the box is pearched above the opening...
ttocs on 09/3/2004 12:12:19
and glad to hear the deck went in well. Each install gets a little easier normally.
swez on 09/3/2004 13:00:08
Have to realize that if the sub OD is ~15" in diameter, means the sub mounting panels needs to be at least 16.5" tall if you mount the enclosure as a back firing design. (one that fires back toward the bumper) In most cases, this will be the best install option sound wise.
So, what we need to know is the max height the box can be and still allow for the subs to mount properly. Wedge designs can help if your overall usable height is >14.5" but less than 16.5".
With that height max number established, then we can manipulate width and depth dimensions of the box to get the targeted cf airspace recommended for the subs.
Do you see room for moree than 32" of Width across the trunk/hatch? If yes, we can do some additioional manipulations in Depth to make it work.
Is this a hatchback or trunk only design? Do the rear seats flip down as well?
Swez
Black_Rob on 09/3/2004 14:55:43
It is a trunk design with flip down backseats. The taller the box the less depth i can get out of it. Thats why i asked about mounting them facing the ceiliing. Then i could make it about 14 inches tall, and be able to slide in about 25-30 inches deep and 32 across. However, for every inch of height you add after 14, you gotta knock off atleast 4 inches of depth. So if I made it 16 1/2 high, it'd be 32 across and abotu 15 deep. So im not sure which would be better. A huge box with them facing up, or a small box with them facing the trunk ?
uochronos on 09/3/2004 16:42:51
with 16.5x32x15 you still get a dimension of 4.58.... should be able to get around 2cubic feet per sub of internal volume with those dimensions.
swez on 09/3/2004 18:45:32
I have heard a few up firing sub systems in PU truck as there is so little room to do otherwise. It works in PU trucks as we have a higher ceiling airspace from front of the subs to roof.
In a trunk mount design, most top firing subs have very limited air space between the sub cones and trunk lid. This not only squashes bass waves, but it can really make the trunk lid rattle a lot..
In your case, the rear seats are sloped back at the top. The taller the box, the more depth of the box comes into play as the box comes in contact with rear seat backs. (correct?)
Here, a trapazoidal design might be very useful. The rear panel of the box is slanted to the same angle as rear seat backs and the front panel (speaker baffle panel) can be are the same angle as seat backs or vertical. (reverse wedge design).
Here's what I mean:
......_______
...../............/
..../______ / Full trapazoid modeling
==================================================
The reverse wedge seem like a good option as subs are aimed straight out to bumper and less angles to cut on panels. So here, we have say 16.5" in height, 32" in width. The only variables left, are the total depth and sub + divider wall. Getting the proper angle to fit tight against the rear seat backs is the key to a good fit.
If that is appealing to you, we can run some numbers and come up with a box size that will match your sub needs. Then testing that dimension of enclosure to ensure that you can indeed load it into your car. It may be easier to install this style box through the doors and the seats down.
What say you?
Swez
PS I cannot draw the reverse wedge in this forum format. But the only difference in reverse wedge design VS trapazoial, the front speaker mounting panel is 90 degrees vertical to the base of the box, not angled like the rear wall of the box. Can you picture that?
What is the best way to mount subs. by that i mean direction... facing the back of the trunk, facing up at the ceiling of the trunk, or facing the backseat. It seems like the easiest fit for this small trunk would be having them face upwards towards the ceiliing. I could make the box about 15 inches tall ... 32 inches wide, and 32 inches long ... i dont know how that would do for sound though. The face where the subs would be mounted would be 32"x15" .... but they would only have 14 inches underneath them, without counting the magnet space .. How do you think that will sound .. would it be better to make a small box and have them face the back of the trunk .. it would have to be alot smaller of a box .. prolly like 32 wide, 16 tall, and 18 long ... thanks guys
Replies (12)
P0werLifter on 09/3/2004 02:18:51
Glad to hear your got the CD player intalled and looking nice. Congrats GRIN
As far as the best way to mount the subwoofers, i havnt had much experience in dealing with subenclosures in trunks due tot he fact that most of my installs have been in trucks. In a truck, for SPL i reccomend facing the subwoofers up, but in your case, from what ive heard people say, either A. Face them towards the back of the trunk for the best SPL, or B. face the subs towards the rear seats for SQ. Again, i havnt had much experience with trunk sub placement but would be worth a shot.
BTW, are you using a sealed or Ported enclosure? If you go ported you will have more SPL output and more low end bass than Sealed if thats what your going for.
Im sure one of the others will be along shortly.
-Jason
uochronos on 09/3/2004 02:29:12
as to which way to face subs this is hit in miss. usualy they sound best facing which ever way gives them the most air room in front of them... however experimenting with differnt directions can help. my car i had them back up agaibnst the seat and facing the back of the trunk. in my buddies car they sound better facing toward the seat and backed up against the trunk area...
so really trying it is the only way to know which well sound best to you/
Black_Rob on 09/3/2004 02:38:04
I Will be making a Sealed enclosure ... i wanted ported but after actually getting the car and seeing the trunk, it just wouldnt be possible to get the cubic feet to make a dual 15 ported box ..... The website calls for 1.5-3.0 cubic feet of airspace. I can definately make it 32" acrossed ... its the height and depth that is hard. its either gotta be tall and slim or short and long ... i could probably pull of 32long 15high and 20 deep .. not sure what that comes to in CF ...... let me know what you guys think .... Swez, what do you think about the first question up top
uochronos on 09/3/2004 02:44:43
the dimensions you listed get about 5.5 cubic feet outside. well be slightly less internal volume. thats a good chunk of space to work with.
piece of advice make sure it well fite into the trunk. have seen people measure for hours build a box and it wont fit threw the trunk opening its very frustrating.
P0werLifter on 09/3/2004 02:46:39
32x15x20=9600 9600/1728= 5.55 cubic feet for the dimensions you stated. 15" is the maximum height you can go? My reccomendation would be to build the enclosure so the drivers point towards the rear of the trunk. Might be a bit tricky mounting the subs with such small parameters in the height department since your going to virtually have the enclosure the same height as the subwoofers (15"s tall)
-Jason
uochronos on 09/3/2004 03:11:04
mount subs at an angle:) if you can only make a 15" tall box then simply clant the end facing towards the back and you can get a 17" or so long pannel with only tilting it a little bit.
ttocs on 09/3/2004 12:11:18
always make sure that it will fit through the opening.. That is always a sad bit of humor to see an installer standing next to the car scratching his head, as the box is pearched above the opening...
ttocs on 09/3/2004 12:12:19
and glad to hear the deck went in well. Each install gets a little easier normally.
swez on 09/3/2004 13:00:08
Have to realize that if the sub OD is ~15" in diameter, means the sub mounting panels needs to be at least 16.5" tall if you mount the enclosure as a back firing design. (one that fires back toward the bumper) In most cases, this will be the best install option sound wise.
So, what we need to know is the max height the box can be and still allow for the subs to mount properly. Wedge designs can help if your overall usable height is >14.5" but less than 16.5".
With that height max number established, then we can manipulate width and depth dimensions of the box to get the targeted cf airspace recommended for the subs.
Do you see room for moree than 32" of Width across the trunk/hatch? If yes, we can do some additioional manipulations in Depth to make it work.
Is this a hatchback or trunk only design? Do the rear seats flip down as well?
Swez
Black_Rob on 09/3/2004 14:55:43
It is a trunk design with flip down backseats. The taller the box the less depth i can get out of it. Thats why i asked about mounting them facing the ceiliing. Then i could make it about 14 inches tall, and be able to slide in about 25-30 inches deep and 32 across. However, for every inch of height you add after 14, you gotta knock off atleast 4 inches of depth. So if I made it 16 1/2 high, it'd be 32 across and abotu 15 deep. So im not sure which would be better. A huge box with them facing up, or a small box with them facing the trunk ?
uochronos on 09/3/2004 16:42:51
with 16.5x32x15 you still get a dimension of 4.58.... should be able to get around 2cubic feet per sub of internal volume with those dimensions.
swez on 09/3/2004 18:45:32
I have heard a few up firing sub systems in PU truck as there is so little room to do otherwise. It works in PU trucks as we have a higher ceiling airspace from front of the subs to roof.
In a trunk mount design, most top firing subs have very limited air space between the sub cones and trunk lid. This not only squashes bass waves, but it can really make the trunk lid rattle a lot..
In your case, the rear seats are sloped back at the top. The taller the box, the more depth of the box comes into play as the box comes in contact with rear seat backs. (correct?)
Here, a trapazoidal design might be very useful. The rear panel of the box is slanted to the same angle as rear seat backs and the front panel (speaker baffle panel) can be are the same angle as seat backs or vertical. (reverse wedge design).
Here's what I mean:
......_______
...../............/
..../______ / Full trapazoid modeling
==================================================
The reverse wedge seem like a good option as subs are aimed straight out to bumper and less angles to cut on panels. So here, we have say 16.5" in height, 32" in width. The only variables left, are the total depth and sub + divider wall. Getting the proper angle to fit tight against the rear seat backs is the key to a good fit.
If that is appealing to you, we can run some numbers and come up with a box size that will match your sub needs. Then testing that dimension of enclosure to ensure that you can indeed load it into your car. It may be easier to install this style box through the doors and the seats down.
What say you?
Swez
PS I cannot draw the reverse wedge in this forum format. But the only difference in reverse wedge design VS trapazoial, the front speaker mounting panel is 90 degrees vertical to the base of the box, not angled like the rear wall of the box. Can you picture that?
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