It's me again Margaret...
Hey all, I went ahead and picked up that 12w7 I mentioned in a previous post, and I was just wondering what the best way to mount it is going to be (I'm gonna build a box for it). I updated my profile, so it should say this already, but I drive an '87 4Runner which has plenty of room in the back for the configuration I choose. I guess a better question might be...what are the advantages of each mounting method? Are there others (like upward)?
Thanks,
Pinch
Replies (4)
johndavid400 on 07/3/2003 18:42:09
I had a W7 in my eclipse firing straight up toward the glass of the hatch and it sounded awesome (sealed custom box 19"x16"x11.75"), likewise I built a system in a friends 300zx TT and fired his W7 straight up at the glass and it sounded even better (I think because it had less air to move in the cabin of the car). As far as a 4 runner..... I would guess that just about any way that you fire it will sound good... I fired mine up because they are so freakin heavy, I wanted there to be as little strain on the baffle as possible. By the way, when you say firing downward, do you mean mounting the W7 upside down (inverted)... or turning the normally mounted W7 box upside down? If the box's construction is to be the same either way and you are asking which direction the box should face.... why not just try it each way and see which sounds the best to you?
Pinch on 07/3/2003 18:59:31
Well, I would like to build it in a way where I can adjust it like you say and just see what sounds best. However, I've seen a few designs where when the box is mounted in place, the subs face downward. I'm not sure what advantage that offers, but I guess it would aid in rattling the vehicle from the frame. ;) Without having any experience in the world of w7 my guess would be that I should make it face forward. This way I can tweak the phase adjustment on my amp directly instead of having the sound bounce off the glass or something first (wouldn't that invert the wave like when you shake a rope tied to a door knob?)
Was your box just carpeted 3/4" MDF John? Or did you delve into fiberglassing? I dunno if fiberglass is necessary, but it weighs a lot less than MDF, and since the 12w7 weighs nearly 50 lbs by itself weight should probably be a consideration. Hmm, lots to consider here.
Swez on 07/3/2003 20:35:57
As others have mentioned, you might wish to experiment on up, forward and rear firing sub placements.
I have found in most SUV's, that firing back toward the rear bumper is the best overall performer. Bass waves are long and the more space you have between the sub cone and the nearest reflective surface... the better the bass will be.
Did install a very modest sub system for a friend using 2x8" ported and tried both upward firing and rear firing. No question about it... the rear position was much better than upward firing in a Chevy S-10 Blazer 4 door SUV.
If you had a pick up truck with limited space, side or upward firing makes sense due to the lack of space. Some opt for downward firing as they had to mount the enclosure under the rear seat or limited cargo area. But here, one has to consider the sub cone energy is blasted right into the floor. I would think that would produce a lot of added cone resistance (SPL energy) and cancellations.
If given the choice of down firing, it would make a lot of sense to me to angle the sub(s) in such a way as to provide a tuned chute or angled panel to direct the bass waves down and outward at the same time. Have never tried this idea out yet... but if that opportunity comes my way in the future, that's probably what I would play with first.
Anybody ever consider such a design as this in a PU w/ limited rear floor space... Crew cab or similar?
Swez
Relax_The_Mind on 07/4/2003 04:10:39
Yes... SUV Most every setup I have seen at shows and competitions are large ported boxes mounted up against the rear seat and facing the back. To get the most out of that sub (especially the money) I would go with a ported box. JL website gives you details on the perfect box to build anyways.
RTM
Hey all, I went ahead and picked up that 12w7 I mentioned in a previous post, and I was just wondering what the best way to mount it is going to be (I'm gonna build a box for it). I updated my profile, so it should say this already, but I drive an '87 4Runner which has plenty of room in the back for the configuration I choose. I guess a better question might be...what are the advantages of each mounting method? Are there others (like upward)?
Thanks,
Pinch
Replies (4)
johndavid400 on 07/3/2003 18:42:09
I had a W7 in my eclipse firing straight up toward the glass of the hatch and it sounded awesome (sealed custom box 19"x16"x11.75"), likewise I built a system in a friends 300zx TT and fired his W7 straight up at the glass and it sounded even better (I think because it had less air to move in the cabin of the car). As far as a 4 runner..... I would guess that just about any way that you fire it will sound good... I fired mine up because they are so freakin heavy, I wanted there to be as little strain on the baffle as possible. By the way, when you say firing downward, do you mean mounting the W7 upside down (inverted)... or turning the normally mounted W7 box upside down? If the box's construction is to be the same either way and you are asking which direction the box should face.... why not just try it each way and see which sounds the best to you?
Pinch on 07/3/2003 18:59:31
Well, I would like to build it in a way where I can adjust it like you say and just see what sounds best. However, I've seen a few designs where when the box is mounted in place, the subs face downward. I'm not sure what advantage that offers, but I guess it would aid in rattling the vehicle from the frame. ;) Without having any experience in the world of w7 my guess would be that I should make it face forward. This way I can tweak the phase adjustment on my amp directly instead of having the sound bounce off the glass or something first (wouldn't that invert the wave like when you shake a rope tied to a door knob?)
Was your box just carpeted 3/4" MDF John? Or did you delve into fiberglassing? I dunno if fiberglass is necessary, but it weighs a lot less than MDF, and since the 12w7 weighs nearly 50 lbs by itself weight should probably be a consideration. Hmm, lots to consider here.
Swez on 07/3/2003 20:35:57
As others have mentioned, you might wish to experiment on up, forward and rear firing sub placements.
I have found in most SUV's, that firing back toward the rear bumper is the best overall performer. Bass waves are long and the more space you have between the sub cone and the nearest reflective surface... the better the bass will be.
Did install a very modest sub system for a friend using 2x8" ported and tried both upward firing and rear firing. No question about it... the rear position was much better than upward firing in a Chevy S-10 Blazer 4 door SUV.
If you had a pick up truck with limited space, side or upward firing makes sense due to the lack of space. Some opt for downward firing as they had to mount the enclosure under the rear seat or limited cargo area. But here, one has to consider the sub cone energy is blasted right into the floor. I would think that would produce a lot of added cone resistance (SPL energy) and cancellations.
If given the choice of down firing, it would make a lot of sense to me to angle the sub(s) in such a way as to provide a tuned chute or angled panel to direct the bass waves down and outward at the same time. Have never tried this idea out yet... but if that opportunity comes my way in the future, that's probably what I would play with first.
Anybody ever consider such a design as this in a PU w/ limited rear floor space... Crew cab or similar?
Swez
Relax_The_Mind on 07/4/2003 04:10:39
Yes... SUV Most every setup I have seen at shows and competitions are large ported boxes mounted up against the rear seat and facing the back. To get the most out of that sub (especially the money) I would go with a ported box. JL website gives you details on the perfect box to build anyways.
RTM
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