Just wanted to throw up a couple pics of the finished fiberglass enclosure I did for a the mustang. Not installed yet but this enclosure fits in the trunk and is molded over the fender wells and to the sides of the trunk. Now its time to bust out the peanuts to officially know how much ^ft it is. I think it turned out good and as long as the floors mount properly, it'll turn out great! Enjoy and feel free to comment.
-PL
-I cut out alot of pictures to cut down on the bandwidth usage for the forum. If you want to see the whole build I can send you a link to a different thread. Any comments or questions are welcome. E-mail me at Trailmastertoy@aol.com
Replies (23)
swez on 11/21/2005 10:59:01
I can see part of the moon inside this huge black hole on pic #2. Hope this stang has a good suspension. This looks like 250-275 lbs already, plus the sub. SMILE
Nice craftsmenship dude!
Swez
P0werLifter on 11/21/2005 15:07:03
Thanks Swez, it was alot of work but the finished result was worth it. The customer is going to be very pleased with the end result GRIN . Overall the actual weight of the enclosure is fairly light without the sub, im going to say maybe 20lbs give or take a couple. The sub will add some but overall, a fairly light addition to the trunk :)
-PL
swez on 11/21/2005 15:22:02
Only 20 lbs? I take it you used a minimum amount of MDF and the rest is cloth, glassing, bondo and paint??? WOW, that is a big weight reduction as compared with your truck mounted sub.
Fine work buddy!
Swez
PS Is this vented or more like an EBS enclosure?
P0werLifter on 11/21/2005 17:20:51
Yup, very light install Swez compared to my truck. Only two parts of the enclosure are MDF, the mounting ring, and the front plate that is perfectly flat. The ring is constructed of 3/4" and the front plate is 1/2" MDF. The rest if composed of fiberglass =). The guy I'm doing it for wanted a clean, custom installation that didnt add excessive weight so i this was the best route to go.
As far as the Type of enclosure. These customer didnt want to give up too much room and wanted to maintain tight, clean , punchy bass so I decided to stick with sealed.
Thanks
-PL
Ash on 11/21/2005 17:59:23
Very Nice! What is it finished with?
P0werLifter on 11/21/2005 18:22:47
Ash,
The enclosures are painted with automotive paint matched to the exterior color of the mustang. After the paint was shot and was tacky, 4 layers of ClearCoat were added for the shine factor =)
-PL
P0werLifter on 11/21/2005 20:17:55
Ok, so I went out bought some packing penuts and made a 1cuFt box to measure the internal net volume of the enclosure. Came out to almost exactly 1.25^ft so after the sub displacement will work out to be about 1.15^ft1. Modeled it in my BassBox6 Pro software and shows a response curve that will mold nicely with the music he prefers. Should provide solid punchy response that wont dominate the music.
overall good results
-PL
swez on 11/21/2005 20:29:50
Good punch in the 60-110 Hz range here and that is very good too. I wonder what cabin gain effects might be like in the 50 Hz and down range? My guess, an 8-10dB bump would be anticipated.
Keep us posted on the actual performance of this system in the vehicle OK?
Swez
MrBrownstone on 11/23/2005 21:54:16
speaking of peanuts, looks like you busted a nut or 2 constructing that thing. Excellent work.
P0werLifter on 11/28/2005 21:14:53
Forgot to put up pictures of the floor so here they are, just plain MDF right now, but Vinyl pics are comming soon =)
-PL
swez on 11/29/2005 05:37:06
Pretty good carpentry here PL... like the way you angle cut and half-rounded that leading edge. Nice touch!
Swez
P0werLifter on 11/29/2005 12:36:57
Thanks Swez, it should look good vinyled so now im just waiting haha
Were running wire today in the car
-PL
BgDustin4 on 12/7/2005 20:52:07
all i can say is nice lol i hope to do this some day
Harvester on 12/12/2005 03:17:21
I give it a ten on the sharpness scale....pretty nice... hope to be able to construct things like that one of these days
P0werLifter on 12/12/2005 21:10:25
For those who care to see the finished product, here it is
Sorry dark pictures, didnt get done installing untill after darkfall. Sounds awesome, very clean and hits hard. Solid setup and the customer is happy with the results.
-PL
P0werLifter on 12/24/2005 02:06:20
^^^^Bump^^^^ for Swez
swez on 12/24/2005 11:16:42
Very nice work here PL!!! You are getting pretty darn good at custom installs and sub enclosures.
If you would, tell the guy to get some protective metal waffle grill covers for his subs. This will help protect them from any loose objects he may store in that area.
Also, it looks like the subs are basically firing at each other. I assume one sub is reverse wired (polarity 180 degrees out of phase) here? If not, much bass cancellation will be noted.
Am sure you knew that... but just in case others try a crossfire configuration, one woofer needs to be wired so that when one cone pushes out, the other cone is pulling in at the same time.
We can tell we have it right with plenty of deep bass noted. If the bass is thin sounding and not much low end, reverse the polarity on one sub to get best results.
Swez CLAP
P0werLifter on 12/24/2005 14:14:37
Thanks Swez. I was very pleased with the performance of the setup as is the guy I did it for. As far as running the subs, their wired normal, ones polarity isnt switched. Infact I have ran about 3 setups with the woofers facing eachother and have not encountered any cancelation. From what I've gathered from other installers is cancellation is more of an issue at the higher frequencies but not to much bass. Please correct me if I'm wrong, just I hanvt had any issues with cancelation so far.
-PL
PS. Merry X-mas
-PL
swez on 12/25/2005 12:50:22
If both subs were in the same enclosure and 1 is out of phase to the other, the bass will be weak and have little boom to it.
In this install, you have 2 enclosures. That may account for to good bass performance, even though the subs are facing each other. The next time you see this fellow, try reversing wire polarity to 1 sub and see if it makes any difference.
From my own tinkerings and such, I would expect better low bass performance in the "push-pull" configuration. Am perplexed that the current setup sounds as good as noted. When both cones are firing at each other and are in close proximity to each other, I cannot help but think there are not massive cancellations going on here. (when wired in phase)
I could be wrong on this one, as I have never done a car system in opposing woofer configuration. The way I invision this situation, is to have 2 guys, a few feet apart, facing each other, with water hoses. If they aim at each other's water streams, what happens when the water jets meet?
They smash together and the water jets disperse each others energy. The water winds up puddling and deflecting at the point of meeting right? If either guy changes the direction of their streams, they do not meet and cancellation problems are not an issue.
Well, sound waves behave in a similar manner. When they meet each other in an enclosed space, (like a trunk) and are in phase, the waves have some degree of cancellation. Especially if they aimed directly at each other. However, if the subs are aimed to a focal point, (say 20-30 degrees toward the front or back of the trunk) now they become "additive" to each other. (in phase)
In the pics above, it appears that each sub is angled about 10-15 degrees forward. Does that seem about right? That could indeed explain why the subs sound good in this configuration.
Comments?
Swez
P0werLifter on 12/25/2005 16:28:00
It makes sense what your talking about here, I just havnt experienced it in the installs I've done. If I see the guy again, I'll see if he wants to try it out. Its a bit of a pain in the arse to take the subs in and out of the enclosure due to the akward angle. The woofers are positioned about 15-20 degrees in the forward direction towards the cab.
-PL
ttocs on 12/25/2005 18:23:15
you can switch them at the amp if it is easier. You may even be able test this with out doing that. I have had many customers come in saying that their subs were moving, but making little or no noise and EVERYTHING is ALWAYS wired right. I'm not making fun of you on that one, it is just rare to have a customer come in and tell me he(or his buddy) wired it up and that is why it is not working... If the amp is ran in stereo, you can just disconnect one rca. By turning one sub off, there is no more cancellation, and then all of a suddon that one sub would start boomin. I always made sure I let the costomer see me doing this, as it was just funny to see his face when I would fix it in 2 seconds after they had probably spent at least 2 hrs(I would often strike a superman pose at this time too!). They would often argue with me then that could NOT be the problem...
Ah, the good old days........
P0werLifter on 12/25/2005 19:54:53
Good idea ttocs, but since everything sounded fine I dont really need to do anything lol. He also had brought it by one of the car audio shops in town because they wanted to see the work I can do (he bought alot of his equipment there) and i also want(ed) to get hired there eventually if i decide to keep doing audio work. They liked it said it sounded/looked great so everything is kosher. If i ever see the dude again i'll try it and just see if it works better.
swez on 12/25/2005 22:41:18
Well, I think the old saying... "If it ain't broke, don't fix it" applies in this situation.
The fact that the subs are angled to the front and not facing each other, (dead on axis) explains why this system works so well. If he is happy, you are satisfied and others say it rocks... leave it be.
Job well done!
Swez
-PL
-I cut out alot of pictures to cut down on the bandwidth usage for the forum. If you want to see the whole build I can send you a link to a different thread. Any comments or questions are welcome. E-mail me at Trailmastertoy@aol.com
Replies (23)
swez on 11/21/2005 10:59:01
I can see part of the moon inside this huge black hole on pic #2. Hope this stang has a good suspension. This looks like 250-275 lbs already, plus the sub. SMILE
Nice craftsmenship dude!
Swez
P0werLifter on 11/21/2005 15:07:03
Thanks Swez, it was alot of work but the finished result was worth it. The customer is going to be very pleased with the end result GRIN . Overall the actual weight of the enclosure is fairly light without the sub, im going to say maybe 20lbs give or take a couple. The sub will add some but overall, a fairly light addition to the trunk :)
-PL
swez on 11/21/2005 15:22:02
Only 20 lbs? I take it you used a minimum amount of MDF and the rest is cloth, glassing, bondo and paint??? WOW, that is a big weight reduction as compared with your truck mounted sub.
Fine work buddy!
Swez
PS Is this vented or more like an EBS enclosure?
P0werLifter on 11/21/2005 17:20:51
Yup, very light install Swez compared to my truck. Only two parts of the enclosure are MDF, the mounting ring, and the front plate that is perfectly flat. The ring is constructed of 3/4" and the front plate is 1/2" MDF. The rest if composed of fiberglass =). The guy I'm doing it for wanted a clean, custom installation that didnt add excessive weight so i this was the best route to go.
As far as the Type of enclosure. These customer didnt want to give up too much room and wanted to maintain tight, clean , punchy bass so I decided to stick with sealed.
Thanks
-PL
Ash on 11/21/2005 17:59:23
Very Nice! What is it finished with?
P0werLifter on 11/21/2005 18:22:47
Ash,
The enclosures are painted with automotive paint matched to the exterior color of the mustang. After the paint was shot and was tacky, 4 layers of ClearCoat were added for the shine factor =)
-PL
P0werLifter on 11/21/2005 20:17:55
Ok, so I went out bought some packing penuts and made a 1cuFt box to measure the internal net volume of the enclosure. Came out to almost exactly 1.25^ft so after the sub displacement will work out to be about 1.15^ft1. Modeled it in my BassBox6 Pro software and shows a response curve that will mold nicely with the music he prefers. Should provide solid punchy response that wont dominate the music.
overall good results
-PL
swez on 11/21/2005 20:29:50
Good punch in the 60-110 Hz range here and that is very good too. I wonder what cabin gain effects might be like in the 50 Hz and down range? My guess, an 8-10dB bump would be anticipated.
Keep us posted on the actual performance of this system in the vehicle OK?
Swez
MrBrownstone on 11/23/2005 21:54:16
speaking of peanuts, looks like you busted a nut or 2 constructing that thing. Excellent work.
P0werLifter on 11/28/2005 21:14:53
Forgot to put up pictures of the floor so here they are, just plain MDF right now, but Vinyl pics are comming soon =)
-PL
swez on 11/29/2005 05:37:06
Pretty good carpentry here PL... like the way you angle cut and half-rounded that leading edge. Nice touch!
Swez
P0werLifter on 11/29/2005 12:36:57
Thanks Swez, it should look good vinyled so now im just waiting haha
Were running wire today in the car
-PL
BgDustin4 on 12/7/2005 20:52:07
all i can say is nice lol i hope to do this some day
Harvester on 12/12/2005 03:17:21
I give it a ten on the sharpness scale....pretty nice... hope to be able to construct things like that one of these days
P0werLifter on 12/12/2005 21:10:25
For those who care to see the finished product, here it is
Sorry dark pictures, didnt get done installing untill after darkfall. Sounds awesome, very clean and hits hard. Solid setup and the customer is happy with the results.
-PL
P0werLifter on 12/24/2005 02:06:20
^^^^Bump^^^^ for Swez
swez on 12/24/2005 11:16:42
Very nice work here PL!!! You are getting pretty darn good at custom installs and sub enclosures.
If you would, tell the guy to get some protective metal waffle grill covers for his subs. This will help protect them from any loose objects he may store in that area.
Also, it looks like the subs are basically firing at each other. I assume one sub is reverse wired (polarity 180 degrees out of phase) here? If not, much bass cancellation will be noted.
Am sure you knew that... but just in case others try a crossfire configuration, one woofer needs to be wired so that when one cone pushes out, the other cone is pulling in at the same time.
We can tell we have it right with plenty of deep bass noted. If the bass is thin sounding and not much low end, reverse the polarity on one sub to get best results.
Swez CLAP
P0werLifter on 12/24/2005 14:14:37
Thanks Swez. I was very pleased with the performance of the setup as is the guy I did it for. As far as running the subs, their wired normal, ones polarity isnt switched. Infact I have ran about 3 setups with the woofers facing eachother and have not encountered any cancelation. From what I've gathered from other installers is cancellation is more of an issue at the higher frequencies but not to much bass. Please correct me if I'm wrong, just I hanvt had any issues with cancelation so far.
-PL
PS. Merry X-mas
-PL
swez on 12/25/2005 12:50:22
If both subs were in the same enclosure and 1 is out of phase to the other, the bass will be weak and have little boom to it.
In this install, you have 2 enclosures. That may account for to good bass performance, even though the subs are facing each other. The next time you see this fellow, try reversing wire polarity to 1 sub and see if it makes any difference.
From my own tinkerings and such, I would expect better low bass performance in the "push-pull" configuration. Am perplexed that the current setup sounds as good as noted. When both cones are firing at each other and are in close proximity to each other, I cannot help but think there are not massive cancellations going on here. (when wired in phase)
I could be wrong on this one, as I have never done a car system in opposing woofer configuration. The way I invision this situation, is to have 2 guys, a few feet apart, facing each other, with water hoses. If they aim at each other's water streams, what happens when the water jets meet?
They smash together and the water jets disperse each others energy. The water winds up puddling and deflecting at the point of meeting right? If either guy changes the direction of their streams, they do not meet and cancellation problems are not an issue.
Well, sound waves behave in a similar manner. When they meet each other in an enclosed space, (like a trunk) and are in phase, the waves have some degree of cancellation. Especially if they aimed directly at each other. However, if the subs are aimed to a focal point, (say 20-30 degrees toward the front or back of the trunk) now they become "additive" to each other. (in phase)
In the pics above, it appears that each sub is angled about 10-15 degrees forward. Does that seem about right? That could indeed explain why the subs sound good in this configuration.
Comments?
Swez
P0werLifter on 12/25/2005 16:28:00
It makes sense what your talking about here, I just havnt experienced it in the installs I've done. If I see the guy again, I'll see if he wants to try it out. Its a bit of a pain in the arse to take the subs in and out of the enclosure due to the akward angle. The woofers are positioned about 15-20 degrees in the forward direction towards the cab.
-PL
ttocs on 12/25/2005 18:23:15
you can switch them at the amp if it is easier. You may even be able test this with out doing that. I have had many customers come in saying that their subs were moving, but making little or no noise and EVERYTHING is ALWAYS wired right. I'm not making fun of you on that one, it is just rare to have a customer come in and tell me he(or his buddy) wired it up and that is why it is not working... If the amp is ran in stereo, you can just disconnect one rca. By turning one sub off, there is no more cancellation, and then all of a suddon that one sub would start boomin. I always made sure I let the costomer see me doing this, as it was just funny to see his face when I would fix it in 2 seconds after they had probably spent at least 2 hrs(I would often strike a superman pose at this time too!). They would often argue with me then that could NOT be the problem...
Ah, the good old days........
P0werLifter on 12/25/2005 19:54:53
Good idea ttocs, but since everything sounded fine I dont really need to do anything lol. He also had brought it by one of the car audio shops in town because they wanted to see the work I can do (he bought alot of his equipment there) and i also want(ed) to get hired there eventually if i decide to keep doing audio work. They liked it said it sounded/looked great so everything is kosher. If i ever see the dude again i'll try it and just see if it works better.
swez on 12/25/2005 22:41:18
Well, I think the old saying... "If it ain't broke, don't fix it" applies in this situation.
The fact that the subs are angled to the front and not facing each other, (dead on axis) explains why this system works so well. If he is happy, you are satisfied and others say it rocks... leave it be.
Job well done!
Swez
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