Sub Woofer Installation, Tried to get better Audio without carving up the car |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Sub Woofer Installation, Tried to get better Audio without carving up the car |
Mikey914 |
Jun 1 2020, 12:15 PM
Post
#101
|
The rubber man Group: Members Posts: 12,625 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Ours will have a larger cavity behind it and will be side vented. This should yeild better quality sound.
|
horizontally-opposed |
Jun 1 2020, 12:36 PM
Post
#102
|
Advanced Member Group: Members Posts: 3,430 Joined: 12-May 04 From: San Francisco Member No.: 2,058 Region Association: None |
Ours will have a larger cavity behind it and will be side vented. This should yeild better quality sound. (IMG:style_emoticons/default/beerchug.gif) If you can do it with a stock appearance and minimal or no loss in legroom, you've got a customer lined up right here. Amp is ready with a fifth channel, and I'm holding off on buying a subwoofer until I see your setup. Thank you for doing this! |
Mikey914 |
Jun 1 2020, 12:39 PM
Post
#103
|
The rubber man Group: Members Posts: 12,625 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
That's exactly what we are shooting for. Just been a bit busy with the fiberglass today.
|
RoadGlue |
Jun 1 2020, 01:01 PM
Post
#104
|
Sonoma County Gear Head Group: Admin Posts: 2,033 Joined: 8-January 03 From: Santa Rosa, CA Member No.: 108 Region Association: Northern California |
Ours will have a larger cavity behind it and will be side vented. This should yeild better quality sound. Just a few notes from an audio geek - Vented enclosures are a tuned system, meaning the port size is very much dependent on the driver's specifications and internal volume of the enclosure. The advantage of a vented enclosure over a sealed box is only power efficiency and SPL. The trade-off is that vented enclosures are typically a lot larger than than sealed boxes, and that the boosted frequencies from the port are usually a pretty narrow frequency range. If you vent the enclosure but it's not done in accordance to the driver's specifications you'll end up screwing the pooch. You'll get peaks at a higher frequency that the sub isn't able to play - for example it might actually be quieter than a sealed box at normal sub frequencies and then have a big peak of volume at 300 hz which it isn't playing anyway. Since a ported box is open, the sub also requires that all of its suspension comes from it's spider and voice coil, and if it's not tuned correctly you can over drive it more easily than you could with a sealed box which, in a way, keeps the driver under better control. My advice would be to make the largest sealed box you can throw at this project using a subwoofer that works great in smaller, sealed enclosures, and mate it with a high powered class D amp. The class D amps are so small they easily fit under the dash. If you must go ported, you need to model it using any number of free software apps to make sure it's all makes sense. Again, I'm not sure if you're planning on offering this with a woofer, which would be the only way a tuned, vented box would work. If you're not offering the box with the sub, then it really has to be a sealed enclosure. Sorry if this is all stuff you already knew. Cheers! |
horizontally-opposed |
Jun 1 2020, 03:24 PM
Post
#105
|
Advanced Member Group: Members Posts: 3,430 Joined: 12-May 04 From: San Francisco Member No.: 2,058 Region Association: None |
Ours will have a larger cavity behind it and will be side vented. This should yeild better quality sound. Just a few notes from an audio geek - Vented enclosures are a tuned system, meaning the port size is very much dependent on the driver's specifications and internal volume of the enclosure. The advantage of a vented enclosure over a sealed box is only power efficiency and SPL. The trade-off is that vented enclosures are typically a lot larger than than sealed boxes, and that the boosted frequencies from the port are usually a pretty narrow frequency range. If you vent the enclosure but it's not done in accordance to the driver's specifications you'll end up screwing the pooch. You'll get peaks at a higher frequency that the sub isn't able to play - for example it might actually be quieter than a sealed box at normal sub frequencies and then have a big peak of volume at 300 hz which it isn't playing anyway. Since a ported box is open, the sub also requires that all of its suspension comes from it's spider and voice coil, and if it's not tuned correctly you can over drive it more easily than you could with a sealed box which, in a way, keeps the driver under better control. My advice would be to make the largest sealed box you can throw at this project using a subwoofer that works great in smaller, sealed enclosures, and mate it with a high powered class D amp. The class D amps are so small they easily fit under the dash. If you must go ported, you need to model it using any number of free software apps to make sure it's all makes sense. Again, I'm not sure if you're planning on offering this with a woofer, which would be the only way a tuned, vented box would work. If you're not offering the box with the sub, then it really has to be a sealed enclosure. Sorry if this is all stuff you already knew. Cheers! Very interesting, and appreciated. Wonder if the solution isn't to have a port with a screw-on lid? Then the owner can experiment? Running a 5-channel amp by JL, with a Class D mono for a sub (I think...need to go look at the box, as it's been sitting a long while—as better audio in my 914 has been pretty low down the list!). |
bbrock |
Jun 1 2020, 07:14 PM
Post
#106
|
914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Ours will have a larger cavity behind it and will be side vented. This should yeild better quality sound. Just a few notes from an audio geek - Vented enclosures are a tuned system, meaning the port size is very much dependent on the driver's specifications and internal volume of the enclosure. The advantage of a vented enclosure over a sealed box is only power efficiency and SPL. The trade-off is that vented enclosures are typically a lot larger than than sealed boxes, and that the boosted frequencies from the port are usually a pretty narrow frequency range. If you vent the enclosure but it's not done in accordance to the driver's specifications you'll end up screwing the pooch. You'll get peaks at a higher frequency that the sub isn't able to play - for example it might actually be quieter than a sealed box at normal sub frequencies and then have a big peak of volume at 300 hz which it isn't playing anyway. Since a ported box is open, the sub also requires that all of its suspension comes from it's spider and voice coil, and if it's not tuned correctly you can over drive it more easily than you could with a sealed box which, in a way, keeps the driver under better control. My advice would be to make the largest sealed box you can throw at this project using a subwoofer that works great in smaller, sealed enclosures, and mate it with a high powered class D amp. The class D amps are so small they easily fit under the dash. If you must go ported, you need to model it using any number of free software apps to make sure it's all makes sense. Again, I'm not sure if you're planning on offering this with a woofer, which would be the only way a tuned, vented box would work. If you're not offering the box with the sub, then it really has to be a sealed enclosure. Sorry if this is all stuff you already knew. Cheers! (IMG:style_emoticons/default/agree.gif) My preference is for a sealed box. If it is vented, I'll just wind up sealing it myself. I'm looking for the tight punch of a sealed box rather than big boom of ported anyway. Louder is not necessarily better. FWIW, you can see my sub installed on a foot board a couple pages back. Sounds like shit compared to mounted in a box. Even just running this sub in the cardboard box it shipped in sounds way better than free air on the board. Sure, even on the board it sounds way better than not having a sub at all, but it really needs a proper enclosure to get the best sound. For keeping foot space, I'm planning to bottom mount my sub under the face and install an expanded metal grate over it to protect the cone from feet. Also, my Class D amp fits nicely inside the center console for a completely stealth install. |
Chris914n6 |
Jun 1 2020, 10:12 PM
Post
#107
|
Jackstands are my life. Group: Members Posts: 3,287 Joined: 14-March 03 From: Las Vegas, NV Member No.: 431 Region Association: Southwest Region |
|
Mikey914 |
Jun 2 2020, 02:19 AM
Post
#108
|
The rubber man Group: Members Posts: 12,625 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Easier to sell un-vented.
|
bbrock |
Aug 16 2020, 05:29 PM
Post
#109
|
914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
(IMG:style_emoticons/default/icon_bump.gif) Just checking on the status of the sub boxes @Mikey914 (IMG:style_emoticons/default/beerchug.gif)
|
Mikey914 |
Aug 16 2020, 05:56 PM
Post
#110
|
The rubber man Group: Members Posts: 12,625 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Tooling underway 3 weeks give or take for parts.
|
bbrock |
Aug 16 2020, 06:04 PM
Post
#111
|
914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Tooling underway 3 weeks give or take for parts. (IMG:style_emoticons/default/thumb3d.gif) Thanks! Can't wait to give them a shake down. (IMG:style_emoticons/default/biggrin.gif) |
eric9144 |
Aug 17 2020, 10:49 AM
Post
#112
|
Advanced Member Group: Members Posts: 2,731 Joined: 30-March 11 From: San Diego, CA Member No.: 12,876 Region Association: Southern California |
Tooling underway 3 weeks give or take for parts. (IMG:style_emoticons/default/popcorn[1].gif) My stereo is actually pretty neat but its missing a sub, this would round out the sound really well...can't wait! |
McMark |
Aug 17 2020, 03:57 PM
Post
#113
|
914 Freak! Group: Retired Admin Posts: 20,177 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
A little late to the party, but here's mine. 6" between the seats. I have bumped my elbow a total of two times. Otherwise I don't notice it's there (aside from the THUMP THUMP). (IMG:style_emoticons/default/shades.gif)
(IMG:http://www.914world.com/bbs2/uploads/post-419-1399310499.jpg) |
bbrock |
Aug 17 2020, 04:08 PM
Post
#114
|
914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
A little late to the party, but here's mine. 6" between the seats. I have bumped my elbow a total of two times. Otherwise I don't notice it's there (aside from the THUMP THUMP). (IMG:style_emoticons/default/shades.gif) (IMG:http://www.914world.com/bbs2/uploads/post-419-1399310499.jpg) Is that a JL Audio 8" sub? That was the first one I bought for my car and the sound was amazing! Unfortunately, it didn't quite fit in the footwell recess for a full stealth installation but man do I miss that sound. I kind of wish I had never heard it now. So tight and punchy. |
Rand |
Aug 17 2020, 04:35 PM
Post
#115
|
Cross Member Group: Members Posts: 7,409 Joined: 8-February 05 From: OR Member No.: 3,573 Region Association: None |
I remember experiencing Troy's foot thumper. It took up no more space than the OG footwell foam piece. And it worked! The carpet over it, so stealthy. The right grill and you don't have to worry about foot damage like Rob's. Footwell has so much better bass potential.The thump is always better coming from the feet.
|
bbrock |
Dec 19 2020, 01:06 PM
Post
#116
|
914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Tooling underway 3 weeks give or take for parts. (IMG:style_emoticons/default/thumb3d.gif) Thanks! Can't wait to give them a shake down. (IMG:style_emoticons/default/biggrin.gif) @Mikey914 Any updates on these? |
Mikey914 |
Dec 19 2020, 10:50 PM
Post
#117
|
The rubber man Group: Members Posts: 12,625 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None |
Still working on the tooling to mass produce these. Should be January
|
bbrock |
Dec 19 2020, 11:01 PM
Post
#118
|
914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Still working on the tooling to mass produce these. Should be January Thanks for the update (IMG:style_emoticons/default/thumb3d.gif) |
eric9144 |
Dec 21 2020, 07:10 PM
Post
#119
|
Advanced Member Group: Members Posts: 2,731 Joined: 30-March 11 From: San Diego, CA Member No.: 12,876 Region Association: Southern California |
Still working on the tooling to mass produce these. Should be January (IMG:style_emoticons/default/party.gif) |
windforfun |
Dec 21 2020, 07:17 PM
Post
#120
|
Senior Member Group: Members Posts: 1,766 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None |
I made this one, with a dedicated power amp for the sub and four other speakers it's probably over kill for a concert hall the size of a 914 cockpit. (IMG:style_emoticons/default/biggrin.gif) Very nice. What amps did you use? I think you need to vacuum your car. 8^) |
Lo-Fi Version | Time is now: 29th March 2024 - 05:07 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |