Footwell Sub Box?

[TowDawg]

Does anyone have any pics/dimensions/drawings they could share of passenger footwell sub box?
I upgraded to a JL8 in the stock location a while ago, but it still just doesn't sound all that great and I finally want to get around to making a box for the footwell so the sound has somewhere to bounce around.
There were threads on the Morgue and Alley about it, but their either unavailable completely or the pics have been removed.

I hope someone can get some pics and dimensions up on here. I'll just re-use the sub and amp I have now and build a new box for the footwell.

[98intrigue]

I can take pictures of mine, but have no idea about the dimensions since I bought the car with it already installed.

[FrgMstr]

I had mine done and the glass enclosure was built using the footwell of the car as the mold. The trick is building it with just enough air in it to hit solid. I have mine out of the car right now so I shot you a few pics. My wife is 5 foot tall, so it does not bother her at all as her feet can barely reach it. When you get to 6 foot passengers, it is OK, but not something you would want to log 300 miles in. I have one buddy that is 6'3" and he can still get in an out easily, but he has to sort of cross his legs as the ankles will be comfortable. As for the sound, it is awesome. I tried to go the route of building a custom box for the middle....don't waste your money. You simply cannot get enough air in there for good bass. I reposted my thread below from my build a few years ago. Hope this helps.

http://kylebennett.com/files/kyle/viper/Sub%20Box%20Dimensions%201.jpg

http://kylebennett.com/files/kyle/viper/Sub%20Box%20Dimensions%202.jpg

http://kylebennett.com/files/kyle/viper/Sub%20Box%20Dimensions%203.jpg

http://kylebennett.com/files/kyle/viper/Sub%20Box%20Dimensions%204.jpg

__________________________________________________ _______________________

All my work was done by Earmark Car Audio in Plano, TX (http://www.earmarkcaraudio.com/locations_plano.asp). Kosal was my installer and I could not be happier with his attention to detail and project commitment.

Put these Focal 165 KRX2 in my doors and dash.

2 way driver kit 165 KRX2 - Focal Car Audio speakers (http://www.focal.com/en/car-audio-sound/haut-parleurs/kits-2-voies-se-pare-es/165-krx2.php)

http://www.focal.com/180-614-thickbox/165-krx2.jpg

Put this 8" short throw JL Audio 8W3v3-4 sub in the floorboard of the passenger seat in a custom box. Kosal and I spent a LOT of time getting this box down to exactly the smallest dimension we could and still allow it to fire properly. Hearing it in the car, you would think it is a 10" or 12" woofer. The sound is amazing, and there is still plenty of room for riders.

JL Audio 8W3v3-4 Subwoofers - Car Audio Subwoofers (http://www.jlaudio.com/8w3v3-4-car-audio-w3v3-subwoofer-drivers-92148)

http://mediacdn.shopatron.com/media/mfg/9013/product_image/thm/t324_8939e5744d6d3d9198202449f82a8738.jpg?13225283 17

Using this Kenwood head unit, or rather the KIV-BT901 digital media receiver. Cool if you have an iphone, you can stream Pandora. Has integrated port for backup camera as well that has some very cool split screen features. The head unit works great with my iPod. Will not stream from my Android phone though. Bluetooth does work fine with the phone though.

Kenwood Digital Media Receiver (http://www.kenwoodusa.com/UserFiles/Media/Common/2011-KIV/us/index.html)

http://www.kenwoodusa.com/UserFiles/Media/Common/2011-KIV/us/img/ipod_i1p.jpg

http://www.kenwoodusa.com/UserFiles/Media/Common/2011-KIV/us/img/oth_p01_big.jpg

Pushing it all with this JL Audio HD900/5 900 watt amp. Earmark tucked this beauty in my trunk making sure not to leave any screws pointing through to my fuel cell, which had been on my last Gen III Viper.

JL Audio HD900/5 Amplifiers - Car Audio Amps & Amplifiers (http://mobile.jlaudio.com/products_amps.php?amp_id=537)

http://mediacdn.shopatron.com/media/mfg/9013/product_image/thm/t505_786ff4465919ca731a745b71513224d2.jpg?13225283 17


We toyed with building a new box to sit between the seats in the factory stock position. We tried our best to get a true subwoofer sound out of the space but it just was not happening. The Hertz woofer proved to be too anemic for the box and we moved to a JL 8W1v2-4 (http://www.jlaudio.com/8w1v2-4-car-audio-w1v2-subwoofer-drivers-92070). Still we just could not get the sound out of the box that we wanted although the JL sounded a lot better.
http://mediacdn.shopatron.com/media/mfg/9013/product_image/thm/t312_28f579c80d437cf03e0f0165a729c34a.jpg?13225283 17
We ended up using the center console JL as a mid-bass instead of a true sub-woofer. The inclusion of the mid-bass abosolutely ended up KICKING ASS overall as it added a lot of balance to the sound in the cabin, with the top up or down. Probably would have not gone the expense had I known the limitations up front, but we were experimenting with seeing if we could forego the box in the passenger footwell.



Sounds like you are sitting 7th row center at Carnegie Music Hall. And Brass Monkey kicks much ass as well.

Here are some pics of the install by Earmark Car Audio Plano (http://www.earmarkcaraudio.com/locations_plano.asp).

http://kylebennett.com/files/kyle/viper/Green/stereo/08ViperStereo01.jpg
http://kylebennett.com/files/kyle/viper/Green/stereo/08ViperStereo02.jpg
http://kylebennett.com/files/kyle/viper/Green/stereo/08ViperStereo03.jpg
http://kylebennett.com/files/kyle/viper/Green/stereo/08ViperStereo04.jpg

We had to go with the stock JL cover to give the cone the excursion it needed. The Hertz speaker got ganked, as it sounded horrid.

http://kylebennett.com/files/kyle/viper/Green/stereo/08ViperStereo06.jpg


The JL woofer in the passenger floorwell. It is tucked back in there pretty darn good. Sounds AMAZING.

http://kylebennett.com/files/kyle/viper/Green/stereo/08ViperStereo07.jpg
http://kylebennett.com/files/kyle/viper/Green/stereo/08ViperStereo08.jpg
http://kylebennett.com/files/kyle/viper/Green/stereo/08ViperStereo09.jpg

Backup Camera hangs over the X in Texas.

http://kylebennett.com/files/kyle/viper/Green/License_Plate.jpg

[TowDawg]

Thanks guys!
Your box looks like how I was planning on doing it, but the other threads I found said you needed to have the sub firing towards the firewall to give the bass something to bounce off of, which does make sense. I just can't figure out exactly how to build the box and position it in there with the sub firing forward and know how much room to leave open for it.
I've already built a center box like you have and used the JL8v3 in it. It just still doesn't sound good (much better than stock though) because you mainly hear the sub excursion instead of the bass itself.

[FrgMstr]

We looked at doing it firing at the firewall, but you have to put it so far back to give the sub room for excursion that the box ends up being bigger and giving less leg room. I would fully suggest that you would not be disappointed with doing it firing towards the cockpit. That little sub punches HARD. IIRC correctly we built the box with ~.75 cubic feet of air to move in the box. JBL should be able to tell you how much air is needed to be optimal. Bottom line is you sort of have to take what you can get in a Gen III/IV Viper.

[SEASnake]

Here's the 8" JL - 0.3 cu ft (net) is optimal internal volume: http://www.jlaudio.com/8w3v3-4-car-audio-w3v3-subwoofer-drivers-92148

So 0.43 cu ft internal volume would be ideal once the sub is factored in. Is there a reason you went with 0.75?

[FrgMstr]

Here's the 8" JL - 0.3 cu ft (net) is optimal internal volume: http://www.jlaudio.com/8w3v3-4-car-audio-w3v3-subwoofer-drivers-92148

So 0.43 cu ft internal volume would be ideal once the sub is factored in. Is there a reason you went with 0.75?

"IIRC" - If I recall correctly. Apparently not....was only 3 years ago and I did not build it. Hence saying he needed to check. :)

[Hammer]

I had a buddy make one out of fiberglass for me last summer and it fires into the cockpit as well.
Most of my vehicles have had a subwoofer or two in them, usually (2) 10" subs but have used (4) 10" subs in one car and my last one had (2) 12" subs in it.

I knew I wouldn't be getting that kind of output from this tiny 8" subwoofer but I was quite surprised by what it is capable of! I've outgrown the need for anything crazy and this actually hits quite hard!

I'm not sure the exact measurements of it or it's displacement, my friend built it to what he said was close to what my Alpine Type R called for. I had sent him the front pictures of FrgMstr's install and was expecting the square finish on it but he went a little different which was fine with me! He figured it would give a tiny bit more legroom for the feet on either side of it and avoid blocking off any air conditioning.

I wouldn't worry about facing it towards the firewall, they sound great facing out!

http://i187.photobucket.com/albums/x202/hammerchuk/Viper%20SRT-10/BD81DFDE-7244-4B05-8DF0-F3D2E3EE3F36.jpg (http://s187.photobucket.com/user/hammerchuk/media/Viper%20SRT-10/BD81DFDE-7244-4B05-8DF0-F3D2E3EE3F36.jpg.html)
http://i187.photobucket.com/albums/x202/hammerchuk/Viper%20SRT-10/E10E6BB3-E9CB-427E-9A42-1AD8AF81A318.jpg (http://s187.photobucket.com/user/hammerchuk/media/Viper%20SRT-10/E10E6BB3-E9CB-427E-9A42-1AD8AF81A318.jpg.html)
http://i187.photobucket.com/albums/x202/hammerchuk/D812BA62-183B-4CE4-96C2-362FA0F4F161-1604-00000271E62ADEF9_zps7c0f24da.jpg (http://s187.photobucket.com/user/hammerchuk/media/D812BA62-183B-4CE4-96C2-362FA0F4F161-1604-00000271E62ADEF9_zps7c0f24da.jpg.html)
http://i187.photobucket.com/albums/x202/hammerchuk/Viper%20SRT-10/F248DC80-EE7A-4FA0-9499-EDAF28286387.jpg (http://s187.photobucket.com/user/hammerchuk/media/Viper%20SRT-10/F248DC80-EE7A-4FA0-9499-EDAF28286387.jpg.html)

[SEASnake]

"IIRC" - If I recall correctly. Apparently not....was only 3 years ago and I did not build it. Hence saying he needed to check. :)

I suppose I could have paid attention to the huge pics with the tape measure - no way you could get .75 from those dimensions :lol2:

[TowDawg]

Well, just yanked the seat out and my amp was flashing the "low ohm" warning, which means it's in "protect mode" and not really supplying any power. That explains why the sub in the bulkhead went just went to shit. Hooked it up with different wires to an old bazooka I had laying around and works perfectly. Either the sub is blown, or something's wrong with the wiring from the amp to the sub.
Either way, I know the amp is fine, but I'll get a new one anyway. It's an old 250/1v1 and doesn't have the plug in for the JL remote bass knob that I have in my other cars and absolutely love. Hopefully it's the wiring and the sub is OK so I can just re-use it in the footwell box.

[Getnlwr]

I love the foot well boxes. I have a couple spare rockford bd1000 power series amps laying around from my last vehicle I want to put to use. Id want to put in atleast a 12" sub though.

[FrgMstr]

I suppose I could have paid attention to the huge pics with the tape measure - no way you could get .75 from those dimensions :lol2:

Yeah, I should have paid attention to that as well!

[TowDawg]

How's this for a footwell sub? Lol
I will say it hits like a sonofabitch!

[1bad540]

How would that tube hit in the trunk? I have 2 of them lying around myself!

[TowDawg]

The trunk is isolated and sealed in these cars, I think you'd end up using a lot of Dynomat to keep it form rattling and still wouldn't get shit from it in the cabin.
I didn't know I even had it, but I used it to test my amp because it was giving a low ohm warning. Turns out the 8w3 I had in the center console died.
I figured I'd throw it down there and see how it sounded. The funny part is, I had to pull the fire extinguisher and seat to get it in there. Then when I tried to put the seat back in, I couldn't get it far enough forward to put any mounting bolts back in. I'v got the lap belts from my 6-points holding the seat down. hahaaaa

I'll pull it tomorrow afternoon and get started on the box down there. Gotta get another speaker though.

[Hammer]

LOL!!! I first tested my car with the subwoofer and two speakers for my computer plugged into the wall in the garage to see what bass would be like in the car lol.

I tried it in the trunk as well and you wouldn't even know there was a sub in there from inside the car. That's what convinced me I HAD to go footwell.

[My98RT10]

I have built a footwell sub for my RT/10 last year and one of my (similar) challenges was to pick the right (or best) driver for the small volume I could make available. After I measured the dimensons in my footwell, I concluded that my enclosure would be limited to 10 liters net. Based on basic subwoofer enclosure calculation theory, it was clear, that it was not enough for even a 10" driver to produce real bass. So, I went checking the market for an 8" driver that would deliver best bass performance from a 10 Liter enclosure (sealed). I checked most of the brands (JBL, Alpine, JL, Kicker, Dynaudio just to name a few) for their 8" drivers and their TS parameters, did calculations, simulations etc.

I finally came across a manufacturer I did not know before. However, this one is well known among the DIY home audio community: Wavecor. Their flagship 8" woofer is called SW223BD01. With this one, I was able to achieve a lower cut-off frequency of 44 Hz with a 10 liters enclosure. No other driver I had checked was going that low. They would all require bigger enclosures. This driver is of very high Quality also in terms of how it is manufactured, e.g. it has a cast aluminum basket, aluminum cone, 2" voice coil)

I am extremely happy with the Sound Quality. Of course, it is not earth shaking (cannot be) and I would not win a SPL contest but I was always focused on sound quality rather than sound pressure levels. I should mention though, that is does play loud (enough) but not to any extrem.

So, just in case someone is looking for a very good driver, he/she should consider this one as a potential candidate ;-)


http://i1359.photobucket.com/albums/q800/My98ViperRT10/Stereo/DSC_03592_zps6a06db69.jpg

http://i1359.photobucket.com/albums/q800/My98ViperRT10/Stereo/DSC_0595_zpscc8b1ac2.jpg

[RSBIII]

I am working on a similar setup- I currently have a Pioneer AVIC-N5 running with a decent amp, but I am unsure as to how to approach the subwoofer issue. Every thread I have found on someone attempting to run a setup based entirely on the center console, no matter how much work is put into it, seems to be pointless alone- and I am skeptical of the footwell setup as there is little room to spare, even without it. My next step is going to be to put in the speakers, and I originally wanted to go with the same focals as above, until I discovered the 165 KRX3 (http://www.focal.com/en/k2-power/181-165-krx3-3544053751320.html)

Does anyone have any input as to the fitment of the tweeters behind the seats?

[Redx]

Instead of doing footwell anyone ever think of using a underseat subwoofer such as this one?

http://www.focal.com/en/plug-play/250-ibus-21-3544059750129.html

Stock amp from what i could measure was just over 2.5" and this was 2.8" so it would be dam close

[Steve M]

Does anyone have any input as to the fitment of the tweeters behind the seats?

I ditched the rear tweeters when I redid mine...I think I still have them around if you'd like me to take some measurements/pictures.


Instead of doing footwell anyone ever think of using a underseat subwoofer such as this one?

http://www.focal.com/en/plug-play/250-ibus-21-3544059750129.html

Stock amp from what i could measure was just over 2.5" and this was 2.8" so it would be dam close

I'm just not sure there would be enough room - I was barely able to squeeze a Kenwood XR-5S amplifier under the passenger seat in mine to replace the factory amp, and it's only 2.2" tall. The driver's side in my '08 had a module under it (not sure if the '03-'06 cars have this too), so anything going under there would require a relocation of that plus the cutting of the brackets that hold it in place.

[Redx]

For sure, without pulling the seat almost impossible to tell. There's a ton of powered subs out there that would even fit in the footwell, or even behind the seat(haven't measured that, but at 2 3/4" you may lose a bit of room)

[TowDawg]

My JL250/1 is 2 5/16" tall and BARELY fits under the driver's seat. I mean barely, as in when I move the seat forward or back, it rubs the top of the amp.