USNRET Posted October 14, 2014 Author Share Posted October 14, 2014 The system thoughts so far: Kenwood DPX500BT Front door / A pillar speakers either Focal ISS 165 two way 5-70 watts RMS power range (140 watts peak) frequency response: 60-20,000 Hz sensitivity: 92.6 dB or 165AS3 three way in the front door / A pillar 2-80 watts RMS power range (160 watts peak) frequency response: 55-20,000 Hz sensitivity: 90 dB Focal 100CA1SG two way in the rear doors 2-40 watts RMS power range (80 watts peak) 4-ohm impedance frequency response: 90-20,000 Hz sensitivity: 89 dB Amps: Focal FPP4100 for the mains and FPP1000 for the sub Sub Focal 27V1 11" 4-ohm subwoofer Polyglass cone with butyl rubber surround zamak (zinc alloy) basket power range: 50-250 watts RMS peak power handling: 500 watts frequency response: 34-500 Hz sensitivity: 85.8 dB top-mount depth: 5-1/8" ported box volume: 0.53-1.06 cubic fee What effect does the box size play here as the recommendation doubles? Smaller does what? Larger? I'll have to measure the available space under the seat. Quote Link to comment Share on other sites More sharing options...
jason str Posted October 14, 2014 Share Posted October 14, 2014 I would focus my money on the front of the cabin, this is where you want your soundstage. Maybe some midbass drivers in the rear. Or if the rear is important to you get matching speakers for the rear. Don't buy without listening first, big $$$ does not always relate to better sound. A 10" driver in a Auto Tuba would be an ideal low distortion sub to fill in the low notes. 2 Quote Link to comment Share on other sites More sharing options...
USNRET Posted October 14, 2014 Author Share Posted October 14, 2014 (edited) A 10" driver in a Auto Tuba would be an ideal low distortion sub to fill in the low notes. Don't see any ready designs that would fit under my rear seat; a must have. Don't buy without listening first, big $$$ does not always relate to better sound. I've been asking but haven't found anything to listen to that is installed. I don't think the store sound room means anything. Edited October 14, 2014 by USNRET Quote Link to comment Share on other sites More sharing options...
USNRET Posted October 14, 2014 Author Share Posted October 14, 2014 Under one side is trapezoid shaped that I can put a 20" long x 10" deep box with a 9" front x 7" rear outside dimensions Quote Link to comment Share on other sites More sharing options...
jason str Posted October 14, 2014 Share Posted October 14, 2014 A 10" driver in a Auto Tuba would be an ideal low distortion sub to fill in the low notes. Don't see any ready designs that would fit under my rear seat; a must have. Looks like you're stuck having a custom cabinet built or one that fits in the available space then. Don't buy without listening first, big $$$ does not always relate to better sound. I've been asking but haven't found anything to listen to that is installed. I don't think the store sound room means anything. Just go with matching components for best results. Quote Link to comment Share on other sites More sharing options...
angusruler Posted October 14, 2014 Share Posted October 14, 2014 this site might help: http://www.carstereo.com/help/Articles.cfm?id=5 Quote Link to comment Share on other sites More sharing options...
The Dude Posted October 14, 2014 Share Posted October 14, 2014 Anybody ever tried Bill's autotuba or truck tuba. http://www.billfitzmaurice.com/AutoTruckTuba.html Quote Link to comment Share on other sites More sharing options...
jason str Posted October 15, 2014 Share Posted October 15, 2014 Heard an Auto Tuba at a local car show earlier this year, it was a single 8. I thought it sounded great and more output than expected. Have not heard the Truck Tuba as of yet nor have i heard of anybody building one but they are probably some out there. Quote Link to comment Share on other sites More sharing options...
hydro_pyro Posted October 15, 2014 Share Posted October 15, 2014 When I was a young 20-something, I had a Chrysler LeBaron convertible. The only thing that could overcome the lack of interior acoustics was a sealed triple-10" box in the trunk. I ran a Japan-built 300w Pioneer amp into three custom JL's with 12-ohm coils in parallel. That did the trick. Quote Link to comment Share on other sites More sharing options...
japosey Posted October 15, 2014 Share Posted October 15, 2014 You can have great performance out of sealed and ported. You will tend to find that pre-fab enclosures are typically tuned to 36-40hz, therefore, they will typically play louder than a sealed enclosure. I prefer to tune my ported boxes to no more than 32hz and have tuned them as low as 27hz. Sealed boxes obviously play lower and are more cleaner and more accurate at the lower frequencies. I currently have two 10" Image Dynamic ID10 subs in a sealed enclosure in one truck and a single JL 10W3 in a ported box in another truck. They definitely sound different and I would say the single 10 in the ported box is just as loud as the two in the sealed box. Both systems sound great! Just a little different. Quote Link to comment Share on other sites More sharing options...
Quiet_Hollow Posted October 15, 2014 Share Posted October 15, 2014 (edited) Anybody ever tried Bill's autotuba or truck tuba. Sure have. My car: Same setup, but recorded with a Galaxy S4 instead of the GL-1: Her car: Edited October 15, 2014 by Quiet_Hollow Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted October 15, 2014 Share Posted October 15, 2014 What effect does the box size play here as the recommendation doubles? Smaller does what? Larger? Typically efficiency increases with an increase in box size. Quote Link to comment Share on other sites More sharing options...
USNRET Posted October 15, 2014 Author Share Posted October 15, 2014 What effect does the box size play here as the recommendation doubles? Smaller does what? Larger? Typically efficiency increases with an increase in box size. and then what "tunes" the sub? I assume that enclosure size and port diameter / length changes response? Attached info on shop recommended sub from Focalfiche-technique-27v1.pdf Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted October 15, 2014 Share Posted October 15, 2014 and then what "tunes" the sub? Yes, port volume determines tune. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted October 15, 2014 Share Posted October 15, 2014 You'll also notice that the larger boxes are tuned lower than the smaller boxes. Quote Link to comment Share on other sites More sharing options...
angusruler Posted October 17, 2014 Share Posted October 17, 2014 A 10" driver in a Auto Tuba would be an ideal low distortion sub to fill in the low notes.Don't see any ready designs that would fit under my rear seat; a must have. Don't buy without listening first, big $$$ does not always relate to better sound. I've been asking but haven't found anything to listen to that is installed. I don't think the store sound room means anything. have you checked out the jl audio website? they have pre made fiberglass enclosures for specific vehicles that supposedly sound fantastic. 1 Quote Link to comment Share on other sites More sharing options...
mustang guy Posted October 17, 2014 Share Posted October 17, 2014 (edited) I like JL too. BTW, Crutchfield has lots of subs specific for your truck. I still have an old 94 Sierra I bought new. It has a JL stealthbox sub under the passenger side rear seat. It is a 10" and sounds great. Edited October 17, 2014 by mustang guy 2 Quote Link to comment Share on other sites More sharing options...
vnzbd Posted October 17, 2014 Share Posted October 17, 2014 JL Audio works for me. I drive a gen 2 Scion Xb with subs under the front seats. I run 6W3v3-4 in a JL recomended sealed enclosure of .15 cubic' and F3 of 34hz. I run an Alpine amp speced at 350wpc mono. Clean, tight and tactile. And with them located up front the bass does not was out with the windows down. It won't compete with the mega watt, high displacement setups but it does provide a very balanced system. I run the JL 6.5 C3 system up front at 100 wpc. Sweet to me! Quote Link to comment Share on other sites More sharing options...
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