BillFitzmaurice.info

Hey guys...very excited about my current AutoTuba build....Started on Saturday and am about 1/2 done. I am going to start off using it in my Home theater, but it will certainly end up in my truck. Box will measure about 24" wide and will contain two JBL eights.....I also have an new Earthquake 10" with decent specs but the Qts are a little high (.7 vs the suggested .3-.5). Just curious if anyone would know the impact of using a sub with high Qts.....
Subwoofer Specifications
Subwoofer Series DB
Subwoofer Size 10"
Peak Power Handling 800 watts
RMS Power Handling 350 watts
Voice Coil(s) Single
Impedance (Per Voice Coil) 4 ohms
Voice Coil Diameter 2"
Frequency Response 26 - 1,300 Hz
Sensitivity 87 dB
Xmax (millimeters) 19.05 mm
Subwoofer Design Round / Circle
Main Cone Color Black
Woofer Composition Pressed Pulp Fiber
Woofer Surround Santoprene Rubber
Subwoofer Grille No
Re-Cone Kit Available No
Recommended Enclosure Specifications
Recommended Enclosure Type Ported / Vented
Sealed
Minimum Sealed Box Volume 0.6 cubic feet
Maximum Sealed Box Volume 1.25 cubic feet
Minimum Ported Box Volume 0.6 cubic feet
Maximum Ported Box Volume 1.25 cubic feet
Top-Mount Depth 4-/78"
Cutout Diameter 9-3/16"
Shallow Mount Installation No
Electromechanical Parameters
Equivalent Compliance (Vas) 30.5 liters
Total Speaker Q Value (Qts) 0.70
Electrical Q Value (Qes) 0.76
Mechanical Q Value (Qms) 8.35

Nice clean looking work and dado joints. Are you using PL in there? I don't see any squeezeout.

lowsound

iamlowsound wrote:Nice clean looking work and dado joints. Are you using PL in there? I don't see any squeezeout.

lowsound

Looks like a dry fit to me on that picture.

Yep, dry fit.....finished all the panels today. will dry fit one more time tomorrow and then start gluing 'er up.... I'm going to test it against my BIC America F12 and we'll see how the two eights compare.

roadie wrote: Just curious if anyone would know the impact of using a sub with high Qts.....

High Q and horns don't mix.

Thanks for the info Bill....JBL Eights it is then. Hopefully by the end of the week I'll post some feedback.....Kev.

Those look to be MDF panels. Ouch - that is going to be no fun to move! Good looking build though!

Hold up here guys, we're getting away from the point here which is that Skyline in the background... Pics please!

Ahhhhh....I was wondering if anyone would notice! Yes, the love of my life.....engine pic is not real recent. A few more changes since (gt4094r turbo etc.) about 800hp currently. Painted myself in my garage (very pleased with how she turned out)....
NOTE.....AutoTuba will not go in this car, can't afford that much weight!

Yep awesome car that......



PulseMan

make your AT out of italian poplar in 3/8, then you can afford the weight lol.

About 800hp? Yikes. Awesome car man, colour me jealous.

Nice ride, i'm guessing that the engine is all the sound it needs

Thanks...3" straight pipe is plenty loud, no need for a sound system.
Finished my box last night, with the exception of the bottom brace. Some pics and a review to follow..



The Plexi-glass was a bit of a bitch to cut, but it took a tap just fine. Paint and finishing next!

roadie wrote:Ahhhhh....I was wondering if anyone would notice! Yes, the love of my life.....engine pic is not real recent. A few more changes since (gt4094r turbo etc.) about 800hp currently. Painted myself in my garage (very pleased with how she turned out)....
NOTE.....AutoTuba will not go in this car, can't afford that much weight!

Holy GT40'd RB26, Batman. Do I spy an older Land Cruiser in that pic as well?