Everything posted by Quentin Jarrell
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How good are SHURiKEN batteries?
They are good batteries. I run them as well. The are cheaper than most because they are owned by Metra and can take advantage of cheaper manufacturing coat due to their high volume.
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Looking for ouput from 1.75ft^3
If you do one ten you will gave no problem porting it
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Looking for ouput from 1.75ft^3
I have done 2 12" IA 187s downfired in that truck by raising the seat about .75 of an inch with washers
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Need some help
Bodybuilding.com has tons of info for first timers
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Need some help
The easiest way to reduce weight would be to place you feet on a chair that is not directly under you.
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The install....is how much percent now?
Those boxes to the left are amps
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Need some help
That is retarded, their "incline pullup" is a row, that works a completely different muscle group
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An update on what's going on with our subwoofers
Sure, motor is set in stone, however suspension compliances might changer ever so slightly as we are still working on a structurely sufficient aluminum cone and adding spacers between the spiders to help rocking due to the high coil and cone mass. But these are a good baseline. Parameter Value Fs 36.8 Hz Qts 0.225 Vas 42.2 Liters SPLw 91.45 dB @ 1W, 1m SPLv 94.94 dB @ 2.83Vrms, 1m Qms 10.82 Qes 0.230 Re 3.58 Ohms Le 1.385 mH BL 36.70 N/A Mms 374.39 grams Cms 0.050 mm/N Sd 780.0 cm2 Xmag 28.14 mm linear each direction at 82% peak BL Xmech 56.00 mm rearward Vd 4.3902 liters Z @ 1 kHz 12.3 Ohms Le Rolloff 411.4 Hz BL2/Re 376.18 BL/Mms 0.10 Fs/Qts 163.32 EBP 159.9
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An update on what's going on with our subwoofers
Got a little update today on the Divine series of woofers today. (still waiting on spiders for our sq line) I don't think I stated before but the motor force factor is 376.18 BL^2/Re For the thermal rating, given it's a big 4" voice coil with aluminum former (big .9mm diameter windings- 19 AWG), and being we are using an aluminum cone we should have 2000W power handling and 10KW burst capability. I know 2000W sounds weak but this is due to the HIGH linear BL across it's stroke.(If this was a typical overhung motor it would need 3400w to achieve the same stroke. This is similar to the low RMS rating on the Brahma back in the day). This is a rating to XMAX NOT THERMAL. For the 15 you will want a 4 cubic foot enclsoure tuned to 35 hertz for a massive groundpounder( should handle 3,000 watts form 16 hertz on up). For a burp box around 8 cubic feet tuned to 55-60 hertz.(should handle 20KW both mechanically and thermally for a 3-5 second burp. 12" enclsoures will run around 25% smaller in volume.
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System for my Hyundai - Sundown,JL Audio, Crescendo, Audiocontrol, DEI
If you are using an epoxy resin it is going to depend on the type of hardener you have. They can range from 4:1 to 1:1 ratios. Epoxy resin produces a "prettier" layup and is normally used in vacuuming applications. Polyester is a cheaper material and is most commonly used. I use polyester on nearly everything and it runs me $100 per 5 gallons. The epoxy resin I use for carbonfibre and Kevlar accent pieces and it runs me about $80 per gallon with hardener.
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System for my Hyundai - Sundown,JL Audio, Crescendo, Audiocontrol, DEI
You want to use 1.5 to 2 percent mekp to resin
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System for my Hyundai - Sundown,JL Audio, Crescendo, Audiocontrol, DEI
You want to use a 100 percent polyester material. For some reason polyester resin does not harden as well on cotten. Most "car audio" stretching material is Alpine fleece. I use fleece from hobby lobby. At 3 bucks a yard off the discount rack you can get cheap.
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Future truck plans
A lid(cover) for your bed, cut a hole in your bed and cab and have the system fire in to the bed. Also called a blow through. Much easier and more effective than what you are trying to do and you keep your whole back seat.
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Future truck plans
buy a lid and cut the wall.
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Sealed Enclosure for 15" Driver
Paypal, but let me get a sketchup and final price with shipping for you
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Sealed Enclosure for 15" Driver
You could go with birch. It would add $15 to the order. I can ship it through FedEx but it must be under 70 pounds. If we make from burch it'll be 50-60 pounds
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Sealed Enclosure for 15" Driver
The enclosure will be too heavy to send directly to your APO. If you have a FedEx location near you I can have it sent there and you can pick it up.
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Sealed Enclosure for 15" Driver
The enclosure will be $125 with full internal bracing and the flushed termial posts I do. I will have to call FedEx to get a rate to an APO but if you are on the west coast shipping sould be $50-$75
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Sealed Enclosure for 15" Driver
max deminsions? how would you like it wrapped? do you want a flushe baffle?
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From: Dual 12" Enclosure for Two SSA Dcon's
This is something I do not put up with in MY section. If you wish to pull business from me do so in an open forum section or through PM's this is not the place for it. OP Do you need a flushed baffel ? What is your maw demensions How would you like it wrapped?
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4 SA-15/SAZ3500d Walled GMC Sierra
if you have 15 cubes then it needs to be 17" long to be 25 hertz. That is a really small port though.
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An update on what's going on with our subwoofers
Here's a few FEA graphs A cut a way of the motor A pic of the flux field. The flux gap is nearly 3 inches wide A pic of the BL curve. BL is still above 95 percent all the way to 20" one way. This is why xbl topolgy os so energy efficient. This driver should need only 60% of its competition's power to achieve the same output.
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An update on what's going on with our subwoofers
Pics will be up for the Genisis shortly. I have all parts in besides the spiders. I expect at least a month before I get the motors for the Divine from China.
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An update on what's going on with our subwoofers
We have been working on a middle line of drivers that will be called the Genisis series for a while now. The will come in 10, 12, and 15 inch sizes. These are xbl drivers and will be assembled in the US with US softparts aside form the spiders which are from an American company but are produced in Mexico with American textiles. All we are waiting on now are the spiders and final testing. We should have a preorder starting within the next month or so for around $175-$200 shipped. We also have a HIGH BL HIGH output line that is still in the design stage, which if it turn out in the real world as it does on paper will be called the Divine series. We all know the Adire Brahma was one of if not the best high output SQ drives of its time. If the Brahma Extreme was the Brahma's daddy the Divine will be its grand-daddy. They will be offered in a 12" and 15" version and a 18" version later on if need be. The following are a few projected specs. motor alone will weigh 96 pounds 44mm thich top plate 11" diameter magnet 2" thich (that's 1/8 inch smaller than the 12" driver cutout) BL 36.7 xmax @ 70% BL is around 32 mm one way. (BL at 70% is 25.6 which is what most high output drivers have at rest) 3.9 inch coil former with a coil OD of 4.4 inches motor reaward clearance of 56 mm but will be limited to 44mm frame clearance two copper shorting ring to keep induction down to 1.385 mH THIS WILL NOT BE A FART CANNON. IT WILL SOUND GREAT ON MUSIC. projected RMS rating, don't know yet but we will have videos up trying to break them.
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Fun little "SQ" project I'm starting today
I smell an underhung motor with a copper sleeve on the polepiece