Quentin Jarrell

Your very application is the ONLY reason to EVER use bandpass enclosure. This is a forum for audio enthusiasts, for people who enjoy not only their systems but who enjoy having knowledge about their systems. Your not going to see anyone here go in depth of why and when to use what type of enclosure because someone asks the same question every week. One of the most basic parts about a system is frequency responce. All it takes is basic knowledge which can be found from any number of sources (loudspeaker cookbook prime example) to understand this. This knowledge along with the ability to read a graph and it is very easy to see why not to use a bandpass enclosure when a ported enclosure will fit the application. Besides M5 explained why in one of his very firsts posts. You or the OP may not have understood his wording but again it was basic terms used in system design and all it would have took was 10 minutes on google and it would be clear why it's never better to use a bandpass enclosure in a wall over a ported enclosure for a daily system.

How do they know its allulminum? By the color? It could be pure copper and is just tinned to make it corrosive resistant.

It's for a buddy of mine. This isn't his first system by any means. Off the top of my head, over the past 10 years I've done: ~$5,000 re/jl system in a m3 6 15 c pillar wall in a range rover with 6 BL's ~ $25,000 full jl system with 3 13 w7's in new body style range rover with a ton of fiberglass work. Jl system in MB 55 AMG 2 Jl w7's and highs in a new Camero 4 kicker L7 15's in a new body style escalade. ~ $10,000 focal and IA system in a M5 And now this. Giving the fact the wall will be wrapped in carpet and its not really labor intensive we can say this one will be "on a budget"

Yes, almost all of metra's intergration pieces are junk.

I have no idea what you just said. The proper way to lift a truck is to have the ass end sit a few inches lower than the front to allow for better torque transfer to the ground.

Fuses are put in place to protect the vehicle from fires caused by wire failure. The most common failure is due to the wire not large enough for its use. The second is when the wire is somehow cut or pinched causing it to ground to the vehicle. So you first use the right size wire for the job Then fuse for the rating of the wire Most alternator wires are not fused due to the fact it is impossible for it to ground out to anything.

The birth sheets are Pemax. They do not account for capatance and reactance of the driver. They are tested with a resistor as their load. This is the reason why the CEA rating is lower than the birth sheet.

The Magnetar will bolt up to a 12 spoke basket and only has about 40mm of xmax so it'll work decently with oem parts.

That means you get a little taste first, let you get your feet wet, before you get your hands on full awsomeness. But from what you're saying, it'll be till the end of this year before this beast comes out, and its just January, THEN, that means the 120pound monster prob won't be out till 2017 The beast, lets dub it "Magnetar" due to the retarded amount of motor force, could be here in roughly 5 months. I have a sample of it coming with the Ethos order. Then another 2 1/2 to 3 months for production. As long as parts pricing holds steady it will be in the neighborhood of 500-550.

That means you get a little taste first, let you get your feet wet, before you get your hands on full awsomeness.

I have a ton of motors I'm getting samples for. A complete line up for each brand. DSS, which is direct only, will be a bargin banging on a budget brand using oem frames, softparts, and the same size motor for each size driver in their corresponding lines which will be based on xmax. The pinnacle line will start off with oem frames, ect. But will grow into Osd tabbed frames, custom soft parts, faraday rings, ect. Both brands will be targeted to excel in the lower octaves. The market is turning from the old school driver with high 30's f3 and letting cabin gain compensate for output, to drivers with very low f3's to get more of the "LOWS" emphasized. And I'll through in an unnecessary driver for marketing like the MMAG with a motor force factor of 3,000 or the Trident which will more than likely weigh 150 pounds. Below is another line which will be more useful to the everyday joe. It uses and 8 layer copper coil, 30mm pole vent, and massive amounts of chamfering to eliminate mechanical compression. Also just like this model all MMAG sub used for daily applications will have copper faraday rings throughout the entire stroke of the coil, all the way from the frame down to the back plate. They are shown in the below density model. Re 2.06 (series) SD .0491 m Fo 32.82 Qts .4686 Qes .5022 Qms 7 (estimated) Vas 23.01 L BL 17.19 T/M xmax 22.5 mm @ 10% THD (apprx. 30mm @ 70% BL) RMS 10.29 MMS 346.1 g Cms 68 uM/N spl 89.8 @ 2.83V PORTED ENCLOSURE 1.5 cubic feet Fb 29.6 hertz F3 26 hertz Pemax 1072 watts ripple 0 DB

The large BL you are thinking about is a different driver that is coming along with the Ethos order. It has a Motor force factor of nearly 3,000 (don't remember the exact number) You only need a certain amount of motor force to drive a particular moving mass. That figure is enough for the moving mass for this driver. It's basically the same as other higher end drivers with the same amount of moving mass but this driver has it spread over nearly 150mm versus only 20 or 30mm. To get this much xmax on a typical overhung motor would be physically impossible due to the massive amount coil mass it would take. And an underhung motor would not work either bc you would not be able to saturate a top plate thick enough to achieve linear BL.

Xmax is 82% BL or 10% harmonic distortion caused by the motor. The 70% BL is an estimate. Il know exactly when it's klippeled. I'm sure you'll drive it past 70% so you'll get the extra 5mm out of 70mm one way your looking for.

maximal nominal electrical input power "PEmax" which is defined as the power delivered by a low impedance source providing the effective voltage urms into a resistor having the same value as the voice coil resistance. In other words maximum power not accounting for the driver's impedance changes. This power rating is for that enclosure only. It just gives me a rough idea how large I need to make the coil.

No, the weight of a 4 inch coil outweighs its advantages. You need a certain amount of motor force to move the moving mass at different alignments. And there just isn't enough "L" increase to compensate for the weight increase.

I'm hoping to have it ready by then end of the year. I've got a lot of stuff brewing. It just depends on how everything falls into place.

I had to make the port big enough so I could crawl in and hook the wires up. It's 5 ply Baltic birch. I buy it from a wholesaler. It's not the cheap shit homedepot sells.

12's are most popular so they will come first. Ill have around 50 grand in tooling in each size driver. Everything from the surround down to the screws that hold the motor to the basket is being designed from scratch specifically for each sized driver.

I haven't calculated it but if I had to guesstimate I'd say 110-120 lbs for the motor.

The dust caps are 6" convex. The factory is having a hard time getting the lettering to come out right due to the high arc on the cap so we are still working on that. The lettering will be either embossed or engraved into the tooling.

15 enclosures have been added to the top. You can see the responses for both 12 and 15 are quite similar. This didn't happen by accident. Everyone now a days are itching for the "LOWS", so I designed these to excel in the mid 20's to mid 30's in reallitively small enclosures.

I'm working on a wall for 4 12's in my matrix. It just depends on when exactly they show up.

Added to top as requested. Also fixed the typo on the enclosures. (had red and green labels backwards)

Is this just for one sub or two? I'm under the impression it's for two subs

I've got a lot of interesting stuff on the way. This is going to be an exciting year for me.