Quentin Jarrell

I would call Jacob. He would be able to get you in the ball park of where you need to be. There's no telling he might recommend 10 spiders for extra deebeez. If anyone knows his product for spl it would be him.

I use Forest blades which are 300-400, but you can get a 120 tooth blade at home depot for like 40 bucks.

I use a 120t saw blade on a table saw

Two 12 L7 will not fit in that trunk with a proper box as they are technically closer to a 15.

Mark eldrige and Gary bigs both won numerous grand championships with kicker. The only way they sound like "poop" is due to user error.

This is because manucatures are finally getting qualified companies ie Harmon to set up their vehicles.

Same as LI's

Before you start hacking away on that door panel. Hook one of those tweeters up temperarely and set in the location where you might want it The are called super tweeters for a reason, IMO a compression tweeter should never be installed in a vehicle for daily listening.

Vance Dickason

A lollipop to the one who guesses the engineer that designed and co-owns the "inbox recone" patent.

Nevermind I guess they are dual one ohm

Sooooo, why not just buy another and put one sub on one amp one on the other.

That's correct, the coil will retain 100 percent flux for 10mm one way. then as is leaves the bottom plate (as the coil moves out) it loses flux. Once the coil moves from 10mm to roughly 25mm. there is roughly 70 percent of the coil length(L) saturated than at rest. On a side note, I don't pretend to know everything either nor will I intentially throw out a bunch of bullshit. This is the reason I have enlisted the help that I have, to ensure everything that I am invisioning is either executed correctly or changed due to my flawed thinking.

Now, here is the same exact motor but with a 95mm long coil. As you can see nearly the entire coil is saturated in flux giving us a BL of 69 and some change with a motor force factor of 2,833. Using tthe 70% bl xmax formula we get a xmax of roughly 25ish with a motor force factor of 1,388 at 25mm one way. This still leaves 15 mm of clearance to the back plate.

What you are looking at here is a 260mm bottom plate, 50mm thich 270mm OD magnets, then 260mm top plate, magnet, top plate. The top top plate and magnet is smaller because flux from the bottom magnet also flows through the botom top plate directly into the top top plate. Both top plates and top magnet is 25mm thick. Now, the 50mm tall coil sits directly in the middle of the two plates. So as it moves up or down is loses flux from one plate but gains flux from the other. Ideally you want the flux path equal on both plates so BL remains constant. So, the coil see the same amount of flux until the bottom of the coil meets the bottom of the very top, top plate. This means the BL remains 100% (ideally) constant until for 37.5mm ONE WAY. I am also using a very large gap in order to get the spl coil to fit. 1.25mm between the pole and coil, and 3mm between the coil and top plates. Even with this large gap I'm getting motor forces exceeding other overhung drivers do to the ability to concentrate flux. In order to get the same xmax on an overhung driver you would need a single top plate of around 50mm thick and a coil 125mm long and you would need a xmech of 90-100 to make sure the coil doesn't slap the back plate.

Although I am using a fairly heavy moving mass. Yes the overhung will be a no frills affordable daily beater for the youngens. Pretty much the same as others but running 50-100 bucks cheaper being they will only be sold direct thru me. The mmag once I have OSSD (oversized sd) baskets built next year, akind to the critical mass basket body and edge will be dealer direct.

The overhung is actually more inline with a FI BL. The BL rating I posted is on a dual one ohm coil with an Re of 1.7. So motor force is around 195 ish. And the xmax is overhung coil length. The actual 70% BL figure will be around 28-30. But I'll wait for Klippel results to post those. I'll post pics of the mmag FEA once I get to the hotel and you'll see the advantages of the mmag

I spied a nice little rf amp in there too

Both the subs use a 3 inch. I am no longer using Dan Wiggins technology, opted to go with Patrick Turnmire and Enrique Stiles' MMAG technology. Both who are regarded as two of the best engineers in the industry. Who in turn are also partners with Vance Dickason so in the future if I ever decide to build a nice little pair of components I will have avaliable to help with the crossover networks and such. All in all I have much more tool and experience by using these designers.

The overhung is well just an overhung motor. I'm still waiting on custom tooled 6 inch dustcaps. I guess I could post fea model pics of the mmag motor if it would be of interest.

I've got a normal overhung driver. Around 17.5 BL with 1.7 re coil, 22mm xmax that should be avaliable mid September and will be selling between 275 and 315 dependent on size 10-18 The first MMAG should be avaliable for Xmas. Very large motor with two coil options. The first a copper daily coil giving the sub a bl of 23.5 and a motor force factor of about 325. The second option is a pure aluminum coil for spl burps. Our modeling indecates a BL of 69 and a motor force factor of around 2,800. No that's not a typo I said BL of 69 and force factor of 2,800 for those who think they need a retarded amount of motor force. I have not yet received a sample yet on the MMAG so that info is purely based off several FEA programs which are normally pretty accurate.

Your best bet is to use test tunes at low- moderate lever. Start high work you way down. When the sub starts to unload (move like it's free aired) adjust the ssf a bit higher than that frequency And don't go by the numbers written on the amp. They could be anywheres up to 20 percent off.

Anyhow a driver should have more xmech than xsus to prevent sub failure in these rare cases of unloading.

I've never had a sub spontainiously combust under tuning either.

The first part of the book(last version) goes in simple detail of how to model a sub using SpeaD (one of the programs I use). Then he goes into grave detail on sealed, vented, bandpass, and t-lines.