Quentin Jarrell

Looks like I have to toggle between editing modes. Maybe Mark or Arron will know why.

The above parameters and charts are real world testing on the actual sample via a Klippel Analyzer. For modeling I use a few Programs. To figure what's needed for a particular driver I use SpeaD and Reverse SpeaD. For example with the Ethos 12" I wanted a sub with 30mm one way xmax that would work in a 2 cubic foot box tuned to 32 hertz with a 25-30 hertz f3. Reverse SpeaD will tell me the mechanical parameters along with the necessary motor force to achieve this. Then using that information I use SpeaD to design the motor. Once I have the motor parameters designed I use FEMM (2d magnetics modeler) to verify saturation and motor force, and heat saturation and flow with the help of Mathcad. Once that's done I use Infolytica's "Magnet" (3D software) to design things like motor cooling. This software allows you to input parameters of the softparts and power, ect to get a good idea how the motor will operate in the real world. When it comes to soft parts I use LoudSoft's FineCone, which I haven't applied yet. None of my custom softparts will be available till late this year.

Klippel results are in. I was able to get full small signal results. (ones used when building boxes). But was unable to get complete large signal parameters because their 5,000 watts RMS amp couldn't push it to XMECH. I'll have graphs and parameters up tonight.

1

Got a start on the box today looks like I will have just enough room for all the fiberglass panels. Amps will go in the back. Batteries will be mounted under the box. The fusing will be built into the fiberglass panel by the rear passenger door. (for some reason I can't hit enter to space down to the next line so pics In next post)

The first time you see someone beat another over the head with a brick for a bag of rice. Or see people dump out $5,000 barrels of vegetable oil onto the ground so they can use it to hold water you learn people in other countries have very different priorities.

We live in a capitalist market. It's the same for gas, eggs, milk, and bologna. It's worth what people are willing to pay for it.

PAC also makes an aftermarket Bluetooth that hooks up to any factory or aftermarket headunit. You could spice the phone to the speaker and mic wires on it and still be able to Bluetooth your phone.

All u got to do is wire the phone's speaker and mic wires to the iPhone earpiece input. http://www.amazon.com/gp/aw/d/B0046EDK30

Your gonna want more lenses. Your gonna get in a situation with a walk around lense where you want to zoom in on something 50 feet away and you are going to run out of lense. Just like M5 said ur not gonna gain much in quality with a few mega pixels. It's all. In the lenses. You can see in a few of the pics especially the bird in the grassy water is a bit pixelated. That pic was taken with a 50-250m lense (50meters to250meter zoom) and I still ran out of zoom. That bird was only about 50 feet from me.

These were taken with a D3100 last week. Click the photos to expand.

Get the 5500 and spend the extra money left over on lenses. You'll never see the quality difference between the Nikon and Cannon. However I personally like the The feel of the Nikon in my hands it's more comfortable and doesn't feel as cheap. If your not concerned about bracketing I'd even step down to the 3200 and spend even more money on lenses.

Need to gain 10lbs

Best HOG HEAD cheese warmer ever!

Or your tail lights have a negative turn on and you have something pinching it making it ground out when you take off.

I don't know how the brake lights work on your car but every car I've worked on the brake lights are independant from the brakes. Do you have an aftermarket alarm? Maybe Maybe the shock sensor or such is is malfunctioning making the lights come on during acceleration. Or maybe the switch is at the break pedal is broken or needs to be adjusted. un screw it from its mount and shake it and see if your llights come on.

I dont have plans for a pure spl sub, there just isn't a large enough market. However every MMAG motor will have the option of using a long coil to turn it into an over hung motor. For example I have a MMAG motor coming that when used as intended it's got a motor force factor of around 600. But with the use of the big 8 layer 100mm long winding it has a motor force factor over 3,000. Fs should not be an indicator of how low the sub will play. Especially when looking at small signal t/s numbers, your typical big sub on the market with a foam suround that has a Fs of 35hertz will in fact have a Fs of mid to high 20's with in it's working range.

...after all you are the ones who will be buying them. These frames will be used for subwoofers with an xmax of 30mm or larger and will handle massive motors. One of the motors samples I have coming is pushing 100lbs. They will be Osd (oversized sd) to allow for massive xmax and retain sd. After all what's the point if high excursion 12 if you have the sd of an 8. The below sketches are of what the frames might look like (have to do a few mods for added features. This frame has and OD of 12.5 inches and will allow a surround of 2.75 inches wide and still keep the same amount of sd as typical cones being used on current 12 spoked bakets. It has enough clearance for 90mm of one way xmax plus another 60% of clearance between xmax and xmech to assure no bottoming out. Its spider landing is large enough to handle a 11.25 inch spider. What I need from you are ideas you have always wanted on a sub but no one offers. For example these frames will use 1/0 wire connectors (with adaptors for smaller wire) and will have connectors for the option of a thermocouple built into motors to monitor coil temperature while in operation.

simple to do really however, a sub that size would be massive in weight. You need a ton of motor force to control a sub with a moving mass of 4-5 pounds moving 3 inches one way 50 times a second. So, packaging would be excessive as well, including a wooden baffle that the sub would be attached to. similar to a JL w7's packaging. So you'd just use that as a templete.

standard OD sizes, but remember they are oversized cones so on the lower xmax sub's 30-35mm excursion you are looking at roughly 25% more cone area compared to conventional set-ups. If I eventually get into anything over 18" they will be oval shaped to stay under the window line of vehicles.

One coil I've got coming from Precision Econowind is and 8 layer aluminum coil with 100mm long winding width. Although its the largest coil they have built for a sub they estimate it'll handle well over 100,000 watt test tone burst. It is excessive for 99.9999 of use but I'd rather have the option there since time and money has to spent in tooling a custom connector to fit the frame anyway. It'll have adaptors like distrobution blocks do to allow the use of smaller wire. I am using FINEcone (fea program from LoudSoft) to design the soft parts to make sure they will be able to handle the xmax correctly. Once I have the soft parts made then we will do a rapid prototype of the frames to ensure no modifications will be needed.

Not at all it's only a few hundred bucks to tool connectors. And thermocouples are extreamely cheap to manufacture, only a few bucks.

Basic math using ohms law. current = square root of watts/ohms so for 10,000 watts at one ohm you're looking at 100 amps. There are competitiors running 10's of thousands of watts. The maximum AWG current loads can be googled for different wire sizes. A thermocouple can be helpfull for people running more than recommended power, i.e. competitors. Heat causes the glues on coils to loosen causing the magnet wire to unwind. If you know the temp of the coil then you will know if it is safely handling the power being put to it.

I can reach Alaska. And on clear nights I can hear a little Russian. I'm in south east Louisiana. I only get in it late at night. My closesst neighbor is about a mile away and it disrupts his direct Tv reception. It'll make the fluorescent bulbs in the house glow a little too.

I've got a Galaxy Saturn at the house on a 4,500 watt linear with a Maco antenna on a 75 foot electric pole.