///M5

Mornin'

I'm a Physicist and I tried to keep it short which doesn't allow for extrapolation required to make it simpler. Ask any of my friends what I do and I get a free laugh.

I want to measure the CA's as they go into breakup to see where it really is, but I don't feel like coating them in magnaflux.

Applications I could go on for hours on, but they almost all require a great deal of explanation to make sense so I will give you a sample. Measuring location dynamics. The biggest application for this is the tracking of read-write heads flying on hard drive discs. To give you an idea, you can't touch them and the "tone arm" of the hard drive has to be accurate to way better than 2nm, since that is the track spacing. (nm = 9 zeros). Structural dynamics and modal analysis. Basically the science of measuring where materials bend, how much, and to what stresses this will cause. We do this for any frequencies, thus the need for an FFT analyzer that goes from near DC to 30MHz. Where I live we don't do a whole lot of automotive, this is HUGE in Detroit but we do have a lot of critical devices and other structures. You can imagine that no one wants to design a part or device that resonates at frequencies it will regularly be exposed to. Of particular importance to: Aerospace, military, medical devices, recreational vehicles, and microstructure manufacturers--for instance like the MEMS airbag switch which is less than 250 microns in size (micron is 6 zeros). Acoustic measurements. I'll make this short. Basically if someone makes something that is loud and they don't want it to be, I will help them find out where and why it is loud. To use an example: say a motorcycle manufacturer was trying to pass an acoustics passby test with a new engine and muffler. The DOT says that they can only be 80dbA at 50ft during a WOT pass from 75' rolling start. If the manufacturer measures 84dBA they can't go to market and need to figure out how to reduce the overall volume by 4dBA. This may sound simple like putting on a different pipe, but believe me the last few dB of reduction to pass a test are rarely muffler noise related. The intake, intake resonator regularly dominate above 4500rpms for example. And pretty much whatever anyone else will pay me to do. I think Shanna states what I do better, "he is in the MN mafia" which is a much easier explanation.

TOP

Since you sort of asked: http://media.putfile.com/speaker-xlick That is an extremely quick "click" being played through an unsaid driver. The whole video is about 2.5 milliseconds played back really slow. This was the shortest, smallest file I could load. Warning it is still 16mb, it is not unusual to break 500mb.

Goodnight Ryan.

They are not going to enjoy that.

Now that's a remote even my woman can understand: Two buttons! Looks sweet, jealous my non-existent listening room is.

I do acoustic and vibration consulting work.

All the woofers you mentioned are over $300. The ampilfier power to run them, over $300 The enclosures built for them...depends on the wood. A RTA is much cheaper than a TL I have an RTA, Full Spectrum Analyzer, a Bruel & Kjaer mic, and access to a Laser Scanning Vibrometer whenever I want. You don't have to buy a dumb TL or RTA, just come here. I told thilo you had some fancy equipment avaliable to you but i forgot what it was. He sounded intrested Of course, best transient measurement device you can pretty much buy for testing speakers. Subs need it less though. If you think BL measurement devices have a real response it ain't nothin'.

TOP

That stupid /\ little roller stand is $549 so I said fvck that chit.

Since you asked earlier Jim, here is the grill stand I built today. It needs Polyurethane and some sanding, but is pretty much done. I don't get the grill until tomorrow or Friday so I haven't installed the bottom shelf yet since I am not sure how high to put it. It is just clamped on the ground to help hold everything square. This is the grill that is going in it:

1/2 mile??

Chit, 20 anytime 30 I have to wait for...

All the woofers you mentioned are over $300. The ampilfier power to run them, over $300 The enclosures built for them...depends on the wood. A RTA is much cheaper than a TL I have an RTA, Full Spectrum Analyzer, a Bruel & Kjaer mic, and access to a Laser Scanning Vibrometer whenever I want. You don't have to buy a dumb TL or RTA, just come here. Does your spectrum analyzer cover into RF as well? If so, it'd be worth it to go out there to get some meter time...do my own IMD and 3rd order intercept point measurements and tweak my gear... I can't afford the five-digit price tag that a lot of those things go for Most I can do is 30MHz.

Thanks, one is now on the way (hopefully anyway) from Sonic. I need a system in the truck; otherwise I drive the car

Yep, that only happens once. I had to screw the damn truck enclosure together since I had loaned out my gun to my bro. Since I was wanting to use it today, I went and extracted it from him.

I bet they are better than what most people run in their cars.

All the woofers you mentioned are over $300. The ampilfier power to run them, over $300 The enclosures built for them...depends on the wood. A RTA is much cheaper than a TL I have an RTA, Full Spectrum Analyzer, a Bruel & Kjaer mic, and access to a Laser Scanning Vibrometer whenever I want. You don't have to buy a dumb TL or RTA, just come here.

Or just drivers, but now we are talking.

yeah, its old. Still finny to PC users who have used macs and just about went crazy pretty much how i was feeling last time i tried to edit a video on a mac. Mac users will say that and even more about the stupid PC interface. Don't get me wrong, I have a PC but only because I have to. I would rather have a Mac. Yep, and the I have to is completely economic referring to upgrades and flexibility since I build my machines.

???? Except he is talking about PC's and not Macs. He isn't funny at all either.

I'd save the money on the rears and put it in the front/sub stage, either one is fine. You can always add rears later, just hook up the stock and fade away. If they are terrible, you will figure out how to switch them out quick.