mr mikey

Sorry, I totally went off-topic on that one. I do agree heavily with your 2nd part, my younger days consisted of sheets of plywood glued together for flex resistance and 1"x1" boards for corner braces....of course, those were the days of the externally shafted Strokers and stuff. Those were the good ole days.

Most of the people in the local economy don't care about distortion, they just want decibels(or massive BOOM as they call it). But to be honest, it won't be distorted 100% of the time, but I wanted to make sure that when it did distort, it didn't crash during the distortion phaze. Like when a bit of dirty bass is fed into it during one of the many crappy rap songs that I'm sure will be asked to be played to demo them. I have a sound room, but alot of people are let down after they realize "that room was alot louder than my car!!!" So I got a few old clunkers and shot 'em with a paint gun and put them inside the shop to show off sound systems. Tried to get 1 of each cab style: hatchback, single cab, ext cab(personal vehicle), sedan, & suv. Then one weekend a month, I have certain systems demo'd in each of the cars to show the difference in audible sounds and also in the 'felt' sounds so people will be able to get an idea of how their vehicle will sound. I know that's going the extra mile, but I actually hate for people not to be completely satisfied. Leaving with a smile is much better than a :S face....more times than not, they've returned with friends. ^.^

Oh I see, so the BP increases the cooling so you can run more wattage and keep the same temp at the higher wattage that the BP-less wattage would be running at. Nice upgrade there. When you said the "High xmax", were you referring to the "flatwind coil" or an actual "xmax" upgrade? Oh nevermind, I see where you said it increases the wind height of the coil, so in turn, yes that actually increases the xmax. Thanks.

Thanks for the calculations Julian, but let me be a tad more specific. Port opening size = square inches(i now know the required size, ty)....port depth = how far the channel of the port goes into box(i still need to know this....would this be considered the volume of the port?)....also, I know different subs recommend different shaped ports, anyone know the recommended port for the ssd18? circle/square/slotted/etc.

I'll eventually get the BTL's, but a local competitor is bringing in more business with a system that I know can be beat without spending the money he did. He's advertising that he can make your vehicle sound just as loud for a mere $2150. Well, according to the db calculations on rockford's site and fi's site, the rf's he's using do not produce as much db's as the ssd's do. So I was planning on using the ssd's to out-perform him in db's, and then pretty much say "you can get louder than him for under $1000". Now of course customers like to see the excursion runs, but they also turn tail and run if they hear any type of chatter/rattle coming from the subs, so was just wondering the limit to get an idea of actual movement. "Stick your head in the window. Your hair's blowing everywhere!!!" That brings back memories of cerwin vega's I know he's running the P3 15's in the max sized ported enclosure, with twin RF1000.1's.

Guess I'll add to his question and ask if the flatwind increases the linear size of coil(greater xmax), the thickness of coil, or what? That's about only thing that bothers me, except the BP option. What actually happens during the BP upgrade?(increased cooling? rms increase i do know, but what physically gets changed?)

For instance, the xmax is the farthest it will move in 1 direction before distorting. The xlim is the farthest it will move while distorting. Usually the excursion is either stopped by the excursion limiters(whether it be the spiders or the limiting-ties), or on older/cheaper subs it's stopped when the coil bottoms out(or in rare cases the coil jumping off the pole). Some subs have a small xmax whilst having a giant xlim, so that you can option to drive them hard(move alot of cone area) without the coils crashing. The bad thing about spiders limiting the travel is when you have the embedded tensil leads, it can cause unnecessary strain on them during excessive cone travel(excursion). I just found a site showing how xmax and xlim are defined, you can take a look if you want to know what I'm referring to. http://www.subwoofer-builder.com/xmax.htm

Hey, is there any way that a template can be made of the gears sticker and the bomb sticker on website? I'm interested in getting a stencil of both and getting them airbrushed onto the hood(gear logo on driver's side and bomb logo on pass. side). This isn't a big rush or anything, but if you know someone who can do that, maybe forward me on to them? I'm looking at enlarging the bomb scale to the length of about 28" so when the front end tilts forward it'll show up like a billboard. Thanks again.

After first seeing the specs on the website, I noticed there are a few necessary specs not included. #1: I noticed the xmax, but nowhere did I see the xlim. #2: Recommended type of port(s)? (shape/size/depth) If I list the specs of my vehicle, maybe someone can get an idea and throw me some info. If any other info is needed, just ask. 1995 GMC Sierra LT ext cab 6.5ft bed. Rear seat bottom and back will be removed. .75" MDF enclosure with internal dimensions of 45"W x 30"H x 25"D. Subs will be up-firing. Should ports be front, rear, up or side firing? Where should the ports be located in terms of speaker location, between subs, at corners, etc? I will be aiming for 32.5Hz, so any experience in that frequency range with these subs would be greatly appreciated. They will be ran at 1200watts with BP Power upgrade. I am having an old PA-1000 rebuilt at a local vocational school with all new boards/parts(just using the old lexan case cuz of it's looks/internal lighting) to run these 2 subs. I'm told they can make the amp stable at .74ohms outputting ~3.8k watts RMS, if it turns out to be a success, then atleast the amp won't be run hard. 0ga wire, Stinger 50farad cell, 2x Optima red tops, twin 200amp alts(small pulleys), and digital meters to keep an eye on usage. Can't think of any other info that may be needed at the moment. Thanks for any input, Mike.

A few of the teams at the 'thunder on the water' competition mentioned this forum.