DevilDriver

http://www.canadiancaraudio.com/online/270796-post14.html

In a clipping argument for the 300th time......

Quoted for truth. There's a weird dichotomy here: either they are brainless and own garbage, or they are brainless and just pay to have something. Not enough enthusiasts, unfortunately.

Scott, what are you going to see Sean for? Business, or pleasure? Not sure what I'll be buying in the next month, but I appreciate the offer and will be sure to take you up on that if the need should present itself.

Even though I hate paying duties and such on items coming across the border, the one thing I don't expect a company to cut me slack on is shipping.

Yup. Those MJ18's should be getting sold for $50 each, shipping included. Anything else is just a rip off. But if I buy 8, I should get them shipped for $25 each.

You should keep the warning system on for us. I'd like to give a good run at getting Scott banned.

Aaron, please send me 8 navigation units for $20. And maybe some curly fries, while you're at it.

Hey, when you're at home, you've got time for verbal diarrhea.

To expand on that for a moment... The tuning frequency is a function of it's cross sectional area, it's length, and the volume of the enclosure. The port is, in fact, another speaker, but in a different form. If you look at your typical speaker, it's mass on a spring that is driven by the an oscillating voice coil in a magnetic field. In a bass-reflex enclosure, the air in side the port is the mass, the air in the enclosure is the spring, and the speaker itself is the motor. The mass in the port can easily be excited at a resonant frequency, much like a speaker is at Fs (it's resonant frequency). This resonant frequency is the "tuning frequency". When it comes to the tuning frequency, you can make a few general assumptions: 1. Tune lower and you will net greater low end extension and sacrifice some upper frequency sensitivity. 2. Tune higher and you will net greater upper frequency sensitivity, but lose some low end extension. 3. Tuning lower requires a longer port, assuming the same cross sectional area of the port and net volume of the enclosure. 30-35 Hz is a common tuning frequency in vehicles because, with music, it serves for the best compromise between low end extension and upper frequency sensitivity. If this is something you're wanting to achieve, perhaps post what products you are using now and we could help determine the best net volume of the enclosure as well as the dimensions of the port. You might find playing with programs like WinISD or UniBox to be beneficial in your understanding of the concept.

Werd. I would love 8 18" Q's, but I have no reason for it in any room in the house. If (and when?) you do go this route, be sure to post some pics here. I don't get over to see the cult very much anymore.

I didn't think PE sold the woofer tester anymore, but I could be wrong. Google it, though, and you can find it. There's other ways of testing thiele/small parameters, but it's probably the easiest route for most users.

I could not feel worse today. It hurts to look at the computer and I am terribly nautious.

Ok, getting really long. Give me an hour, or two, or a day. You've been patient enough; what's one more day?

Order the BTL, with SPL, Pole Chamfer, and 3rd magnet options.

4 Cubes sealed, 7.5 Cubes ported tuned to 28-32 Hz. I have the old recommendations memorized still. If you want the actual thiele/small parameters, use www.webarchive.org

Albert Collins :thumbup:

1. I have no idea where that is 2. I assume you're speaking of Chernobyl 3. Russia has not been abandoned Chernobyl is in the Ukraine. Chernobyl is actually seeing a surprising regrowth; a lot of animals are moving back much earlier than expected.

Eric Clapton/Derek and the Dominos, Muddy Waters, Robert Johnson, Stevie Ray Vaughn, Gary Moore, Black Keys, North Missippi All Stars, BB King, Elmore James, Jimi Hendrix (had a really good all-blues album).

Tissue box will do nothing. Not enough mass. Mythbusters FTW! Exactly. Can't break Newton's laws. The acceleration required to build up any appreciable force with that mass is well beyond a vehicle's capabilities. Could scratch yourself, though. Watch out for those corners.

If you're just listening daily, the cooling option is fine. You probably won't hear that much of a difference with the machining. The BTL will be infinitely louder than the MX, no doubt about that. Whether it sounds good enough to you or not is a judgement call you'll have to make.

Quite the surround for such limited throw. Sd of, what, 10cm^2? Lol.

Seems a touch expensive, but would need to see more of them to know for sure.

Keep in mind there was only one sealed and one ported enclosure used for all testing.

On a similar note, I was reading an older CA&E edition (the one where Vance Dickason and Eric Holdaway review the W7) and Eric mentions Scott by name. I had never noiced that before. Let's see your ride and hopefully it's featured in the mag. Good luck!