DevilDriver

Ok, perhaps an alternative approach to this. Burn a CD with a fully clipped signal that has a fundamental frequency of whatever frequency you wish to low pass at. Connect an oscilloscope. Turn down the low pass filter until you see a perfectly round wave. Works like a charm.

Lots of people in the HOP last couple of days.

Which university are you going to? If I remember correctly, the U of C at Boulder is one of the 15 best public universities in the US. I'm currently attending the University of Regina with a major as an Electronic Systems Engineer. Most of my classes have been sporadic since I've been going part-time while working, but I'm attending full-time in January. Hopefully I can continue my good marks and use this as a spring-board towards a full scholarship at a different school, preferably in the US.

Ok, I had a lot to type and say that I'll try to get to tomorrow (got a little distracted listening to vinyl). But the long and short of it is that RMS Power ratings (which don't really exist in the sense that some believe they do) are essentially quite useless when listening to music. The eternal question is: "Can sub A handle amplifier B?" And the answer, realistically, is that you're the one who controls that. After all, it's your fingers on the volume knob, isn't it?

Working here. Some stylesheets (SubBlack for example) have the old link to chat in the header. This used to redirect you to the new address, but now it just comes up as a dead link.

Same rules apply, in general. They just apply in different ways. With a horn, for example, you generally limit low frequency extension if you keep the length of the throat short, and limit efficiency if you keep the mouth area small. You simply must build a large enclosure if you want to keep either of those two, which is why true horn enclosures are usually very big.

Wish we could get some more storm activity here. We're running short of warm fronts strong enough to get much condensation going in the stratosphere.

Don't start until the 4th. I miss school when I'm not there.

I made this analogy in a thread earlier.... A single speaker (no enclosure) is simply a diaphragm with mass on a spring that is driver by an electromechanical motor. The motor is obvious: the voice coil, it's interaction with the flux from the top plate, magnetic stack, backplate, and pole piece. The spring is the spider and surround. The diaphragm with mass is the diaphragm itself (plus the mass of the other moving parts). Now a bass-reflex enclosure behaves on the same kind of principle. The air inside the port is the mass, the air inside the enclosure is the spring, and the motor is the speaker itself. If you imagine this visually, it should be easier for you to understand the answer. The enclosure itself behaves as a low-pass filter. Just like any filter, it has a Q factor, resonance frequency, rate of rolloff, etc. It's the combination of Q factor and resonance frequency that is really the question here, as the rate of rolloff for most bass reflex enclosures is around 24dB/octave (4th order). By introducing two ports with different frequencies at which they resonate, you essentially end up with two different diaphragms with two different masses. Yes, this is in fact a LOT like putting two different speakers in the same enclosure and having them share airspace. It's not a particularly efficient use of the air spring. Note: An aperiodic bi-chamber (ABC) enclosure does work. Using the above analogy, can you explain why?

Looks beautiful. Exactly the type of place I would like to live.

Send an email to [email protected] titled OEM work. Worked for me if you don't get a response. Scott is good for checking the forums, but sometimes I think he's a bit busy.

Most people decide if things are the same by looking at the basket. Tsk, tsk. There's so much more to it than that. Keep the ball rolling, Jacob.

You should like the Q's a lot better than the P3's in every respect.

My dash is pretty much completed. It's built to be very flat from a-pillar to a-pillar with no erratic or uncontrollable reflections. I have some ensolite ready to apply but need to consider an aesthetically pleasing way of covering it. I have considered a few different materials.... Vinyl - I would love to wrap it in vinyl, but that would do nothing as far as taming reflections. Suede - Not bad for managing reflections and certain kinds are permeable, but good suede is expensive and looks like crap as soon as it's touched. Tweed - Permeable and manages reflections well, but ugly as all sin, in my opinion. Any thoughts on a good covering material?

In the house, it's more durable than vinyl. I'll give you that. But I enjoy vinyl for it's sonic qualities (whether they really exist or not) and the feel-good nostalgia you get. When I'm on the move, I'd rather carry music in digital form because I can store way, way more music for a given footprint. It's not that I necessarily have anything against CD's: I think for 99% of the people who listen to music, it's a tremendous format; we were lucky to stumble upon it. It just doesn't hold much value for me personally.

I replaced the important stuff with vinyl and have the rest as digital. I don't particularly care for the compact disc, to be honest.

Nick: Hope things are well. Ramos: Pictures........now Beat_Dominator: I got rid of my album collection about 5 years ago. I still have it all digitally, thank goodness. Scott: Not sure what you guys have for music stuff up there, but there should be lots of used places where you can get stuff really cheap. eBay is a good option as well, especially if you buy a bunch from the same seller. My hands are really aching from too much typing and I'm not sure I'll get much of a reprieve this weekend.

Budget?

Definitely. I actually have a dash in my truck right now that I glassed and painted, but it won't work too well for SQ competitions. Thanks to all who have contributed ideas so far.

Precision Econowind They sound quite interesting, Jacob. I look forward to hearing more.

I hate cats. Give me a dog any day of the week, but none of those little bitchy dogs: I like a dog that could kill me if it wanted to, but enjoys playing games instead.

Interior is kind of a greyish tan colour, but I intend to re-do it to match whatever colour(s) I end up going with on the dash. It's going to be dark colour, no matter what.

Aaron: Ouch for the Orioles today. Game 1 was a bit of a doozy.

IB it....ya know you want to. edit: Wow....that does look good!

Wow. Do you think he's married/still married?