someone plays with his soldering iron too much

Make that yourself?
Out of curiosity... you wouldn't happen to know how to make a set of these for an old pair of Klipsch LaScala's from like 1977, would you? My dad's got a pair of those, and he needs new crossovers for them...

doing it REALLY right is a bit of an involved process that involves taking electrical and acoustic measurements of each of the individual drivers and then calculating the optimal components to achieve the best transfer function.

OR, if you have the old crossovers and they're just rotted/fried/busted, you should be able to just copy the design if all the components have their values written on them. If they don't, you'll probably need some kind of original schematic, which is probably very difficult to find.

A great resource: http://www.diyaudio.com

Also, to answer your original question: yup! These, and the speakers they go in, are entirely designed and built by me! (Check my gallery for other pictures of the "Thesis" set)

Unfortunately, he doesn't have the original crossovers. I've found a place where you can buy them, but it's like $400 for a pair. He got them when he was in college, and had to buy a separate piece of stereo equipment. They worked for a long time, but now they crackle and pop horribly if you try to use them. Funny thing is, both the crossover unit and the speakers have been tested, and they're all fine on their own.

I'm in my senior year of college, studying electrical engineering... so i should theoretically know how to do all that stuff you said (at least I know what you were talking about). It'd be neat if I could make the crossovers myself for him. Those are pretty common (older) speakers. I'll have to look around and see if I can find a schematic for one that works for a 'standard' response range of those particular speakers.

yeah, you can always go with a basic design, but the biggest trick is that the circuits are all relative to the impedance of the driver, and the impedance of the driver is relative to frequency. So, going with basic designs that don't take that into account can give you spikes in your response that might not do the drivers justice.

Fortunately measuring driver impedance is not THE most difficult thing to do, and can be done with a home made cable or two, a decent computer sound card, and some free software: http://www.speakerworkshop.com/

it pleases me to see that doing this kind of stuff isent a lost art.

*stares and drools*
heh making a hardcore speaker ehh. well might i suggest for your next project to make a plasma speaker

http://www.instructables.com/id/Bui.....lasma_Speaker/

aaahahaha holy shit, this is awesome.

If the parts aren't too expensive I might have to build one and then take some measurements :D

basicly all you need to know how to do is convert the transformer for a tesla coil plasma ball to react to sound input and such. lots of amplification from what i can easily tell.