AE TD12x SEOS12 Build!!!! - Page 4

I think I need to work on my reading comprehension.

Your speakers are looking good and I'm sure you're going to love the sound.

-Max

Geez man, that comparison reminds me of comparing your XXX to most other 18's...

Your XO's got some real cojones bro...

Looking forward to the end result!

Man ^this is some gorgeous work. I'm a little green with respect to crossover assembly but any idea why they used solid copper coated in some areas and stranded speaker wire in others? I'm not nitpicking at all, I'm asking b/c I intended to use solid copper to bridge some of the point to points on my crossover and wondered if there is a difference?

I'm gonna be lobbying hard for a demo once these babies are done bro, so hurry up every chance you get

^ From what I've seen/read it seems common to use solid copper as a common ground for most (or all) of the components.

Beast - I see the caps are held in place by zip ties. Are the other components glued in? If so, they did a great job at concealing the glue.

Yes whoever put those crossovers together did a very nice job

Indeed, very nicely done. Beast, pardon me, would you have any Grey Poupon with your Jantzen's? Dang dude, that's it, I'm upgrading to the Silver Z-caps!

Must have measurements and listening impressions...this weekend please!

"Our son's first crossover. They grow up so fast!"

Awwww....

If he had done all Jantzen Silver's it would have been over a grand for just the Caps!

Uh huh...rediculous $$$$. That would buy quite a few drivers among other things.

Hummm, my investigative skills are kicking in... Must...not...jump to...conclusions...


So, what benefit would one gain from going the all Jantzen Silver route? Sounds like the definition of "deminishing" returns.


DUDE... Not bad! They look way more than $200 a piece!

keep in mind that changing out components will have some effects on the overall results of the crossover. In the case of capacitors it is less of an issue than with inductors, but it still plays a factor. I used to design crossovers and people would always try to change out the inductors for "better ones" not understanding why it didn't sound right when done. They failed to realize that the resistance of those inductors plays a part in determining the phase relationship between the drivers.

I know nothing (and I mean nothing) about crossovers. With that said I noticed that in Bwaslo's plan he listed 27 uf, 50 uf, and 2 uf for the capacitor values. If I am looking at your picture correctly, you are using 27 uf, 47uf, and I can not see the smaller capacitors. I don't know if that will affect the overall sound or not. With that said it does look damn sexy!!!

Often people think that a crossover just needs to get the response flat. There is much more to it than that. I have heard many that measure flat but just don't sound good at all. There is a lot of phase shift and no phase coherency at the crossover point. Changing components definitely affects this phase relationship between the drivers. There is less difference between capacitors and how they change the phase relationship of the crossover than inductors. If you wanted you could actually test to compare what their effects are. The easiest way to see what is happening is probably to put the drivers out of phase. With the drivers out of phase, you should have a deep null at the crossover point, 30dB or so. This this also indicates that there is good phase coherency between them when drivers are in phase. Do the measurement that shows the null with both capacitors. If they really are equivalent in all ways you shouldn't see much change in this null.

In the case of inductors, switching from a high wire gauge to a low wire gauge will have a big difference on the resistance of that inductor. Resistance in an inductor does waste power, but isn't necessarily a bad thing in terms of sound as long as the design accounts for it. If you go from a 16awg inductor to a 14awg inductor though, you will have drastic results. All of the other crossover component values will have to be altered because the resistance affects the relationship of all the components.

John

Actually beast I switched out the erse 18awg I core to the 16awg super Q, though I doubt that will cause any issues. It is something like a 0.1 ohm difference, In my design simulations I have never seen a small change like that on a 2nd order woofer circuit to do much at all.

Still though, it's cool to stir the pot and see what comes up. Great work! I remember Bill said you can always go with lower DCR, it can't hurt.

You're gonna be a happy camper beast, you'll be impressed I think.

2226's "layin' around"...sheesh, that's why your wallet Hz.

Lol. I've got 18 of them...just layin' around. My wallet is in hell!

Sheeyiit man! WOW! No kidding. lol.

Put those heavy hitters to use! You got the amps and DSP power for it.

...and they're just sitting around, doing nothing. For shame.

Outstanding buddy! I'm really interested in seeing how these turn out after you apply the poly! Be sure to get some close-ups of the edges if you don't mind!

Looking great for sure man.


Sweet! Congrats!

Yeah, a few weeks (at least) of itensive potty training may be in order...lol