Curvy Speaker Experiments

[gdmoore28]

Re: Curvy Speaker Experiments

Ken, you are a most talented cabinet builder. Just lovely stuff.

Update on the curvys: Extended listening provides a lot of insight. I've removed all of the poly filling from the cabs. Bass response is much, much better without it. Bass response and treble response continue to impress, but I'm not able to live with the aluminum mid. Crossover design likely has a lot to do with it, but the mids are just not warm enough. they sound constricted. So I'll be switching out the mids for some nice paper mids I have on hand, then I need to do some serious crossover work. I think a properly designed crossover is the key to these. Should go without saying, but sometimes I get very pleasing results from off the shelf crossovers, and sometimes I don't . This is one of the times I didn't.
GeeDeeEmm

[Sydney]

Re: Curvy Speaker Experiments

After building a pair of small curved cabinets for no other reason than to see if I could do it,

:applause:
( been a big fan of non-rectilinear enclosures since I bought a pair of Focal Eggs in the 80's )

[Melby Audio]

Re: Curvy Speaker Experiments

You probably could get satisfactory results with your current mid with a proper crossover. What you are hearing is probably cone breakup not being handled properly.

[Chris Roemer]

Re: Curvy Speaker Experiments

I modeled your setup. I'm always surprised when a "textbook" XO works as well as this one. A Zobel won't help in THIS case, but . . .

try adding a 4 ohm (padding) resistor in front of the high pass, and jump across the mid's 0.70mH coil with a tiny 0.68uF cap.
Cross points end up near 550Hz and 2.5kHz (with or w/out my 2 suggested mods).

Did you see this?

http://techtalk.parts-express.com/showthread.php?228129-Original-Large-Advent-upgrade-with-Dayton-drivers&highlight=DA270

[gdmoore28]

Re: Curvy Speaker Experiments

I modeled your setup. I'm always surprised when a "textbook" XO works as well as this one. A Zobel won't help in THIS case, but . . .

try adding a 4 ohm (padding) resistor in front of the high pass, and jump across the mid's 0.70mH coil with a tiny 0.68uF cap.
Cross points end up near 550Hz and 2.5kHz (with or w/out my 2 suggested mods).

Did you see this?

http://techtalk.parts-express.com/sh...ighlight=DA270

Chris, I'm a little too hesitant to ask anybody's help on this stuff, but I always look forward to your jumping in on peoples projects. You are one of the most polite and helpful folks on this site, offering clear insight and helpful suggestions -- so thanks A LOT for the suggestions. I really appreciate it.

No, I hadn't seen the previous post featuring the same drivers as I've used. This gives me hope that I might be able to rescue this project after all.

Most appreciative,
GeeDeeEmm

[Chris Roemer]

Re: Curvy Speaker Experiments

ALMOST the same. Lee used the 4" DA mid.
Your "stock" XO is far from ideal, but my "tweaks" should make it sound better.