What's up with the foam in the WG's in the geddes speakers? I was reading the very little bit they have about the speakers on his site and didnt see anything about it. Maybe i overlooked it. But ive seen other people use foam in their WG's as well. What type of foam and whats it suppose to do?
Opinion's on econowave speakers or other suggestions for mains??
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Its all about the "HOMs", which in dummy terms for me just means the HONK of a horn. The foam and the design of the way guide eliminates the harsh sounds of the horn. Geddes calls that stuff HOMs but we can just call it the HONK. His Foam reduces the HOMs.
Here is a good thread that explains it for me.....
http://www.diyaudio.com/forums/multi...-fix-horn.html
Its all about the "HOMs", which in dummy terms for me just means the HONK of a horn. The foam and the design of the way guide eliminates the harsh sounds of the horn. Geddes calls that stuff HOMs but we can just call it the HONK. His Foam reduces the HOMs.
Here is a good thread that explains it for me.....
http://www.diyaudio.com/forums/multi...-fix-horn.html
Hey Zilch, I have decided my next build will be this one....
http://techtalk.parts-express.com/sh...=215536&page=5
I can have the waveguide above the woofer, correct?
http://techtalk.parts-express.com/sh...=215536&page=5
I can have the waveguide above the woofer, correct?
Regarding the celestion 1425 CD. I know its been measured, but has there been a x-over made for it with any sort of compensation/padding or anything like that? Or am just going to have to use a super generic 2-way w/ Lpad? Also can it be crossed at 2khz?
Yes. That's just how I set it on the test stand for measurements.
Begins here, actually:
http://techtalk.parts-express.com/sh...78#post1624578
Well, that's kinda the point, after all, isn't it...?
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Yes. That's just how I set it on the test stand for measurements.
Begins here, actually:
http://techtalk.parts-express.com/sh...78#post1624578
Well, that's kinda the point, after all, isn't it...?
Until proper filters are designed and validated for this particular combination of drivers, waveguide, and cab, chances are quite good it will sound like ass.
There's far more to successful design than slapping a random selection of components in a box....
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Until proper filters are designed and validated for this particular combination of drivers, waveguide, and cab, chances are quite good it will sound like ass.
There's far more to successful design than slapping a random selection of components in a box....
10-4 old chap! I know I know, lots of theoretical bs comes along with speaker building. Too bad it wast simpiler for dummies lol! Anyone know what WG was used when the celestion 1425 was test and where i can get ahold of the impedence charts and FR charts of the celestion? Im going to have to figure something out wing it posibly. Im stuck with the drivers once they arrive unless someone wants to take them off my hands lol.
EDIT: nevermind on the graphs search is your friend!
Quote:
Originally Posted by ZilchLab /forum/post/18219475
Until proper filters are designed and validated for this particular combination of drivers, waveguide, and cab, chances are quite good it will sound like ass.
There's far more to successful design than slapping a random selection of components in a box....![]()
10-4 old chap! I know I know, lots of theoretical bs comes along with speaker building. Too bad it wast simpiler for dummies lol! Anyone know what WG was used when the celestion 1425 was test and where i can get ahold of the impedence charts and FR charts of the celestion? Im going to have to figure something out wing it posibly. Im stuck with the drivers once they arrive unless someone wants to take them off my hands lol.
EDIT: nevermind on the graphs search is your friend!
First look soon, then I'll be doing the PCD thing with these.
Could have snugged the woofer and waveguide together more, but these ended up close to where the 10" QSC might, also.
This combo won't fit in New Large Advents 'cause their woofer cutouts are up higher, but there's plenty of room on the baffle of these originals, primary point being that getting up and running is no further away than ~$20 and a local thrift store, tag sale, CraigsList or FreeCycle listing....
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Could have snugged the woofer and waveguide together more, but these ended up close to where the 10" QSC might, also.
This combo won't fit in New Large Advents 'cause their woofer cutouts are up higher, but there's plenty of room on the baffle of these originals, primary point being that getting up and running is no further away than ~$20 and a local thrift store, tag sale, CraigsList or FreeCycle listing....
Sounds good; with 2510 closed box for HT, needs a sub, of course.
I've built with the PRX waveguides before, with the same "rippley" result using D220Ti:
http://www.audiokarma.org/forums/sho...00#post3341200
Brandon got similar using DE250 and a throat adapter; see his DriverVault.
With BMS 4540, his response was considerably smoother.
I'll run the vertical polars on this combo to see where it's at, then document the crossover and post the PCD design files.
Sounds good; with 2510 closed box for HT, needs a sub, of course.
I've built with the PRX waveguides before, with the same "rippley" result using D220Ti:
http://www.audiokarma.org/forums/sho...00#post3341200
Brandon got similar using DE250 and a throat adapter; see his DriverVault.
With BMS 4540, his response was considerably smoother.
I'll run the vertical polars on this combo to see where it's at, then document the crossover and post the PCD design files.
Zilch,
I have noticed in your measurements that most of the designs come out to be around 90dB, while penn and augerpro seemed to have 100dB+ measurements. Am I missing something with this because your designs are about 10dB down. I am not insinuating anything either, just looking at the squiggly lines on the graphs.
I have noticed in your measurements that most of the designs come out to be around 90dB, while penn and augerpro seemed to have 100dB+ measurements. Am I missing something with this because your designs are about 10dB down. I am not insinuating anything either, just looking at the squiggly lines on the graphs.
See the time stamps: I posted the raw driver data at 11:49 pm and the performance with a preliminary custom crossover at 3:30 am. Assume something happened in between there.
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CLIO is calibrated here at a level referenced to where I can be in there taking measurements all day every day and not go deaf. You can see in the ZilchLab pics where the test stand is relative to the computer from which I run it. I had to wear hearing protection to get the raw data on the compression driver/waveguide, even with it padded down 3 dB. Noise floor is down around 40 dB; lower in the middle of the night.
[Doing this stuff is hazardous duty....
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See the time stamps: I posted the raw driver data at 11:49 pm and the performance with a preliminary custom crossover at 3:30 am. Assume something happened in between there.
CLIO is calibrated here at a level referenced to where I can be in there taking measurements all day every day and not go deaf. You can see in the ZilchLab pics where the test stand is relative to the computer from which I run it. I had to wear hearing protection to get the raw data on the compression driver/waveguide, even with it padded down 3 dB. Noise floor is down around 40 dB; lower in the middle of the night.
[Doing this stuff is hazardous duty....
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