Yes, I guess I was in the middle of checking them on the meter and writing the actual value on them. A whole bunch ended up being used in the padding and notch as you probably remember.
Cal,please tell me how perform(a few impressions) those (31$ now)CD Selenium D250-x 1"???I mean knowing CD's prices(even on a budget) it seems too cheaper for sounding decent,maybe I'm wrong it's something of a bargain or....???I'd more then glad if I can start my horn adeventure with this and some good tweeters.....
Thanks!
Thanks!
Hello Maestro,
I'm sure you'll find the Monacor driver here in Romania. I gave it a search and found some links. If you have troubles finding a distributor, let me know.
@panomaniac: that really looks like a nice driver. Is Mr. LeCleach having any impression on those? Used them in his horn?
Thanks!
I'm sure you'll find the Monacor driver here in Romania. I gave it a search and found some links. If you have troubles finding a distributor, let me know.
@panomaniac: that really looks like a nice driver. Is Mr. LeCleach having any impression on those? Used them in his horn?
Thanks!
Well I remember he said that he had heard them and they were a very nice budget solution. I don't think they go very high (they aren't meant to) but should play OK down to about 300Hz.
Here is the post:
http://www.diyaudio.com/forums/multi-way/140190-jean-michel-lecleach-horns-10.html#post1781991
Looks like it doesn't play very high, sorry....
Here is the post:
http://www.diyaudio.com/forums/multi-way/140190-jean-michel-lecleach-horns-10.html#post1781991
Looks like it doesn't play very high, sorry....
Maestro,
My impression of the Selenium 250 is mixed. If you look at the response curve and are prepared for what you get, they are a real bargain. If you just hook them up, you'll find they sound like one of those PA horns you hear at the circus. I am happy with my implementation but it took a while to get it right.
My impression of the Selenium 250 is mixed. If you look at the response curve and are prepared for what you get, they are a real bargain. If you just hook them up, you'll find they sound like one of those PA horns you hear at the circus. I am happy with my implementation but it took a while to get it right.
Geddes has posted several times that price does not dictate CD performance. Its more about the waveguide and crossover design. I remember he posted that he had $15 knock-offs from Asia that were as good as his B&C choice.
In my limted experience bolt on has less issues then screw on choices and Im a huge fan of the Celestion CDs that are found in the QSC HPR-152i and HPR-122i speakers. QSC Parts site sells them at bargain prices.
I have them (Celestion CDs), the Selenium D220, BMS 4550, BMS 4552 to test and listening too. The BMS are #1, Celestion #2 and the Selenium #3 in choice.
Its been stated many times in the past, B&C is a significant improvement over Selenium
Regarding Monacor
Several of their latest hifi drivers are Tangband
Several of their pro drivers are really Celestion
But which of the CDs, I dont know
One is obvious tho
One or several may be from Visaton
But maybe just one certain particular CD may be the real good one
Regarding Monacor
Several of their latest hifi drivers are Tangband
Several of their pro drivers are really Celestion
But which of the CDs, I dont know
One is obvious tho
One or several may be from Visaton
But maybe just one certain particular CD may be the real good one
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Well, not to put you off, but here is my "theoretical experience" 
so far:
I am too after a high efficiency, low distortion system. Another goal would be to avoid a crossover in the 1Khz - 7Khz or so region. And of course if I get this to be transient perfect, it would be great.
After some documentation it seems I have the next options:
1. Two-way, Geddes style monitor. The things affecting the distortion figures are the drivers themselves (how much copper in the motor, surface area, etc.). Even with a 15" woofer and wave-guide, this would still be a low efficiency loudspeaker (probably 95dB at 100Hz)
2. Three-way, waveguide on top, 12 inch midrange in a short horn (Omnitop 12). This would be truly high-efficiency, at least 103dB, but I have no idea what to to with the bass section. Crossover points at 80Hz and 900Hz
3. Unity/Synergy style. Point source radiation from 300Hz to 18Khz, high efficiency, don't know what to do with the bass. Quite complicated to build, probably most complicated from all of them.
4. PaulW style. Waveguide on top, array of 4-12 seven inch midrange drivers in parallel for really low distortion, something for bass.
If you ask me, considering the experience level needed for doing a good midrange horn driven by a cone, I would forget 3-way. I would try this in the future, but not now. For me Geddes style is the way to go. If I would had more space and more money, I'd try PaulW's configuration.
I'd concentrate in finding some very good 15" woofers, with lots of copper in them, going up to 900Hz (think AESpeaskers, B&C, 18Sound) and a serious 1" CD (B&C DE250 for example), mated with a 15" oblate-spheroid waveguide or LeCleach horn.
so far:I am too after a high efficiency, low distortion system. Another goal would be to avoid a crossover in the 1Khz - 7Khz or so region. And of course if I get this to be transient perfect, it would be great.
After some documentation it seems I have the next options:
1. Two-way, Geddes style monitor. The things affecting the distortion figures are the drivers themselves (how much copper in the motor, surface area, etc.). Even with a 15" woofer and wave-guide, this would still be a low efficiency loudspeaker (probably 95dB at 100Hz)
2. Three-way, waveguide on top, 12 inch midrange in a short horn (Omnitop 12). This would be truly high-efficiency, at least 103dB, but I have no idea what to to with the bass section. Crossover points at 80Hz and 900Hz
3. Unity/Synergy style. Point source radiation from 300Hz to 18Khz, high efficiency, don't know what to do with the bass. Quite complicated to build, probably most complicated from all of them.
4. PaulW style. Waveguide on top, array of 4-12 seven inch midrange drivers in parallel for really low distortion, something for bass.
If you ask me, considering the experience level needed for doing a good midrange horn driven by a cone, I would forget 3-way. I would try this in the future, but not now. For me Geddes style is the way to go. If I would had more space and more money, I'd try PaulW's configuration.
I'd concentrate in finding some very good 15" woofers, with lots of copper in them, going up to 900Hz (think AESpeaskers, B&C, 18Sound) and a serious 1" CD (B&C DE250 for example), mated with a 15" oblate-spheroid waveguide or LeCleach horn.
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Do that with a cone. The only CD I can think of that will do it well is the Community M200, expensive and may not do the top end.
A scaled down version of Erik's Tractrix midbass would do the job (2nd one down).
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