Yes Celef. A bit bad and I kept on doing it. 
Of course I wasn't sure why they were a bit bad and that was the discovery part. A friend of mine once wisely said "Don't crossover where you think it should be - crossover where it sounds good." It took awhile for that to sink in. Once I gave up my preconceptions, things started to work better.
Of course I wasn't sure why they were a bit bad and that was the discovery part. A friend of mine once wisely said "Don't crossover where you think it should be - crossover where it sounds good." It took awhile for that to sink in. Once I gave up my preconceptions, things started to work better.
Bouthan flag...
crossover pass exam : Anakin's Test - Jedi Council Scene | Star Wars The Phantom Menace (1999) Movie Clip 4K - YouTube
"I sense much FIR in you" , (Diyiggy trademark)
crossover pass exam : Anakin's Test - Jedi Council Scene | Star Wars The Phantom Menace (1999) Movie Clip 4K - YouTube
"I sense much FIR in you" , (Diyiggy trademark)
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Yes Celef. A bit bad and I kept on doing it.
Was this completely detached from measurements? Maybe a measurement you forgot to respect or did not anticipate? It would seem that if you can hear it....you can measure it.
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Not completely detached from measurement, no. Just a desire to hit - or stretch to - certain points that really didn't sound as good as they could. Although the measurements seemed pretty good, the sound wasn't as good as it could be. But I learned to better read and understand the measurements. Measuring is one thing, understanding the measurements, and measuring the right thing is another.
I knew you'd have a good response!....the question is if =
then what exactly would set for criteria for one who is about enbark (me) on the journey mating a horn/cd bombo witha woofer...etc...polar wise, I'm set up ok...the horn is about the same width as the 15" woofer....as long as I can crossover before Ka=2=573hz I'll be ok...aiming for 400hz with a ~320hz horn and the Axi...
Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way? - the horn is ~ 15" wide...Woofer (AETD15m) fs is 34.7hz.....I think for the first time in almost a year I just realized I have no idea what size voice coil my drivers have lol...the mms is 70g...
34400/pi/5.1 = ~2107 Hz upper pistonic BW.
Theoretical 'best' XO point = [34.7*2147]^0.5 = ~273 Hz mid-band ~equal power distribution, best overall horn/woofer overlap. As you shift the XO point higher you'll need to know its TL modes BW polar response for best overall match-up.
The link didn't take me to the horn specs, so don't know if you can go this low........anyway, if it hasn't been bought or isn't available, then try to keep it as close to this as practical up to the pioneer's 500 Hz upper limit. Above this point for a 15" it was more about saving space, cost considerations and why they have poor off axis matches until the expo horn's gain BW petered out and it was just a WG: Altec's highly acclaimed M19 is an example.
GM
Theoretical 'best' XO point = [34.7*2147]^0.5 = ~273 Hz mid-band ~equal power distribution, best overall horn/woofer overlap. As you shift the XO point higher you'll need to know its TL modes BW polar response for best overall match-up.
The link didn't take me to the horn specs, so don't know if you can go this low........anyway, if it hasn't been bought or isn't available, then try to keep it as close to this as practical up to the pioneer's 500 Hz upper limit. Above this point for a 15" it was more about saving space, cost considerations and why they have poor off axis matches until the expo horn's gain BW petered out and it was just a WG: Altec's highly acclaimed M19 is an example.
GM
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From horns.pl ? If yes then they are Iwata JMLC provided by Jean Michel Le'Cleach (point cloud) that I modeled in 3D back ten years ago.
My opinion (may change) - it's hard to get waveguides right. Sound can be very nice for few minutes but ears can get tired. I'm using modified esl57 and sound is very pleasant/natural despite shallow directivity and not spectacular measurements. They shown my horn designs were poor.
Hello All,
When it comes to control of directivity and SPL/Watt you cannot beat horns and waveguides. Because they are compression drivers and horns/waveguides they have compression and acoustic impedance distortion effects. Many or most CD diaphragms break up at high frequency.
Like it or not CD’s/horns/waveguides have a signature sound, they sound like horns period.
No amount of equalizing the ragged acoustic impedance of a CD/horn/waveguide will help. Short fast flairs do help. Phase, Impedance, Frequency Response and FFT measurements demonstrate the inherent ragged performance of Compression Drivers/horns/waveguides.
Turn off all the analyzer smoothing tools and look at the raw data plots. The CD/horn/waveguide plots look like saw teeth. That is why CD’s/horns/waveguides sound the way that do. They have a signature sound.
Where Directivity Index is required to control in room power response my preference is large cone woofer and mid-range drivers up to about 2KHz then a carefully selected short throw CD/waveguide for a tweeter. Keep the CD/horn/waveguide away from the critical for voice midrange.
Thanks DT
When it comes to control of directivity and SPL/Watt you cannot beat horns and waveguides. Because they are compression drivers and horns/waveguides they have compression and acoustic impedance distortion effects. Many or most CD diaphragms break up at high frequency.
Like it or not CD’s/horns/waveguides have a signature sound, they sound like horns period.
No amount of equalizing the ragged acoustic impedance of a CD/horn/waveguide will help. Short fast flairs do help. Phase, Impedance, Frequency Response and FFT measurements demonstrate the inherent ragged performance of Compression Drivers/horns/waveguides.
Turn off all the analyzer smoothing tools and look at the raw data plots. The CD/horn/waveguide plots look like saw teeth. That is why CD’s/horns/waveguides sound the way that do. They have a signature sound.
Where Directivity Index is required to control in room power response my preference is large cone woofer and mid-range drivers up to about 2KHz then a carefully selected short throw CD/waveguide for a tweeter. Keep the CD/horn/waveguide away from the critical for voice midrange.
Thanks DT
- This isn't true for all horn/CD combos....is it?
Here's my driver on Seos 30
Not much going on in the Impedance that I see.....Is this FR "saw toothed"? The charts are definitely smoothed but the impedance doesn't have much character to it at all...I think you might be talking of certain Horns....I've had enough discussions here to believe that certain profiles like that of the Salmon, are very very neutral, requiring the least amount of eq, in comparison to other horn/waveguides....
Maybe you can find (and post) some measurements to visually express your view of this relationship. I have read of other highly praised CD's that even though the FR wasn't as nice as the comparison drivers....its impedance showed much lower resonance. I have not personally took time to compare dynamic driver impedance to that of potential horn/cd combos....
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Mine don't. They don't sound like horns at all - they sound like music or voices or whatever you put thru them.
My current system is vintage Magnepan. I find them more colored than the good horn systems I've built. I like them very much, but they are not as neutral or transparent.