So ok because the driver is strong enough (mechanical) for a 700 hz in hifi use : surmise less than 90 db average very confortble & most reccordings :7 to 8 db more average dynamics raises max? so less than 100 dB at highest peaks for most hifists at home but rare good classical reccordings that don't have loudness mixing - and in relation to the average spl 90 db listening level, most reccordings, most dacs (amps) noise floor ! -
Is it a good reading of your input, please - sorry for the noob input level - pun-here-? Often difficult to read correctly the datasheets for a simple enthusiast...
Is it a good reading of your input, please - sorry for the noob input level - pun-here-? Often difficult to read correctly the datasheets for a simple enthusiast...
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Nice!
I'm sure they are worth it.
You've ordered here, I assume?
I wouldn't hesitate to use this driver from 600 Hz and 450-500 Hz is probably ok, as is for it's smaller brother, the HF200.
The HF1440 has a 3.4" diaphragm compared to 2.91" of the HF200.
Impedance plots are a bad indicator of compression driver capabilities.
Some people use this 1", crossed at 800 Hz for livesound applications at very high SPLs:
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... So better the HF1440 so to speak about the trebles and low end in hifi use ?
Ah, 500 cm width horn for them ?
Edit : 2 ways possible with a low Le bass driver with circa 35 Fs driver, circa BR 45 hz tuning, rephrased such low pass/compression drivers in the right horn are XO proof with a 15" in the cut-off area : let be crazy : 500 to 700 cut-off?
Ah, 500 cm width horn for them ?
Edit : 2 ways possible with a low Le bass driver with circa 35 Fs driver, circa BR 45 hz tuning, rephrased such low pass/compression drivers in the right horn are XO proof with a 15" in the cut-off area : let be crazy : 500 to 700 cut-off?
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That's correct, I was mostly thinking about excursion. Impedance is virtually irrelevant.
how is it working between the impedance top peak and its lower upper feet : is there not an acoustical short-cut here created by the driver resonance materialised in the impedance peak, so spl loss ?
Or it's irrelevant because we want to use such datas with low mechanichal constraint -hifi use- i.e. the amp can manage it as far we can deal with distorsion and if X-mech is not reached?
Or it's irrelevant because we want to use such datas with low mechanichal constraint -hifi use- i.e. the amp can manage it as far we can deal with distorsion and if X-mech is not reached?
That's what I am focusing on.
The HF1440 combined with either 15PR400, 15FH500, 15FH510, or 15FH520 are proper ingredients.
Beyma offers similar drivers.
I'm currently looking at subwoofer drivers with a smooth roll-off.
Some say you need a curvilinear cone for mid-range reproduction rather than a straight one, common with subwoofer drivers.
I'll leave it at this, before I drift off-topic.
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Very fast : seems most of 15" Beyma have stifer cut-off below 1 hz...at least often ! Instinct which has nothing to see with knowledge says to me the woofer should be a little horned both to better tmatch the horn profile, match time horizontal starting point around cut-off while with the bafle step & all I don't know. My feeling it should has a the lowest Le/1 khz and a solid amp to control it in order to try to match the cd/horn... Faital 15HF250 seems to be stronger than the 15pr400 while having a worsr Le. Some says a good 15" EV with higher Fs and worse datasheet is more lively and better sounding... 
...
I believe to remember Earl G was using very stiff and heavy cone but nuclear motor (high BL)... but eventually in the Suma with multiple distributed sub if the cut-off was too high in the Suma big cabinet if very huge rooms?!
Ok, off-topic, let- you guys focus on the horn shape + cd combo, already hard to follow for me...
...I believe to remember Earl G was using very stiff and heavy cone but nuclear motor (high BL)... but eventually in the Suma with multiple distributed sub if the cut-off was too high in the Suma big cabinet if very huge rooms?!
Ok, off-topic, let- you guys focus on the horn shape + cd combo, already hard to follow for me...
Regarding woofers, it's all about the frequency response in the end, which is normally no issue if used only up to 500 - 700 Hz. So it boils down to basic directivity and the total Q at resonance (may be important for passive crossovers, irrelevant for active). Efficiency and power dissipation capability is more than good enough with these drivers. That's about it.
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This one with 4" VC would just make it.
It's a kind of JBL 2226H clone.
Raw response, except for the low pass.
It's a kind of JBL 2226H clone.
Raw response, except for the low pass.
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mabat,
if i'm not mistaken currently the only supported shape for throat entrance is circular, right?
are you planning on adding support for a rectangular shape?
it would be great to be able to design for planar drivers, AMTs, ribbon tweeters, etc.
if i'm not mistaken currently the only supported shape for throat entrance is circular, right?
are you planning on adding support for a rectangular shape?
it would be great to be able to design for planar drivers, AMTs, ribbon tweeters, etc.
A bigger still - ⌀360 mm (q from 0.995 to 0.999). Now it would be helpful being able to measure the real thing. Although noticeably smoother, there are still apparent some high Q resonances and I wonder how real they are.
The last two examples are for a modeled rear side.
The last two examples are for a modeled rear side.
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