Greets!
Hmm, a 1.4" is normally used for much lower XO points and historically don't go very high, so wondering what you're going to use for a (super) tweeter since IME they don't sound too good EQ'd out to 20+ kHz.
Hmm, a 1.4" is normally used for much lower XO points and historically don't go very high, so wondering what you're going to use for a (super) tweeter since IME they don't sound too good EQ'd out to 20+ kHz.
Greets!
Just saw this! Sorry, it's really bad IME as a designer/your design plus your taper is minimal, so might as well just made it a constant taper (straight pipe) plus driver at the very top makes for driver max loading, requiring max stuffing to smooth it.
Anyway, will do a Hornresp sim, so what driver center/floor dimension (minus material thickness = i.d.) do you want and will the horn be perched on top or inside? If the latter, how wide, tall, deep (i.d.) must the pipe be at this point?
Also, what type of amp and if tubes, then need its output impedance, not tap rating, unless it's a matching impedance amp.
Just saw this! Sorry, it's really bad IME as a designer/your design plus your taper is minimal, so might as well just made it a constant taper (straight pipe) plus driver at the very top makes for driver max loading, requiring max stuffing to smooth it.
Anyway, will do a Hornresp sim, so what driver center/floor dimension (minus material thickness = i.d.) do you want and will the horn be perched on top or inside? If the latter, how wide, tall, deep (i.d.) must the pipe be at this point?
Also, what type of amp and if tubes, then need its output impedance, not tap rating, unless it's a matching impedance amp.
HI!
Thanks for your answer/opinion.
The amp is a ST70 ( output impedance from the 8 ohm tap was 0.7 ohm from 20Hz to 1kHz, falling to 0.46 ohm at 20kHz) .
The horn will be on top ..
Max size for the box 15" deep, 40" high. And i really would like the internal width to be 11,8"
I found some measured T/S on the web https://www.dibirama.altervista.org...are-hwg160-mid-woofer-6-5-8-ohm-260-wmax.html
//RyssjonSWE
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Greets!
Happy New Year and all that jive! 🙂
OK, will be gone for most/all? of the day, but will do a sim as time permits if nobody beats me to it.
Happy New Year and all that jive! 🙂
OK, will be gone for most/all? of the day, but will do a sim as time permits if nobody beats me to it.
Interesting combination of drivers, can you give some more info.
Is compression driver FaitalPRO HF1440 ?
Which horn you'll going to use with it?
Unibox simulation looks good. I think you should go with it.
Regarding TL, if you want smooth response you need good amount of stuffing which reduces efficiency, and then you have to compensate with large(r) box.
Also, Ciare has low Qts / high EBP and thats another factor that leans towards large TL volume.
Is compression driver FaitalPRO HF1440 ?
Which horn you'll going to use with it?
Unibox simulation looks good. I think you should go with it.
Regarding TL, if you want smooth response you need good amount of stuffing which reduces efficiency, and then you have to compensate with large(r) box.
Also, Ciare has low Qts / high EBP and thats another factor that leans towards large TL volume.
T/S max flat math:
net volume (Vb) (L) = 20*Vas*Qts'^3.3 = ~11.384 L
box tuning (Fb) (Hz) = 0.42*Fs*Qts'^-0.96 = ~53.4 Hz
[Qts']: [Qts] + any added series resistance [Rs]: http://www.mh-audio.nl/Calculators/newqts.html = ~0.31
As DD noted it would normally be tiny and tuned up around 53 Hz.........
Your internal net Vb assuming ~3/4"(1.9 cm) panel thickness = 13.5"x 11.8"x 38.5" = ~6133"^3/1728 = ~3.549 ft^3/100.5 L less a bit for bracing, driver = ~3.2 ft^3/90.61 L, so a big box Vs T/S with plenty of acoustic efficiency
That said, went to sim only to find I did an inverse tapered TQWT awhile back using published specs tuned to high 40s (damped) and it's only 38 L (measured specs sim is identical performance wise).
Simming your 25 L/39 Hz and assuming 2pi space, it's tuned to ~30.5 Hz in HR with a ~38.3 cm long vent for ~39 Hz plus as I assumed, its response shelves downward ~6 dB/39 Hz Fb from its ~266 Hz Fhm* due to its low Qts.
* T/S theory peters out at the driver's effective upper [Fhm], lower [Flc] mass corners, so any bandwidth response plot beyond these points are strictly due to [inputted] inductance [mH] and/or mass roll off, with on-line freeware generally just flatlining it:
Fhm = 2*Fs/Qts'
Flc = Fs*Qts'/2 [normally never used]
Qts' = 2*Fs/Fhm
So...........where to go from here? BR or TQWT or use your big box for a vented TL (MLTL not yet simmed) that most folks nowadays opt for or.......?
net volume (Vb) (L) = 20*Vas*Qts'^3.3 = ~11.384 L
box tuning (Fb) (Hz) = 0.42*Fs*Qts'^-0.96 = ~53.4 Hz
[Qts']: [Qts] + any added series resistance [Rs]: http://www.mh-audio.nl/Calculators/newqts.html = ~0.31
As DD noted it would normally be tiny and tuned up around 53 Hz.........
Your internal net Vb assuming ~3/4"(1.9 cm) panel thickness = 13.5"x 11.8"x 38.5" = ~6133"^3/1728 = ~3.549 ft^3/100.5 L less a bit for bracing, driver = ~3.2 ft^3/90.61 L, so a big box Vs T/S with plenty of acoustic efficiency
That said, went to sim only to find I did an inverse tapered TQWT awhile back using published specs tuned to high 40s (damped) and it's only 38 L (measured specs sim is identical performance wise).
Simming your 25 L/39 Hz and assuming 2pi space, it's tuned to ~30.5 Hz in HR with a ~38.3 cm long vent for ~39 Hz plus as I assumed, its response shelves downward ~6 dB/39 Hz Fb from its ~266 Hz Fhm* due to its low Qts.
* T/S theory peters out at the driver's effective upper [Fhm], lower [Flc] mass corners, so any bandwidth response plot beyond these points are strictly due to [inputted] inductance [mH] and/or mass roll off, with on-line freeware generally just flatlining it:
Fhm = 2*Fs/Qts'
Flc = Fs*Qts'/2 [normally never used]
Qts' = 2*Fs/Fhm
So...........where to go from here? BR or TQWT or use your big box for a vented TL (MLTL not yet simmed) that most folks nowadays opt for or.......?
Whatever type of box is used, the combination is interesting...sting!! I have used a much cheaper driver ( Lavoce 1.3"...it's a dome tw) in combination with the ( supposedly, since I own the previous series) excellent midbass.
Isn't a 1k2 Hz too low & bad as a crossover point? Aside the point that a compression driver needs to be padded 20 dB...
Point taken?
You lose about 2 octaves from mid-wf, you'll say, it depends .
Oh sorry, DavorC., I was talking to OP!
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Hi,
Yes its the FaitalPro HF 1440 and the horn i RCF HF950
https://www.rcf.it/en/products/product-detail/hf950
You're welcome!
Vented
Sealed box math
OK, you'll have to us the desired horn/woofer vertical layout in relation to the floor.
Vented
Sealed box math
OK, you'll have to us the desired horn/woofer vertical layout in relation to the floor.