Those Faitals don’t excel in high Vd. Xdamage isn’t that special either. I would certainly not pick those for CB applications.
xmax is lower, but that is needed to have cleaner sound above subwoofer level. They still do loud deep bass altough, except maybe when you want to use them for pa. VD is not extreme high, but it's still reasonable. And i don't think you want your monkey box playing at 110dB anway as your tweeter (any dome tweeter) won't be happy neighter.
You don’t need shorter coils for better reproduction of -give or take- 300Hz. You need that and copper or alu in the motor design to do proper hig(her) midrange e.g. in 2-way designs.
Even the Lavoce I referred to, with double Vd, ‘only’ does 105dB/1m at 40Hz in a ported enclosure. Closed? A lot less.
Even the Lavoce I referred to, with double Vd, ‘only’ does 105dB/1m at 40Hz in a ported enclosure. Closed? A lot less.
Can you back up that with science, because it sounds like snake oil bs to me.
Btw, the 10FE330 has an alu voice coil, and the 12FE330 has a voice coil of copper. That is noted in the specs of the drivers, and cofirmed by tests.
Btw, the 10FE330 has an alu voice coil, and the 12FE330 has a voice coil of copper. That is noted in the specs of the drivers, and cofirmed by tests.
Well, why would drivers with relatively long coils be bad at (low) midrange? That was your statement and I questioned that. And I didn’t refer to the coil or coil former, but to sleeves or shorting rings, pretty bog standard motor design aspects for quality midrange behavior these days. Which the Faitals don’t have by the way.
12FE330 with Vituix datas. Sealed Qtc 0.77 : 96 liters ; w/o low pass
or :
Qtc 0.8 : 66 liters ; F3 : 50hz ; F6: 39 Hz ; F10 : 30 hz ; with electical low pass 12 db Bessel (acoustical -6dB : 320 Hz ; perfect for the NE149W-04)
Not so bad with Qtc 0.8 , group delay is 5.8 ms at 41 Hz
I would rather find a -10 Hz driver at F3 and F6. But for that price it is good and the bass of a 12" hits certainly not the same as a 8"...
A little better than the OSMC vented that as 12L bigger load. ; both 12PR and 12FE have not demodulation ring though.
or :
Qtc 0.8 : 66 liters ; F3 : 50hz ; F6: 39 Hz ; F10 : 30 hz ; with electical low pass 12 db Bessel (acoustical -6dB : 320 Hz ; perfect for the NE149W-04)
Not so bad with Qtc 0.8 , group delay is 5.8 ms at 41 Hz
I would rather find a -10 Hz driver at F3 and F6. But for that price it is good and the bass of a 12" hits certainly not the same as a 8"...
A little better than the OSMC vented that as 12L bigger load. ; both 12PR and 12FE have not demodulation ring though.
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Notice the good spl level for 2.83v of the 12FE330! (in real world certainly 2 dB less, Faital being always a little optimistic about the efficienty)
Now the twice expensive SB34RNXL with 47 L SEALED, 180 hz low pass 12dB Bessel ; Acoustical -6dB 320 Hz circa) has ONLY 89 dB efficienty but lowish cabinet, lower THD and better low end : - 5 Hz VS the 12FE330.
Fellows here often use twice to have better efficenty and more headroom for a little low boost EQ. But above the budget.
Now the twice expensive SB34RNXL with 47 L SEALED, 180 hz low pass 12dB Bessel ; Acoustical -6dB 320 Hz circa) has ONLY 89 dB efficienty but lowish cabinet, lower THD and better low end : - 5 Hz VS the 12FE330.
Fellows here often use twice to have better efficenty and more headroom for a little low boost EQ. But above the budget.
Following this thread closely. A big fan of monkey coffins.
I was actually planning something very similar to what you have listed*
My plan was for a peerless sls (830669) then a sb17nrx and a vifa bc25sc which is the famous vifa bc25 with a very small (70mm) waveguide that controlled directivity from a little over 3k, iv not used it but I have used the old bc25 without the waveguide and it punches way above its price point.
My plan was a 90L golden ratio cab, i don't buy the effect on cancellations etc once you add in midrange box and braces etc we use now but the shape leads to a perfect scale for a monkey coffin.
*I later got a very god deal on some 10" scanspeak discos and then became interested in horns and it became different build
I was actually planning something very similar to what you have listed*
My plan was for a peerless sls (830669) then a sb17nrx and a vifa bc25sc which is the famous vifa bc25 with a very small (70mm) waveguide that controlled directivity from a little over 3k, iv not used it but I have used the old bc25 without the waveguide and it punches way above its price point.
My plan was a 90L golden ratio cab, i don't buy the effect on cancellations etc once you add in midrange box and braces etc we use now but the shape leads to a perfect scale for a monkey coffin.
*I later got a very god deal on some 10" scanspeak discos and then became interested in horns and it became different build
I would not use the SB34RNXL75-8 but the SB34RNX75-6 for this, It goes lower but is slightly less sensitive than the SB34RNXL75-8, but it behaves a lot better in sealed cabinet. The SB34RNXL75-8 shines mostly in a larger ported cabinet, to large for this project. The SB34NRX75-6 is also a lot cheaper.
And those faitals work better in a ported cabinet also, not sealed. If you insist on sealed, then the SB34NRX75-6 is the best of the bunch, and no faital is that suited (without dsp at least).
And those faitals work better in a ported cabinet also, not sealed. If you insist on sealed, then the SB34NRX75-6 is the best of the bunch, and no faital is that suited (without dsp at least).
The SB34RNXL75-8 was the representative woofer used to initially determine the driver budget of £500-1000 and check cabinet size. With a representative mid and tweeter the driver cost came to around £750. Cheaper woofers are obviously preferable if they can match the performance but this one is within budget. Cheaper woofers could also form part of a budget version but I would hope to keep the theme/focus on high performance with standard range drivers.
If the speaker is to be flexible enough to work with smaller midranges in waveguides the woofer needs to behave well upto 500+ Hz.
The speaker is intended to have a bass extension to around 30-40 Hz typical of a modern big loud monitor. It is not intended to have the bass extension of a typical 12" subwoofer because of the relatively low efficiency and the likely difficulties working with smaller midranges. Some of this is not in the spec although it is to some extent implied via Hoffman's law. Should it be added?
If the speaker is to be flexible enough to work with smaller midranges in waveguides the woofer needs to behave well upto 500+ Hz.
The speaker is intended to have a bass extension to around 30-40 Hz typical of a modern big loud monitor. It is not intended to have the bass extension of a typical 12" subwoofer because of the relatively low efficiency and the likely difficulties working with smaller midranges. Some of this is not in the spec although it is to some extent implied via Hoffman's law. Should it be added?
I have a lot of experience with the SB34NRX75-6 woofer. It is an outstanding woofer in a sealed box when used up up to a 250 Hz crossover. I suspect with a better cabinet than what I use, it could be used up to 350 Hz.
For this project, I lean toward the SB34NRXL75-8 however.
Some performance comparisons:
=================== =================
For this project, I lean toward the SB34NRXL75-8 however.
Some performance comparisons:
=================== =================
After a fair bit of messing around I managed to get into the gmail and github account I set up a few years ago. Before starting another session of flapping about not knowing what I am doing I thought I would check here to see if the approach seems reasonable.
We are starting to generate some information that is perhaps worth collecting in one place for people to browse and reference.
The plan:
The default way to generate html on github is to use jeckyll which is a general tool for blogs and such. Quarto is intended for technical writing. I have no experience of generating websites with either but have authored local technical notes with quarto and it seemed fine. Has anyone had experiences that suggest one tool over the other?
Is using git to manage a bunch markdown text files a reasonable approach? An alternative might be some form wiki but I wouldn't know how to go about it and suspect it may have similar problems to the forum software when it comes to technical writing?
PS The project needs a name
We are starting to generate some information that is perhaps worth collecting in one place for people to browse and reference.
The plan:
- a project on github which people can download, edit and check locally on their PCs and then push back when satisfied
- use markdown for authoring
- quarto to read the markdown files and generate html for the website
- python scripts for sharing calculations
The default way to generate html on github is to use jeckyll which is a general tool for blogs and such. Quarto is intended for technical writing. I have no experience of generating websites with either but have authored local technical notes with quarto and it seemed fine. Has anyone had experiences that suggest one tool over the other?
Is using git to manage a bunch markdown text files a reasonable approach? An alternative might be some form wiki but I wouldn't know how to go about it and suspect it may have similar problems to the forum software when it comes to technical writing?
PS The project needs a name
If you do a ported cabinet, then i would also take that woofer, but the cabinet becomes bigger than intended I thought, the total cabinet will be more a 100L cabinet like that than a 70L. I thought Andy wanted to stay arround 70L and sealed and then this driver is not fit. The SB34NRX75-6 can fit a 50L sealed cabinet for the same response. So choices have to be made.
What I always ask myself and I can answer is how much of what I need for my living room/listening room according according to their size to my spl needs (which are hifi average, not PA) and how to size the bass withoust costly solution (multisub or arrays).
OSMC that has a 12" for instance was proven to work okay accorrding the makers in middle sized living rooms iirc with a F3 higher than the academic often talked. I am not aware of someone having the luck to listen side by side the tower iteration in 105 liters.
OSMC that has a 12" for instance was proven to work okay accorrding the makers in middle sized living rooms iirc with a F3 higher than the academic often talked. I am not aware of someone having the luck to listen side by side the tower iteration in 105 liters.
I failed to find it with google (no surprise these days). Is there a link?
PS ApeCrate is a suggestion for a name. I really am flapping a bit today.
Had a quick look but it seems a bit interactive rather than steadily developing a set of notes. Could I post html+js of animated mode shapes which is something I am likely to want in a few weeks if things go to plan? Or a small calculation in python?
I think we might need a bit of nerdiness but is github too much for those wanting to get involved? Don't know hence the questions. I am flapping around a bit at the moment but that is normal at the start particularly as I am doing other things at the same time. If updating the website becomes almost one click after things are setup that would be hard to beat. I think I will press on and see what is involved with github even we end up with something else.