Thanks for reply. My advices is probably better with a ported speaker, thats true.
No when I have you here, is the Alpair 11M a sound upgrade to chn110 on all acounts ? You can PM me ( so we dont get OT ). I think the chn110 is a fantastic sounding driver.
No. CHN-110 is capable of going lower, is a bit smoother up top (if stock), but lacks DDR.
I’m likelu going to put CHN-110 backing FH-XL, ihave A11ms (with minor tweaks to help the top) in a set of Bernie’s solid wood Compact Floorstanders.
dave
Back to building the Sibelius myself, because that is what this thread is about. Here are the measurements in my room at 1 meter distance from the driver and at 0 meters from the bass port. Of course you can also see the resonances of my room. I measured here with 100 grams of longhair wool (red lines) and 78 grams (blue lines)
The sound of the Sibelius is very natural and spacious. I have never heard anything so beautiful! You don't want to spoil that with filters. The power of design is that the driver is connected directly to the amplifier!
Very nice, finally some significant information that indicates the correlation between what is measured vs. what is heard. Well done 🙏☺️
A good dsp keeps the direkt contact with the driver - its a win-win.
Im sure that some dsp filtering and PEQ can make the Sibelius sound even better.
Nice to see some relevant measurements 1 meter from the Sibelius speaker.
I hope your measurements is with only one speaker active ?
What microphone did you use ?
A dsp would surely make the sound even better . In not saying that a flat response is the best , far from it, but the -5 dB dip at 3,5 kHz would sound better with a -3 dip instead. And that diffraction peak at 850 Hz ( + 2,5 dB ) coming from the geometry of the box is also easily bettered with some mild help of PEQ.
All of you with the Sibelius that have a dsp : Just print frequency : 850 Hz , gain : - 2,5 dB , Q: 3 . And PEQ = frequency : 3,5 kHz , gain +2 dB , Q= 1
Try it and come back for report.🙂
* the dropping curve is only the bass port.
We see diffraction at 850 Hz and a bit to little energy at 3.5 kHz .
Edit: this frequency response is rather similar to the chn110 driver that I have.
I hope your measurements is with only one speaker active ?
What microphone did you use ?
A dsp would surely make the sound even better . In not saying that a flat response is the best , far from it, but the -5 dB dip at 3,5 kHz would sound better with a -3 dip instead. And that diffraction peak at 850 Hz ( + 2,5 dB ) coming from the geometry of the box is also easily bettered with some mild help of PEQ.
All of you with the Sibelius that have a dsp : Just print frequency : 850 Hz , gain : - 2,5 dB , Q: 3 . And PEQ = frequency : 3,5 kHz , gain +2 dB , Q= 1
Try it and come back for report.🙂
* the dropping curve is only the bass port.
We see diffraction at 850 Hz and a bit to little energy at 3.5 kHz .
Edit: this frequency response is rather similar to the chn110 driver that I have.
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Well, if your filtering /EQ is upstream or even inside the amp, then isn’t that connection still direct?
Red is more stuffing (100 grams) and more output. More important; the resonance frequencies are equally high, what means that the transmission line and the bass port are tuned to the driver.
With dsp the Sibelius will probably have a flatter characteristic, but also sound flatter (and shriller), which means you lose the natural sound / you lose the magic of this speaker! I had Harbeth speakers before, which are also known for their natural sound and they had the same characterstic in my room! I only used a lf-dsp with my rel sub, which is no problem, because it's only for the low frequencies.
You many be right about this, but small corrections with a good dsp ( read WiiM ultra ) that doesnt do sample rate conversion, can possibly make the sound even better . If it doesnt, then fine.🙂. You will still have direct connection to the amplifier and driver.
Its a win-win to try it .
I just encourage people to try it out , and I can only say that my tower speakers with chn110 went better sounding with dsp ( It was rather good sounding without it, also ) .
With dsp, the resulting sound made me sell my expensive Genelec SAM monitors.
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In fairness, nothing very dramatic. a/ Xmax is a [not especially meaningful] figure for linear deflection, not the limit of mechanical travel, and b/ the drivers have built-in arrestors that indicate when you've reached rated Xmax.
Of course, if you want large amounts of LF dynamic range, especially in big rooms, then you need to buy a larger speaker with at least the same LF extension & larger (or greater number of) LF drive units -no mysteries there, just a law of physics. But not everybody wants / needs that, and I suspect most buyers do understand that if they need more on those lines, then a relatively compact standmount or floorstander with a 5 1/4in driver isn't likely to suit them.
Of course, if you want large amounts of LF dynamic range, especially in big rooms, then you need to buy a larger speaker with at least the same LF extension & larger (or greater number of) LF drive units -no mysteries there, just a law of physics. But not everybody wants / needs that, and I suspect most buyers do understand that if they need more on those lines, then a relatively compact standmount or floorstander with a 5 1/4in driver isn't likely to suit them.
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