Tooling for the baskets needed renewal, and it was not viable (a guess based on what little infoi have). Its decendant lives on with the CHR-90. Like the Sibelius clones i would recommend an enclosure design for the specific driver being used (i am not excited by people stuffing the wrong driver into the .enclosure for another driver, ie Sibeius clones)
dave
Excellent work! Pretty impressive
Care to show us how the measured response looks like e.g . near field of the drivers and fb from the bass port? thank you ☺️
Biggest upgrade for the excellent Sibelius clones is a steep highpass filter below tuning frequency . This can be done with a WiiM Ultra. If fb is 35 Hz , set the stereo highpass filter for the main speakers in the subwoofer meny to 35 Hz . It will roll off below that frequency with 24dB/oct electrical. The Ultra puts out a filtered signal through spdif also, if one want to use an external dac as I do.
Now , the sound will be much cleaner and one can play louder .
I have done this with my towers ( at the moment using chn110 )
One could also use dsp to take down the +3 dB diffraction bump between 750-1000 Hz on the original Sibelius. This is depending entirely on the box size and the sides that are not rounded. This can also be done with an Ultra or WiiM PRO, using the PEQ : frequency 850 Hz , gain -3 dB, Q 3.
Also, if one wants to have their Sibelius out in the room , they need some baffel step compensation from 400 Hz and below. This can be done using the shelving function in the Ultra/Wiim PRO . Frequency 400 Hz, gain +2 dB , Q 3
https://trueaudio.com/st_diff1.htm
After done those tweaks, theres no need system matching with tube amplifiers and so on…. Just a clean class D tpa3255 will sound fine.
Now , the sound will be much cleaner and one can play louder .
I have done this with my towers ( at the moment using chn110 )
One could also use dsp to take down the +3 dB diffraction bump between 750-1000 Hz on the original Sibelius. This is depending entirely on the box size and the sides that are not rounded. This can also be done with an Ultra or WiiM PRO, using the PEQ : frequency 850 Hz , gain -3 dB, Q 3.
Also, if one wants to have their Sibelius out in the room , they need some baffel step compensation from 400 Hz and below. This can be done using the shelving function in the Ultra/Wiim PRO . Frequency 400 Hz, gain +2 dB , Q 3
https://trueaudio.com/st_diff1.htm
After done those tweaks, theres no need system matching with tube amplifiers and so on…. Just a clean class D tpa3255 will sound fine.
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Edit - the dsp correction should be 950 Hz ( not 850 ) , gain -3, Q =3
The Alpair 10 series had reached the end of its practical life. The first generation was released almost 20 years ago and the tooling / jigs for the basket were reaching the end of their mass-production lifespan -fine for relatively small batches like the custom Pearl units, but not for larger scale production any more. The cost involved in re-tooling for the old basket was too great to justify, but a significant number of its motor, suspension & cone components are used in CHR-90 in slightly revised form.
It was -sales were in steady decline for the last few years though as buyers shifted toward more recent releases.
Depends who you ask and what they're up to -11MS is a larger (about 20%) unit, with slightly different design objects so they're not directly comparable. CHR-90 is the closest thing to the 10.3 -because as I say above, it actually uses quite a lot of 10.3 components.
I made some Frugel-horn XLs.
And although they sound really nice they are lacking in deep and tight bass.
Bass out of an original Sibelius are dry like a bag of Sahara sand.And that bass goes way down.
I hear them on a regular basis at my brother' s .
There probably is a reason Harley made them or has them made out of 3 cm thick oak.
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a sufficient floor-wall corner behind the enclosure is part of the design. absent that, a Voigt/Pearl variant or Pensil calculated to the particular driver would be the way to go.
If you don't like the price you can buy somewhere else, no problem.
You can buy the 10.2 for 500.
Edit: you can buy also the silver if you want? https://www.marktplaats.nl/v/audio-...o-alpair-10-3-zilver-breedband-speakers-nieuw
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