SDDBH and DDVP are not designed specifically for this project.
I think the CHP-90 mica's specially designed "Pensil CHP90" is the more better choice?
I think the CHP-90 mica's specially designed "Pensil CHP90" is the more better choice?
I've never listened to Pencil. But it is a similar construction close to your own.
According to Scottmoose, that partition is not needed internally.
Similar volume in the box gives similar results according to his theory. There will be a low flow rate through the port.
In a regular BR that gives a higher flow rate through the bass reflex tube.
This affects the sound in the bass further up in the frequencies.
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I'm thinking about making a box with the MiniOnken for the Alpair CHP-90. I am very happy with the Alpair 10Maop where I use this construction. Tight lovely bass nice lovely upper bass and clear mid range.
I got good help from planet10 to be able to build these. Complete drawing of an advanced box.
Seems like they don't have much of a problem with resonances. With the 6 ports, the risk of wind noise is reduced. Of course, they don't go as deep down in frequency as the larger boxes. They are even a little less than the optimal volume. The bass is really well articulated. You hear all the frequencies. No monotony there.
Worth thinking about.
Alpair 10.2 Maop have SD 90cm2 Fs 43hz
Alpair CHP-90 have SD 85cm2 Fs 48hz
Not so big difference.
I got good help from planet10 to be able to build these. Complete drawing of an advanced box.
Seems like they don't have much of a problem with resonances. With the 6 ports, the risk of wind noise is reduced. Of course, they don't go as deep down in frequency as the larger boxes. They are even a little less than the optimal volume. The bass is really well articulated. You hear all the frequencies. No monotony there.
Worth thinking about.
Alpair 10.2 Maop have SD 90cm2 Fs 43hz
Alpair CHP-90 have SD 85cm2 Fs 48hz
Not so big difference.
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This reminds me strongly "TABAQ" without the port.
https://www.diyaudio.com/community/threads/tabaq-tl-for-tang-band.88787/page-165 #post 3281
Elias
I am not allowed to show drawings from Alpair 10Maop miniOnken box.
They are sold by planet10.
I don't think planet10 has made a specific plan for the Alpair CHP-90. These drivers are quite new for us in the EU and USA.
But I have links from pictures of similar buildings where you can see how they look.
https://www.planet10-hifi.com/fonken.html
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Thank you nandappe for suggestions on 14L Japanese distributor and also for the Pencil!
I would like to try the Pencil but not the right size for my desktop! 😉)
I'll probably make a test box for Pensils just because really too curious about how they'll sound!
At the moment I'm using my temporary (clamped) 20L BR plugged together with my RS100-4 TL and, bi-amped through the sub out of the Aiyima T9 to a BT20A and the sound is globally reaaallly! great! 🙂)
Great also for the MiniOnken! thx LeifB60! Those will fit perfectly on desktop, I just don't like too much the shape and the ports... but if they sound really well for near field prob I can close an eye about those mini slots...
Interesting also the similarity in parameters with the MAOP!
I did also found a nearly identical values btw the CHP-90 and the Tang Band W5-1880, so thought that some enclosure made for the TB would fit also the CHP-90!
Let's see...
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http://p10hifi.net/tlinespeakers/FAL/images/Tysen-comp.jpg
This type of enclosure construction (as a "little modified" DDVB -a slot opening at the narrow side of the voight pipe) is stacked in my head.
Elias
Too expensive for me. For this reason I buy CHP-90
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Nandappe have said that the CHP-90 is very close to the sound of the Alpair 10Maop so I hope they sound good. The treble might sound better with these because I've heard on youtube that it can be that way. You can't trust it but I thought so.
If you consider the price of the Alpair CHP-90 which is less than half of the Alpair 10Maop, it is almost a bargain if true.
You really can't know if you don't try by yourself. It is a hobby for deep pockets 😢
Oh yes, you will have to tell us how they compare!
After reading all this (teasing!) thread about MAOP 10.2 in MiniOnken... I really would like to know if I need to upgrade asap from the CHP I just bought!!!
The double price difference is not a real problem but I like the bangs for bucks!!!😉
And, just out of curiosity... what about this Planet10 MarKen??? Your 10P MiniOnken is really different??? A custom build?
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That picture is the one that most resembles my MiniOnken. 6 ports to be calculated for different drivers. The volume is also important. There you see the conical shape in the depth which helps to reduce resonances.
A little more difficult to build with these angles. But believe me, it's worth it.
If I decide to build them with miniOnken, I have to ask planet10 to do plans for them. Which of course takes longer time.
Do you think CHP-90 will make for good satellites for a surround system (both for music and movies)? And maybe mains as well? I'm thinking a closed box for the surrounds, would be great if it could play down to 100-120 Hz with a digital EQ boost of 3-6 dB. I wonder what's the minimum volume for that (with stuffing, of course).
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Closed box 7 litre give 100hz - 3db
Closed box 3 litre give 100hz - 6db
All right. Lets make the enclosure 14~15 lts and pair it with
SB Acoustics SB15SFCR-00 5'' x 8'' Passive Radiator
orDayton Audio Epique E180HE-PR 7" Carbon Fiber Cone Passive Radiator
KEF did it successfully . EXCEPT IFthere is some kind of allergy to passive radiators .
I have the experience of such an enclosure ( 6" woofer + 6" passive radiator + twitter) and the sound was very good but "the stage" not extremely accurate (wide, not flat but has not enough "depth")
Elias
OK Elias... also this can be a way!
Me, I think I prefer leaving the fullrange alone, if the box is well done I can certainly be satisfied by the bass and I don't need a PR.
I think at the moment I'll be testing a 20L Onken with 3 small ports in the upper and lower side!
Here a calculation I've made...
Who knows! Maybe they'll sound great!
Edit PS: but woodworking not today! because there is the AudioVideoShow in Warsaw where I'm now 😉 so I'll not miss it!!! 🙂
Me, I think I prefer leaving the fullrange alone, if the box is well done I can certainly be satisfied by the bass and I don't need a PR.
I think at the moment I'll be testing a 20L Onken with 3 small ports in the upper and lower side!
Here a calculation I've made...
Who knows! Maybe they'll sound great!
Edit PS: but woodworking not today! because there is the AudioVideoShow in Warsaw where I'm now 😉 so I'll not miss it!!! 🙂
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Onken and MiniOnken the opposite of each other.
Just want to say that in all fairness. But you might like that sound so go for it. The MiniOnken tightens up the sound and gives a straighter frequency curve, while the Onken goes deeper and uneven frequency curve.