Hi everyone,
I just got a pair of this new MarkAudio fullrange drivers, the CHP-90 and would like to explore the options and have some advice for a nice build!
There are actually 2 rather interesting plans in the MA website, the Psamathe (some kind of TL) and a double bass reflex named Sycorax.
In another thread, the user nandappe posted a floorstanding TQWT that also seems interesting!
Another option I'm actually evaluating it's a so called "Hyper Bass-Reflex" (website of nandappe) that I would say a mix of ???Transmission Line and BLH??? Am I wrong?
I'm particularly interested on this one because I have now a pair of Dayton Audio RS100-4 in a small TLine adapted from this project named HADO and I have to say that they're really great! as desktop speakers! with really surprisingly great and pleasurable bass!!!
I'm actually testing the CHP-90 in a simple pensil and in a TL I've made, medium size box (45x25x25cm) but not really satisfied yet even because the material I'm using to prototype is styrofoam panels! of 3cm... so not at all acoustically perfect! 😉 but great for modeling!
Any suggestion is welcome! and specifically to nandappe I would like to ask if it is possible to have a plan of an Hyper Bass for the CHP-90 or if the [HB-03] HB-15F (in attachment and linked above) can be fine!
I just got a pair of this new MarkAudio fullrange drivers, the CHP-90 and would like to explore the options and have some advice for a nice build!
There are actually 2 rather interesting plans in the MA website, the Psamathe (some kind of TL) and a double bass reflex named Sycorax.
In another thread, the user nandappe posted a floorstanding TQWT that also seems interesting!
Another option I'm actually evaluating it's a so called "Hyper Bass-Reflex" (website of nandappe) that I would say a mix of ???Transmission Line and BLH??? Am I wrong?
I'm particularly interested on this one because I have now a pair of Dayton Audio RS100-4 in a small TLine adapted from this project named HADO and I have to say that they're really great! as desktop speakers! with really surprisingly great and pleasurable bass!!!
I'm actually testing the CHP-90 in a simple pensil and in a TL I've made, medium size box (45x25x25cm) but not really satisfied yet even because the material I'm using to prototype is styrofoam panels! of 3cm... so not at all acoustically perfect! 😉 but great for modeling!
Any suggestion is welcome! and specifically to nandappe I would like to ask if it is possible to have a plan of an Hyper Bass for the CHP-90 or if the [HB-03] HB-15F (in attachment and linked above) can be fine!
Attachments
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nandappe
Greetings
A question.
model / SDDBH-T13.5R-AD is good for CHP-90mica , or even better ? Of course it is rather. difficult to construct this box but,.... if it can fill the slope below 100Hz I'm thinking to ***** my skills.
Elias
Greetings
A question.
model / SDDBH-T13.5R-AD is good for CHP-90mica , or even better ? Of course it is rather. difficult to construct this box but,.... if it can fill the slope below 100Hz I'm thinking to ***** my skills.
Elias
Any type of DDBH, SDDBH, DDVP, TWTD can be reproduced with sufficient sound pressure up to 50Hz.
Please consider the size, appearance, and difficulty of production when making your selection.
SDDBH-T13.5R-AD is very difficult.
Sorry, I have never used LINUX, so I can't answer your question.
Attachments
About SDDBH I have as a guide this
From your attachment seems to me like DDBH follows as close as possible the source (CD)
Elias
The box on YouTube that Elias introduced is an "Staggered Dual Back-loaded Horn".
It is not a SDDBH (Staggered Dual Back-loaded Horn added Damp-Duct).
If we add an optimal duct to the mouth of the BH, the bass output will change for the better. (DDBH, Back-loaded Horn added Damp-Duct)
Nandappe
Thank you so much for the translated schema!
I couldn't find some way to translate from Japanese to English the content of this schema (maybe a partial translation through my mobile phone by capturing my pc-screen)
Elias
Thank you for the clarification about SDDBH. Yes I missed the difference. My apologies
In the above schema you wrote (bottom line) "TOTAL MOUSE AREA....." ? Do you mean "mouth area" ? Maybe your design https://www.diyaudio.com/community/threads/markaudio-chp-90-mica-ddvp-12-5-ml-tqwt.389031/ it is equally good sounding but much easier construction and maybe I have to follow that.
Elias
according to the data you provided to us for CHP-90mica Sd = 104mm (SD=85cm2 .A little more than 4". So a Passive radiator of ~ 170cm2 (effective piston area) - just Sd=147mm - (something like
SEAS SP18R - H9944 6,5'', or Dayton Audio DS175-PR , or Dayton Audio DSA175-PR ,or .....).
maybe (just maybe) could be a space saving solutionElias
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Quick update after having them playing from 12hrs a day for a week...
After some test they're now mounted into a temporary wooden slot vented box (approx 21x24x42cm), 14L, slot approx 16x2x12 cm.
Compared to the great DA RS100-4 you can hear that they come from another world in terms of clarity and details of the mid/highs but I'm having problems finding the same great bass! that I have with the small TL of the RS100.
I thought I could get a good bass in a 14L but in fact they sound really thin! So strange!!!
Anyone has a suggestion on how to model a TL also for the CHP-90? keeping the box desktop-size? or after the burn-in period the bass will be better?
Today I'll try something else and maybe play with stuffing to see if something change...
LeifB60 any news? And you Elias? Really going to make some SDDBH?
Any advice is really welcome!!! 🙂
After some test they're now mounted into a temporary wooden slot vented box (approx 21x24x42cm), 14L, slot approx 16x2x12 cm.
Compared to the great DA RS100-4 you can hear that they come from another world in terms of clarity and details of the mid/highs but I'm having problems finding the same great bass! that I have with the small TL of the RS100.
I thought I could get a good bass in a 14L but in fact they sound really thin! So strange!!!
Anyone has a suggestion on how to model a TL also for the CHP-90? keeping the box desktop-size? or after the burn-in period the bass will be better?
Today I'll try something else and maybe play with stuffing to see if something change...
LeifB60 any news? And you Elias? Really going to make some SDDBH?
Any advice is really welcome!!! 🙂
Hi. It is possible that the bass is not that strong or that you have not tuned the box optimally. I haven't watched BR yet. I will try to tune them around 54Hz. You can experiment with shorter or longer bass reflex tubes. If you tune them too low, the effect can be less bass or if you tune them too high. Balancing.
I can imagine that if you use the larger boxes that you get a boost of the bass. FHXL I think would fit as well as nandapp's suggestion.
I can imagine that if you use the larger boxes that you get a boost of the bass. FHXL I think would fit as well as nandapp's suggestion.
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Hi, thanks for quick reply!
Yep, maybe u're right and it's really a question of optimal / exact tuning!!!
I want a slot instead of tube so here what WINISD give me (1st time using it but I think shld be fine).
14L, 50hz, slot 2x12,5x17 cm
I'll try be more precise in my model now and I'll post an update...
Yep, maybe u're right and it's really a question of optimal / exact tuning!!!
I want a slot instead of tube so here what WINISD give me (1st time using it but I think shld be fine).
14L, 50hz, slot 2x12,5x17 cm
I'll try be more precise in my model now and I'll post an update...
Attachments
If you want an amplification of the bass, you can raise the selected frequency to 54hz for example. Or a larger box can also do this. Try 20 liters and the same frequency 50hz.
An advantage of bass reflex tubes is that you can make them longer or shorter. You have more opportunity to shape it according to your own sound and your room.
An advantage of bass reflex tubes is that you can make them longer or shorter. You have more opportunity to shape it according to your own sound and your room.
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21,7 L, internal size 17,4 x 30 x 42cm, port 1,8 x 14 x 12,5 cm, tuned at 48hz and yes! already much much better!!!
but still looking for that sweet little spot! 😉 I'll try more and post resx!
And maybe also some pic soon...
but still looking for that sweet little spot! 😉 I'll try more and post resx!
And maybe also some pic soon...
Good.. If you look, you will find what you want.
There are options to change settings. Not everyone likes sound at optimal settings. There are no right or wrong.
Larger box gives deeper bass or stronger bass.
I am sure you will find the right one for you.
14L bass-reflex kit for the CHP-90 is available from a Japanese distributor.
My sitting room can accommodate a pair of floor standers as my main listening enclosures. I will follow Nandappe 's suggestions (SDDBH or DDVP) . He is the most experienced I believe from the participants to both enclosures, but before that I'm waiting the answer from soundimports