Hello everyone.
I'm an old rookie in the design and construction of audio gears. Old because for over 20 years I have been in the "scene" of the audio as passionate amateur builder trying achieve very good audio qualitty but my focus has been exclusively on the study and contruccion of electronic for audio so the "transducers " never have been in my "mint".
New because in the past I'm always have used and runspeaker cabinets from third parties and mainly bought from some comercial reputable manufacturers.
Now I've decided it's time for new challenges creating my own designs and constructions of the speaker cabinets, and to begin after thinking and thinking which could be a good project to start, and mainly what can fit my current skills (almost null) on design and make "physical" construction of the spakers, I believed I could be able to design and build with success something kind of FAST cab.
So I ask your expertise suggestions, tips, options, criticism (please but that not are so hard as to take away my dreams for ever), and any comment you can think.
My idea would be to create a FAST enclosure with a good enough (excel but cheap
) driver Full Range on top in a TL box that achieves with solvency 150Hz on low range and up to 20kHz with enugth flat frequency response on + - 1dB.
To complete the low band spectrum I think it likely would complement a true subwoofer (not just a woofer) that can actually reach 30Hz maintaining the maximum deviation of + -1 dB in the frequency spectrum.
After seeing some whens designs subwoofer I believed I could run a sub PPSL design, although once studied I have not seen any good information about this applied in home design, as teachers of the SLPP subs as DJK, Waltersys, etc .. mainly they have been made constructions for PA, and those who have made designs SLPP for domestic use like Less Hudson, and others diyers have not published results (measures) of their buildings.
But I think I should give it a try or at least make a good preliminary study for this case, until someone of you (or perhaps no one gets) make me change my opinion.
So here I put all the study that I have done so far so that you have to analyze and comment well all that ye believe on (and please repeat not are super bad guys).
There we go:
Some considerations that I have ben are:
- FR driver sensibility have to match PPSL (92db/1W/1m)
- XO cut arround 150 Hz , and maynly on natural roll off frecuency of FR response. To achieve this FS (75Hz) on FR driver need be enougth low to have 1 oct low rom xo frec.
- SAG Calulation for PPSL driver siteon horizontal plane
SAG= Cms*Mms*G 0,00058*0,0307*9,8 = 0,000175m = 0,175 mm
Cms = m/N
Mms = Kg
G=9,8 m/s
%SAG=(SAG mm/XMAX mm)x100 (0,175/9,5)*100= 1,85%
So seems SAG is low enougth from 5% min.
Thats all for now.
Keep wating your coments and recomendations.
Best for all !!
I'm an old rookie in the design and construction of audio gears. Old because for over 20 years I have been in the "scene" of the audio as passionate amateur builder trying achieve very good audio qualitty but my focus has been exclusively on the study and contruccion of electronic for audio so the "transducers " never have been in my "mint".
New because in the past I'm always have used and runspeaker cabinets from third parties and mainly bought from some comercial reputable manufacturers.
Now I've decided it's time for new challenges creating my own designs and constructions of the speaker cabinets, and to begin after thinking and thinking which could be a good project to start, and mainly what can fit my current skills (almost null) on design and make "physical" construction of the spakers, I believed I could be able to design and build with success something kind of FAST cab.
So I ask your expertise suggestions, tips, options, criticism (please but that not are so hard as to take away my dreams for ever), and any comment you can think.
My idea would be to create a FAST enclosure with a good enough (excel but cheap
) driver Full Range on top in a TL box that achieves with solvency 150Hz on low range and up to 20kHz with enugth flat frequency response on + - 1dB.To complete the low band spectrum I think it likely would complement a true subwoofer (not just a woofer) that can actually reach 30Hz maintaining the maximum deviation of + -1 dB in the frequency spectrum.
After seeing some whens designs subwoofer I believed I could run a sub PPSL design, although once studied I have not seen any good information about this applied in home design, as teachers of the SLPP subs as DJK, Waltersys, etc .. mainly they have been made constructions for PA, and those who have made designs SLPP for domestic use like Less Hudson, and others diyers have not published results (measures) of their buildings.
But I think I should give it a try or at least make a good preliminary study for this case, until someone of you (or perhaps no one gets) make me change my opinion.
So here I put all the study that I have done so far so that you have to analyze and comment well all that ye believe on (and please repeat not are super bad guys).
There we go:
Some considerations that I have ben are:
- FR driver sensibility have to match PPSL (92db/1W/1m)
- XO cut arround 150 Hz , and maynly on natural roll off frecuency of FR response. To achieve this FS (75Hz) on FR driver need be enougth low to have 1 oct low rom xo frec.
- SAG Calulation for PPSL driver siteon horizontal plane
SAG= Cms*Mms*G 0,00058*0,0307*9,8 = 0,000175m = 0,175 mm
Cms = m/N
Mms = Kg
G=9,8 m/s
%SAG=(SAG mm/XMAX mm)x100 (0,175/9,5)*100= 1,85%
So seems SAG is low enougth from 5% min.
Thats all for now.
Keep wating your coments and recomendations.
Best for all !!
Attachments
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) that can validate my simulation BassBox attempt I've done with that little 8" Gradient drivers. My sims outputs seems too much good to be true.
