Really hard and awesome work here and im sure a great and extraordinary results will be achieved and possibly never before seing at least with such a small speaker horn based.
The project was a speaker bookshelf format ... right?
I see impresive 3D print from X and I was amazed.
I just wanted to point a few ideas that might (or not) could be used for something ...
Would not it be more convenient for the holes wofers (bandpass) on adapter mount to horn were based upon a certain angle (15 to 30 degrees) orientation toward the mouth of the horn to avoid perpendicular to the "blow" of the wofers within the horn ?
Seeing all the designs Unity and Sinergy is common guide angled wofers toward the mouth (usually by simply installing them parallel to the walls of the horn) although in this case this can make unequal distances between the sides of the holes for wofers could introduce some additional diffraction problems, but I think with such short distances will be really minimal for LF (at least irrelevant) and squareness firing wofers consider whether that may adversely affect multiple aspects of the overall frequency response and phase the entire assembly.
In any case the data is the data and all analtics I see here about the build progress (Bush and X) seems for me are really good and I'm sure this building has all the "pedigry" to be unique in its kind.
My best wishes to all,
Cheers
PD: I'm in the dark side and since child I am a fervent disciple of Darth Vader.
Visit the array of Wasayso and see yourself and understand the infinite power of the Force that sure drag you to the most depths of his realm forever.
That The Force remain on you 😀
The project was a speaker bookshelf format ... right?
I see impresive 3D print from X and I was amazed.
I just wanted to point a few ideas that might (or not) could be used for something ...
Would not it be more convenient for the holes wofers (bandpass) on adapter mount to horn were based upon a certain angle (15 to 30 degrees) orientation toward the mouth of the horn to avoid perpendicular to the "blow" of the wofers within the horn ?
Seeing all the designs Unity and Sinergy is common guide angled wofers toward the mouth (usually by simply installing them parallel to the walls of the horn) although in this case this can make unequal distances between the sides of the holes for wofers could introduce some additional diffraction problems, but I think with such short distances will be really minimal for LF (at least irrelevant) and squareness firing wofers consider whether that may adversely affect multiple aspects of the overall frequency response and phase the entire assembly.
In any case the data is the data and all analtics I see here about the build progress (Bush and X) seems for me are really good and I'm sure this building has all the "pedigry" to be unique in its kind.
My best wishes to all,
Cheers
PD: I'm in the dark side and since child I am a fervent disciple of Darth Vader.
Visit the array of Wasayso and see yourself and understand the infinite power of the Force that sure drag you to the most depths of his realm forever.
That The Force remain on you 😀
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Most of it is the full range top of coarse. 25 drivers help to get a nice clean ridge in those early plots. So I wanted to see if there is a change using 2 woofers.
Here's my mid frequencies after changing the damping layer (to butyl rope) between my 2 aluminium baffle plates:
Prior result:
That difference was clearly audible. Like using Cleanex on your window into the recording.
Since then I've managed to get it down a bit more in processing with a change in settings of my FIR filters.
Note my scale is ~30 dB down from average to get a clear view.
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In fact, the bandpass holes on my horn are angled forward at 26 deg rather than perpendicular to the axis of the horn. This is just natural result of woofer being mounted on plate at 26 deg. So yes, the flows do get a bit of forward push.
OK X then perfect.
Seemed to me another thing while watching your pic about 3D print model.
Sorry is time for I shut up !
X I'm so eager to see (and hear if possible) your progress and the Bush build.
Wonderful project.
Regards
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Unfortunately, the woofer mount adapter could not be salvaged. I will have to print a new one but will improve the design a bit and adjust the print settings, hopefully for a better print this time around. Most problems can be caught within the first 3 to 10 layers so I will have to pay better attention.
bushmeister,
Thanks group delay plots the one running one leg only is some special with ripple that at five frq points is faster than tweeter or even faster than real time, had not thought of wrapped in some blankets create FIR EQ 🙂.
New dual woofer looks good and close to pure electric filter textbook as below.
xrk971,
Sorry to hear about 3D print ended discarded your plan look very pro, cross finger next print.
cookiemonster77,
Initial angles PH-4528 below.
Thanks group delay plots the one running one leg only is some special with ripple that at five frq points is faster than tweeter or even faster than real time, had not thought of wrapped in some blankets create FIR EQ 🙂.
New dual woofer looks good and close to pure electric filter textbook as below.
xrk971,
Sorry to hear about 3D print ended discarded your plan look very pro, cross finger next print.
cookiemonster77,
Initial angles PH-4528 below.
Attachments
The new printer settings are working out much better. I have never seen such a high quality first layer before - difference is night and day. I have higher hopes that this one will work. For those interested in printing with PLA on heated glass bed, use 50:50 PVA/water mixture brushed onto glass at 50C. Then heat bed to 68C and nozzle to 225C, print first layer at 40% speed, no fan. Then slowly cool bed to 55C over 5 layers. I still have to see if this doesn't warp but no cooling fan may be the key here.
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Wow X, amazing work. I have no doubt you will get this sorted soon! Can't wait to see it fitted!
I have decided to go ahead and get some high quality ply, I am hoping the weather will improve then I will get the table saw out...
I have decided to go ahead and get some high quality ply, I am hoping the weather will improve then I will get the table saw out...
FLua,
Because have a quad of 90dB 8" Monacor SPH-210 laying around start with them, they seem practical for application in sealed only need 10,55 liter and less when stuffed to have a Q of 0,7 at around 82Hz point. Admit think of bushmeisters impressive distortion plots, but lets see how SPH-210 works with sealed back and a resonance box at front.
Because have a quad of 90dB 8" Monacor SPH-210 laying around start with them, they seem practical for application in sealed only need 10,55 liter and less when stuffed to have a Q of 0,7 at around 82Hz point. Admit think of bushmeisters impressive distortion plots, but lets see how SPH-210 works with sealed back and a resonance box at front.
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Good news so far, 146 minutes left but the print quality has far exceeded my expectations. This is the best print quality I have ever achieved thus far at any size. Absolutely no warping or peeling, surface quality is smoother with no blemishes or 'zits', feature quality is fine and precise. Absolutely beautiful. I have no fear of overnight 'Big Prints' anymore. 😀
Can't wait to fit it to horn. Wondering what is best way to cut horn wall - maybe use adapter to provide outline then cut with Dremel or even jigsaw? The horn is thin ABS and cuts easily.
For a box, I may break down and gave to get ply as well. The 1in thick XPS foam is too bulky and not befitting of a "bookshelf" speaker. Trying to keep it at a little above 9.5in maybe 10in wide baffle, height will be a little more than horn width dimension to accommodate woofers so maybe 18in?
Can't wait to fit it to horn. Wondering what is best way to cut horn wall - maybe use adapter to provide outline then cut with Dremel or even jigsaw? The horn is thin ABS and cuts easily.
For a box, I may break down and gave to get ply as well. The 1in thick XPS foam is too bulky and not befitting of a "bookshelf" speaker. Trying to keep it at a little above 9.5in maybe 10in wide baffle, height will be a little more than horn width dimension to accommodate woofers so maybe 18in?
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Byrtt,
Those Monacors are nice at 90dB! Should work well. In look, they sort of resemble the DC200's I plan on using except polycone vs paper cone?:
Monacor SPH-210:
An externally hosted image should be here but it was not working when we last tested it.
DC200-8:
These are also nice, mivoc.
https://www.mivoc.com/gs/index.php?cat=c82_Einzelchassis-Einzelchassis-82.html
and these wideband with a qts 0,32 for just 39 euro
https://www.mivoc.com/gs/media/products/11803580_FR358N-Datenblatt_C.pdf
I have make a adaptor for my horn, I go make it round on thoat also, round to square so to say, it is easy.
The dampingsring go on it right below the surround as you guys did, I am curious of what this will do.
regards
https://www.mivoc.com/gs/index.php?cat=c82_Einzelchassis-Einzelchassis-82.html
and these wideband with a qts 0,32 for just 39 euro
https://www.mivoc.com/gs/media/products/11803580_FR358N-Datenblatt_C.pdf
I have make a adaptor for my horn, I go make it round on thoat also, round to square so to say, it is easy.
The dampingsring go on it right below the surround as you guys did, I am curious of what this will do.
regards
Attachments
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They are a bit longer than I anticipated - although I recall the model was not very sensitive to this - it actually pushes the bass extension lower. I will make a volume filler plug that matches the cone profile to reduce the volume of the band pass chamber to push the HF extension higher.
I guess I should run a sim with the new port lengths to make sure it is all good.