Topic: Speaker DIY'ers

[fredreadrick]

tyak mabajo it...

Hindi naman, may built-in P-trap ito sir Tony

[tony]

^from Audio Philippines yan.....

[JoeyGS]

Guys, 

Where can I source the following cotton/wool felt?  It the blue foam lining in the photo.

[JojoD818]

Guys, 

Where can I source the following cotton/wool felt?  It the blue foam lining in the photo.

I can't see the photo...

[JoeyGS]

Photo fixed.....

Guys, 

Where can I source the following cotton/wool felt?  It the blue foam lining in the photo.

[JojoD818]

Photo fixed.....

I think I saw this in a canvass supply store in Caloocan, it should also be available in Divisoria. Though the ones I see are not blue but pinkish in color. Will check when I pass by their store.

[tony]

@JoeyGS, meron shell canvass sa pasay, near Gi; Puyat mrt....

[tony]

i met Ed Paman, speaker builder at Dusit in 2011. we are friends since....
here is just a sample of his work....

[JoeyGS]

Thanks Tony for the referral.

Tamang tama I work in Makati and makes it accessible.

@JoeyGS, meron shell canvass sa pasay, near Gi; Puyat mrt....

[tony]

Thanks Tony for the referral.

Tamang tama I work in Makati and makes it accessible.

welcome, i used to buy stuff from them, meron ding branch sila sa cubao....

[remington]

the matching stand more than 20 kls. sand filled

[parasound]

Question lang po sana kung pwede itong Beyma SM115/N sa Onken cabs
http://www.beyma.de/fileadmin/seiten/download/pdf/Beyma_professional/SM115N.pdf


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[parasound]

Latest project, planning to repaint, powder coated or flat black




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[tony]

Latest project, planning to repaint, powder coated or flat black




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textured black powder coating, TB-7005, you have to strip the original paint though,
sandblasting ought to take care of that...

[parasound]

Thanks for the tip sir Tony.


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[parasound]

Help needed, looking for 1 inch Plywood, info naman mga sir kung sino supplier.

Thanks

[Abad Santos 7]

Help needed, looking for 1 inch Plywood, info naman mga sir kung sino supplier.

Thanks

Sir try mo sa Pateco.

Cheers.

[Gino]

Formaply

373-0303 to 05
22 Sct. Santiago st., Bgy Laging Handa, QC

[parasound]

Thank you sir, sana meron available.


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[parasound]

Altec 806 8A




Altec 416 8B




Plywood na lang



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[parasound]

Crossover parts



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[parasound]

Low Frequency Woofer - ok
Horn - ok
HF Compression Driver - ok
Crossover Parts - ok
Plywood - ok
Game.. Wooaaah. Ilang araw na lang.







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[tony]

uy, vintage talaga ang dating.....

i like that baffle, i have a pair of Hukotone vintage 12 inchers...

[parasound]

uy, vintage talaga ang dating.....

i like that baffle, i have a pair of Hukotone vintage 12 inchers...

Yes sir Tony, inspired by Jean Hiraga Onken, day 1 start today.. Fast Track Project Sir Tony. Kailangan matapos agad by Tuesday. Para ma enjoy ko ng kahit 3 days yung speaker, then back to work na ulit.


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[bogart.2006]

Question for the DIYers there...

I only have experience building speaker boxes for car audio applications.  What kind of wood is good to use for a speaker box/enclosure for home audio use?  From my experience in car audio kasi, plywood/plyboard doesn't produce the same sound as an MDF board would

[tony]

birch plywood...

[Gino]

This is the best comment I could find. Thread is here:

http://www.diyaudio.com/forums/multi-way/51746-mdf-v-plywood-construction.html

"When the first mode of an enclosure panel resonance is outside the passband of the drivers in that enclosure, you don't need damping... only stiffness. This is the case with sub enclosures, where panels (should) resonate well above the operating range of the drivers and the goal should be to increase stiffness by any and all means necessary to minimize the amplitude of forced excitation vibrations. Here both MDF and ply can be used, with the first resulting in a heavier enclosure for the same performance. The final cost will likely be fairly similar between the two, with ply perhaps having a slightly smaller finished enclosure for a bit higher cost.

When the first mode of an enclosure panel resonance is within the passband of the drivers in that enclosure, you need both damping and stiffness. This is the case with full-range (or satellite) enclosures, where panels almost unavoidably resonate somewhere within the operating range of one of the drivers. Here the goal should be to increase stiffness as much as possible to minimize the amplitude of forced excitation vibrations, and to maximize damping so that the amplitude at resonance is kept in check as well. This can be accomplished with either MDF or plywood, with the first requiring more bracing or thicker walls for the same result, and the latter requiring more applied damping material liners for the same result. Relatively speaking, since MDF is usually cheaper than both good plywood and good damping materials, and since bracing techniques contribute way more to the overall panel stiffness than either panel thickness or material modulus, it would seem obvious that MDF is the more economic choice. And, with any experience with proven engineering methods, an equally or better performing choice as well.

Since forced excitations are relatively low in amplitude compared to sub enclosures, one should focus most of his efforts on proper damping. Hence, use MDF as a good starting point and spend the extra money (saved vs. ply) on additional damping.

Don't forget that stuffing is also important when the enclosure dimensions become large wrt the lowest wavelength in the passband of the drivers used (i.e., when the enclosure is 1/4 wavelength or larger, as a rule of thumb). This leads to the conclusion that subs don't require stuffing for backwave damping (but might otherwise benefit from the apparent increase in enclosure volume when a lot is used), but fullrange enclosures do require stuffing to dampen internal standing wave resonances.

In my observations, you'll find that the people who think plywood sounds better for fullrange enclosures are the same people who think some resistors sound better, some cables have a preferred direction, some volume knobs (the knobs, not the pots) sound better, etc. Take that for what you will... perhaps they are self deluded about practically everything "golden ear" related, or perhaps they are the ones who really do have good ears and can give the most consistent advice. Depending on which side of the greater subjectivist/objectivist argument you fall, you will either take their endorsement of plywood as an endorsement, or a warning."
    

[redstarrising]

Latest project, planning to repaint, powder coated or flat black




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ayan na inilabas na mga nahukay, mukang approaching na sa game over speaker hehehe. Bilisan mo gawin yan para ma audition agad. Wag mo kalimutan mga request ko kahit DORIAN L-101  hehehe.

[parasound]

Yes Sir Jun, Promise ko kay Hepe yan, wala ng kasunod na project. mabuti na lang nasanay ako sa mga past track project natin dati. Kaya lahat ng project ko puro mabilisan. Tingin ka palagi dun sa forum nila then pag meron ka nakita at decided ka na, reserve agad natin. mabilis bentaha dun, maraming piranha.

ayan na inilabas na mga nahukay, mukang approaching na sa game over speaker hehehe. Bilisan mo gawin yan para ma audition agad. Wag mo kalimutan mga request ko kahit DORIAN L-101  hehehe.

@ Sir Jun meron available - JBL S 101
http://vnav.vn/forum/viewtopic.php?f=35&t=5946&p=2413123&hilit=Jbl+101#p2413123



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[parasound]

Nice post Sir Gino

1st - Stiffener
2nd - Damping
Kaya kahit 1" plywood yung gagamitin ko kailangan pa din ng sitffener at bracing in some areas as per jean hiraga design.

This is the best comment I could find. Thread is here:

http://www.diyaudio.com/forums/multi-way/51746-mdf-v-plywood-construction.html

"When the first mode of an enclosure panel resonance is outside the passband of the drivers in that enclosure, you don't need damping... only stiffness. This is the case with sub enclosures, where panels (should) resonate well above the operating range of the drivers and the goal should be to increase stiffness by any and all means necessary to minimize the amplitude of forced excitation vibrations. Here both MDF and ply can be used, with the first resulting in a heavier enclosure for the same performance. The final cost will likely be fairly similar between the two, with ply perhaps having a slightly smaller finished enclosure for a bit higher cost.

When the first mode of an enclosure panel resonance is within the passband of the drivers in that enclosure, you need both damping and stiffness. This is the case with full-range (or satellite) enclosures, where panels almost unavoidably resonate somewhere within the operating range of one of the drivers. Here the goal should be to increase stiffness as much as possible to minimize the amplitude of forced excitation vibrations, and to maximize damping so that the amplitude at resonance is kept in check as well. This can be accomplished with either MDF or plywood, with the first requiring more bracing or thicker walls for the same result, and the latter requiring more applied damping material liners for the same result. Relatively speaking, since MDF is usually cheaper than both good plywood and good damping materials, and since bracing techniques contribute way more to the overall panel stiffness than either panel thickness or material modulus, it would seem obvious that MDF is the more economic choice. And, with any experience with proven engineering methods, an equally or better performing choice as well.

Since forced excitations are relatively low in amplitude compared to sub enclosures, one should focus most of his efforts on proper damping. Hence, use MDF as a good starting point and spend the extra money (saved vs. ply) on additional damping.

Don't forget that stuffing is also important when the enclosure dimensions become large wrt the lowest wavelength in the passband of the drivers used (i.e., when the enclosure is 1/4 wavelength or larger, as a rule of thumb). This leads to the conclusion that subs don't require stuffing for backwave damping (but might otherwise benefit from the apparent increase in enclosure volume when a lot is used), but fullrange enclosures do require stuffing to dampen internal standing wave resonances.

In my observations, you'll find that the people who think plywood sounds better for fullrange enclosures are the same people who think some resistors sound better, some cables have a preferred direction, some volume knobs (the knobs, not the pots) sound better, etc. Take that for what you will... perhaps they are self deluded about practically everything "golden ear" related, or perhaps they are the ones who really do have good ears and can give the most consistent advice. Depending on which side of the greater subjectivist/objectivist argument you fall, you will either take their endorsement of plywood as an endorsement, or a warning."

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