Mcm 8" 55-2421 Ts parameter - Page 13 - diyAudio
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Old 28th August 2011, 02:53 PM   #121
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Epa, any step by step instruction on building this bass horn
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Old 30th August 2011, 11:41 PM   #122
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Default Template

Time to get down to business. Here is a large print out of the plan to make a template to start building.

template.jpg
Erik check your pm


Thanks

Last edited by kornnylike; 30th August 2011 at 11:46 PM.
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Old 31st August 2011, 12:28 PM   #123
ODougbo is offline ODougbo  United States
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Default 55-2421

I have bought about a dozen of these woofers and made about a dozen cabinets. They are okay, certainty a good deal for the $$ (can be bought on sale for $30). The manufactures did make some improvements on the design a few years ago.
As far a cabinet HUGE, e.g. 2cf, tune vent to 30hz, youll get crazy low bass. However, take it easy on the volume, they can be damage in loud action scenes. I would do not recommend them for car applications.
Id go for the isobaric design (cut the volume in half and theyll handle a lot more power), I did post a couple of pics this morning of the subs Im using, with the 55-2421.
Recently I built two boxes (2 woofers each 4 woofers total), one on each side of the room. The bass is amazing, better than many store bought subs. BTW, the bass is quite strong, even down to 25hz.
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Old 31st August 2011, 01:15 PM   #124
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Quote:
Originally Posted by ODougbo View Post
I have bought about a dozen of these woofers and made about a dozen cabinets. They are okay, certainty a good deal for the $$ (can be bought on sale for $30). The manufactures did make some improvements on the design a few years ago.
As far a cabinet – HUGE, e.g. 2cf, tune vent to 30hz, you’ll get crazy low bass. However, take it easy on the volume, they can be damage in loud action scenes. I would do not recommend them for car applications.
I’d go for the isobaric design (cut the volume in half and they’ll handle a lot more power), I did post a couple of pics this morning of the subs I’m using, with the 55-2421.
Recently I built two boxes (2 woofers each – 4 woofers total), one on each side of the room. The bass is amazing, better than many store bought subs. BTW, the bass is quite strong, even down to 25hz.
Nice work ODougbo, as for me I will be starting building very soon,as soon as Epa supply me with some more templates to make building easier and more accurate.
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Old 2nd September 2011, 03:17 PM   #125
epa is offline epa  Netherlands
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that doesn't sound right .
if u measure the template 11.87 and the 12.78 ,do those sizez measure the same?
if not, they did not do a 1:1 copy ,but a "fit to page" copy
edit/it should be aprox 34"*41"
before you print again,wait til i have the complete plan with all pannels 3/4(also the red one)
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Last edited by epa; 2nd September 2011 at 03:33 PM.
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Old 2nd September 2011, 04:00 PM   #126
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Quote:
Originally Posted by epa View Post
that doesn't sound right .
if u measure the template 11.87 and the 12.78 ,do those sizez measure the same?
if not, they did not do a 1:1 copy ,but a "fit to page" copy
edit/it should be aprox 34"*41"
before you print again,wait til i have the complete plan with all pannels 3/4(also the red one)
Ok I will wait.
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Old 2nd September 2011, 04:06 PM   #127
epa is offline epa  Netherlands
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did they print it right or not?
also can you measure the wood thicknes exactly "slide rule"
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Last edited by epa; 2nd September 2011 at 04:08 PM.
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Old 2nd September 2011, 04:10 PM   #128
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The machine as acting up so the fedex manager print it from photo shop.
That what I heard
I do not know if they edit the file.

Last edited by kornnylike; 2nd September 2011 at 04:17 PM.
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Old 2nd September 2011, 05:03 PM   #129
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Originally Posted by epa View Post
did they print it right or not?
also can you measure the wood thicknes exactly "slide rule"
The wood thickness is a little more than 3/4" about 5/8"

Last edited by kornnylike; 2nd September 2011 at 05:10 PM.
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Old 2nd September 2011, 07:25 PM   #130
epa is offline epa  Netherlands
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Quote:
Originally Posted by kornnylike View Post
The wood thickness is a little more than 3/4" about 5/8"
can you measure with something like this?
usualy 3/4 ply is less~ 0.71"(18mm)
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