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Old 5th November 2008, 02:29 AM   #1
66Panel is offline 66Panel  Canada
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Default Subwoofer

Hello All,

I would like to build my first subwoofer something like Zaph did a while back with using the MCM 55-2185 8" Dual Voice Coil Woofer & the MCM 50-6272 100 Watt Subwoofer Amplifier Module or the MCM 50-6263 200 Watt Subwoofer Amplifier Module.

I like the size of the box that Zaph made but I dont know what the dimensions are or how big to make the box, any advise would be greatly appreciated.

Thank you,

66Panel
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Old 5th November 2008, 02:37 AM   #2
Thawach is offline Thawach  Thailand
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66Panel,why don't u use win isd to simulate the size by yourself?/
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Old 5th November 2008, 01:20 PM   #3
66Panel is offline 66Panel  Canada
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Thawach,

This is all very new to me, actually this is my first DIY. This win isd I assume I can download somewhere and input the specs from the woofer?
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Old 5th November 2008, 01:49 PM   #4
Thawach is offline Thawach  Thailand
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hi!66Panel

u can download from this. about input the parameter please u see the help menu on this program.

http://www.linearteam.dk/

/Thawach
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Old 6th November 2008, 04:31 AM   #5
66Panel is offline 66Panel  Canada
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Hi Thawach,

I will try this program on the weekend.

Thanks,

66Panel
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Old 13th November 2008, 12:58 PM   #6
sreten is offline sreten  United Kingdom
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Hi,

An extended bass alignment would be a 25L box tuned to 30Hz.
this has the same -6dB point as 19L/49Hz "flat" tuning.
A sub amplifier with 5 or so dB boost @ 30Hz should work.

/sreten.
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Old 14th November 2008, 01:54 AM   #7
66Panel is offline 66Panel  Canada
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Hi Sreten,

Thank you for the response, forgive my ignorance as this is all very, very new to me.
From looking at the picture of Zaphs box and from your suggestion of a 25L box I calculate the box would be approximately 11W x 18T x 8D? Would this be a vented box?

Thanks again,

66Panel
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Old 14th November 2008, 07:55 AM   #8
66Panel is offline 66Panel  Canada
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Hello Thawach, Sreten

I loaded WinISd on my spare computer and figured out how and what information to input. Thanks Thawach

Sreten,
I sort of understand what you are saying as I got a very similar printout from WinISD, the box would be 25.5L and the tuning will be 40.24Hz.
I am trying to get my head wrapped around all of this new wealth of information, please bear with me. Looking at the specs of the woofer as compared to the specs of the amplifier has got me confused or maybe I just dont understand? The spec for the 200 W MCM 50-6263 says fully adjustable 12db/octave crossover from 50Hz-120Hz, I still dont understand If I can use this amplifier in this configuration.

Thanks again,

66Panel
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Old 14th November 2008, 10:21 AM   #9
sreten is offline sreten  United Kingdom
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Hi,

Zaph used an amplifier will built in 5dB bass boost, this is not related
to the adjustable roll-off. To follow Zaphs design you need a much
lower port tuning (~30Hz) and built in bass boost.

/sreten.
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Old 15th November 2008, 11:55 PM   #10
Thawach is offline Thawach  Thailand
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Quote:
I loaded WinISd on my spare computer and figured out how and what information to input.
sreten u came here why didn't replace me to reply? u..u.yakz..zzz with my kung fu. sorry! sreten i think i would die with this question why it's difficult to explain.LOL

ok! 66Panel open program then click editor->click parameters->put MCM 55-2185 parameters from this link

http://www.mcmelectronics.com/product/55-2185

then click save(new database for use)


Thanks
TW

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