My DIY Subwoofer -Focal 30a1 - diyAudio
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Old 7th May 2008, 03:48 PM   #1
bego2 is offline bego2  Croatia
diyAudio Member
 
Join Date: Aug 2007
Default My DIY Subwoofer -Focal 30a1

Heloo. I`m new in diy audio...i have bought focal 30a1 subwoofer for car audio...

specs
http://img.w3dizajn.net/images/specasbc.jpg

I used chipboard 18mm, it`s cheaper and still good..The box is tuned to 50hz whit this port and has 45,210L.

Pics of "project", sorry but pics are mixed up

http://img.w3dizajn.net/images/100_2296kcr3.jpg
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http://img.w3dizajn.net/images/P1000018tci8.jpg
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http://img.w3dizajn.net/images/Slika00339in.jpg
http://img.w3dizajn.net/images/untitledqjr2.jpg

psu and amplifer. amplifer is kenwood kac626 for car. i used an psu power supply for computer it`s chiftek 400w... on 12V it has 25A but i don`t believe.

http://img.w3dizajn.net/images/100_2972si0z.jpg
http://img.w3dizajn.net/images/P1000020fxpj.jpg
http://img.w3dizajn.net/images/P1000021r0du.jpg
http://img.w3dizajn.net/images/P1000091i3el.jpg
http://img.w3dizajn.net/images/P1000093zvvs.jpg

For finish i use cotto veneer and oak lacquer i think. The bass i bad meening good. I can`t stand next to him

I`m thinking to make a low pass active filter...but i have time later...

So what do you guys think?
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Old 7th May 2008, 05:29 PM   #2
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
http://www.top-sound.it/doc/prodotto...oofer-30A1.pdf

Fs 37.4 Hz
Vas 52.97 I
Qts 0.42
Qes 0.45
Qms 6.37
Re 3.2 ohms
Sd 510.71 cm2
Cas 3.77E-07 m5/N
Mas 48.02 kg/m4
Ras 1771.39 ohms.ac
Cms 1.45E-04 m/N
Mms 125.24 g
Rms 4.62 kg/s
Ces 598.43 mF
Les 30.26 mH
Res 45.3 ohms
BI 14.47 N/A
SPL 89.73 dB/W/m

Hi, for 45L vent tuning at 50Hz is far too high, 30Hz to 33Hz IMO, /sreten.
Attached Images
File Type: jpg guff.jpg (91.9 KB, 242 views)
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Old 7th May 2008, 06:19 PM   #3
Vivek is offline Vivek  India
diyAudio Member
 
Join Date: Nov 2000
Location: Bangalore, India
Great job. I have made subwoofers for HT with two Infinity car sub drivers. I could try what you have done.

Vivek
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Old 7th May 2008, 07:15 PM   #4
bego2 is offline bego2  Croatia
diyAudio Member
 
Join Date: Aug 2007
yes, yes. i forgot to say. The box should be tunned for 34hz but i didn`t found appropriate bassrefleks, i will extend existing bassrefleks with plastic water pipes.
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