Which Sub Woofer is Good ? How To Choose - diyAudio
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Old 18th May 2010, 07:55 PM   #1
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Default Which Sub Woofer is Good ? How To Choose

I am listing few drivers from different Vendors , please let me know which to choose .
1> Response 20-1000Hz > 2+2 4Ohm Coil > 12" 200W RMS
2> Response 20-1000Hz > 4 OHm Coil > 12" 200W RMS
3> Response 18-300 > 4 Ohm Coil > 12" 250W RMS

Please let me know which to choose and why ?

I will be using driver for subwoofer , i will tune my enclosure to get flat response down to 10Hz !
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Old 18th May 2010, 08:33 PM   #2
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All woofers have certain sets of numbers associated with their characteristics.

If you want to see how low each will go, use a bass response modelling program (winISD is good), and try putting each set of numbers in (we call them Thiel-Small parameters, after the scientists that invented them). See what you can get out.

Chris
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Old 18th May 2010, 08:36 PM   #3
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Quote:
Originally Posted by chris661 View Post
All woofers have certain sets of numbers associated with their characteristics.

If you want to see how low each will go, use a bass response modelling program (winISD is good), and try putting each set of numbers in (we call them Thiel-Small parameters, after the scientists that invented them). See what you can get out.

Chris
but criss manufacturer has not given any detail about Ts parameter on their site ! that's why i thought asking here would help me . i do not own the driver but i have to buy it !
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Old 18th May 2010, 09:06 PM   #4
badman is offline badman  United States
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Those numbers are not sufficient to judge the best driver. I'd go with #3 if I had no other information available, it would possibly go deeper and handle more power but need a bigger box. All is speculation until a full spec set is seen though.
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Old 18th May 2010, 09:11 PM   #5
godfrey is offline godfrey  South Africa
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Do you have the names of them, or pictures?
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Old 18th May 2010, 09:23 PM   #6
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All those who need the driver names : Here i go

Sony XSL120P5A
Pioneer TSW304
Pioneer TS-W1208D4
Kenwood KFC-W3000L
JBL REF 12060W
JBL GT5-S12

Now ? Which one to choose ?
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Old 18th May 2010, 11:28 PM   #7
MaVo is offline MaVo  Germany
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I say choose the most badass locking one...

... if you dont want good sound.
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Old 19th May 2010, 12:39 AM   #8
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Default 10 Hz??

Trying to achieve a flat response down to 10 Hz is going to be very difficult.
The drivers you have selected are most likely of the Auto sub genre'. This being so your selections are all wrong. These are commercial brands that are marketed toward the kids with the obnoxious sounding cars. The stated specifications are rather meaningless without any supporting specifications.
The auto drivers are geared toward moving the most amount of air without any attention to distortions or non-linearities. The extreme excursions of said drivers really do sound terrible at the lowest of frequencies. The most likely reason these brands do not publish any T/S specifications is that they would be "railed" by the "Hi-fidelity" crowd.......as in US!
A tuned port box for such low frequencies would be around the size of two full-size freezers.....5 feet wide, 6 feet high, two and a half feet deep.........
Please reconsider trying for 10 Hz flat.

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Old 19th May 2010, 04:10 AM   #9
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Default Found better for you!

I found a brand with some of these TS specs for you to give you an idea.
It is a "Vifa" brand subwoofer 12" Diameter..
Volume of a ported box at 3.704...cubic feet
"Tuned frequency" of the box at 24.102...Hertz
"Cutoff" frequency( Down 3 Decibels) at 26.797...Hertz
A pair of these set-up by doing the math will get you down there...but 10 Hertz?...won't go that low...& besides you can't hear that frequency anyway.

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Old 19th May 2010, 05:00 AM   #10
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1) You need to get the TS for the drivers at any cost if you seriously want to design a good Subwoofer.

2) Based on TS decide if the driver is suitable for Sealed enclosure or ported. you seem to be a a bit new for designing. so I would recommend you to go for sealed enclosure as this design is error tolerant.

3) Once you get Ts you can use free version of WinIsd to design. ( But I would advice you to do more homework before you just use the tool. understand importance of each parameters.

4)Don't run to get flat response down to 10Hz. Rather I would advice you to use subsonic filter and limit cone excursion.


Previously when I googled for drivers available in India I found Vifa is available with some stockist/ dealers. you will sure get Vifa's Ts on net.
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