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Old 11th July 2010, 02:40 PM   #1
sekhar is offline sekhar  India
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Question one or multiple subs ????????????

I was thinking what is better ............ a single 18 inch sub or multiple 8inch or 10 inch subs ...... which will be louder ???????
I have a 500W amp
which configuration can reach lower frequency limits say may be 5-10hz .....
I am gonna use sealed boxes as they r easier to design.....
help me out





regards
sekhar
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Old 11th July 2010, 02:58 PM   #2
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If you can have multiple subwoofers in separate room locations you should have smoother deeper bass.
But if your 8" sub is not capeable of deep bass (kind of dependent on multiple factors including cabinet size, driver specs, you may be better off with one larger unit.
I use a Vandersteen sub, and it has three 8" units in it. It has very tight deep bass.
Paul
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Old 11th July 2010, 03:07 PM   #3
sreten is offline sreten  United Kingdom
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IMO the best compromise is two sub boxes driven by a single amplifier, placing
one around a 1/3 along the side wall, the other a 1/3 along the back wall.
YMMV but each sealed sub is probably best built with two drivers on opposite
faces the so called "force cancelling mode". So look at 4 good 12" drivers.
Loads of choices for 12"ers. Ignore the driver power ratings, look at Xmax
and the power needed to reach Xmax, you want around 150W per driver.

/Sreten.
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Old 11th July 2010, 04:03 PM   #4
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Quote:
Originally Posted by sekhar View Post
I was thinking what is better ............ a single 18 inch sub or multiple 8inch or 10 inch subs ...... which will be louder ???????
I have a 500W amp
which configuration can reach lower frequency limits say may be 5-10hz .....
I am gonna use sealed boxes as they r easier to design.....
help me out





regards
sekhar
Having a given cone area neighboured will give you a better radiation
resistance and - nominally - better efficiency.

In a real room you are - always - better of, when exciting the room
in multiple positions, so you can flatten out the excitation of
room modes. In the end this variant will subjectively sound more
"solid" and balanced.
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Old 12th July 2010, 03:32 AM   #5
Upfront is offline Upfront  Australia
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I use stereo 12" subs. One directly under each main speaker. Smooth and deep and very accurate. Multipule drivers in multiple locations is the way to go.
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Old 12th July 2010, 06:18 AM   #6
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Ye Shekhar, I would recommend you to go for multiple woofers. But If possible keep cone area as large as possible.

also because u want low response down to 5Hz I would recommend you to read this thread. Click here
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Old 12th July 2010, 06:52 AM   #7
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Would even an 18" subwoofer reach 5Hz, or would you need lots of those?
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Old 12th July 2010, 05:41 PM   #8
sreten is offline sreten  United Kingdom
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Hi, Fasten your seatbelts, we are entering the silly numbers zone, /Sreten.
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Old 12th July 2010, 05:44 PM   #9
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Quote:
Originally Posted by chris661 View Post
Would even an 18" subwoofer reach 5Hz, or would you need lots of those?
I once built a ribbon tweeter, which could easily reach 5Hz.
If you like i will post a picture.
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Old 12th July 2010, 06:27 PM   #10
Glowbug is offline Glowbug  United States
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10Hz is doable...but still massive
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