Most efficient and flat 12" sub like the SB Acoustics

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spice house

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#1
Can anyone recommend the most efficient and flat subwoofers like these? As flat as possible down to 20hz, and 'reasonable' response to 1khz.

SB Acoustics SB34NRX75-6
SB Acoustics :: 12" SB34NRX75-6

and

Scan Speak 32W/4878T00
http://www.scan-speak.dk/datasheet/pdf/32w-4878t00.pdf

I have used the SB in designs to great effect: flat to 30hz, and -5db at 20hz. I would like to know if there is a better driver with equal or greater sensitivity that anyone knows of. I have approximately 140L of space available.
 
#2
spice house said:
Can anyone recommend the most efficient and flat subwoofers like these? As flat as possible down to 20hz, and 'reasonable' response to 1khz.
Click to expand...

Hi SH,

I just saw your question... just for clarity, why ask 'A sub-woofer' (or any other frequency specific driver) to extend from 20hz to 1000hz? A sub isn't designed to be a full range driver, nor a full range driver... "a sub"; kinda like asking a 'High frequency horn' to ignore the laws of physics and 'somehow' reproduce the bass as well as the upper-end of the audio spectrum. Whenever planning a new sub, I'll choose a driver that has a 'Three and a half' octave range within the desired passband; allocating it to the very lowest frequency that the planned enclosure will support. This is why we use a 'dividing network' (cross-over); to partition the original full-range signal, and then direct those signals to their proper speaker designations.

By over extending a driver's frequency range (High and low freq), you reduce that speaker's 'much coveted', natural efficiency and capacity to reproduce it's 'particular' range of design. By focusing (narrowing) the driver's natural passband, we reap a great deal of efficiency in that driver's capability; resulting in less power needed, cooler motor assm, lower power compression, and an overall cleaner sound! Best to you!
 
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#4
Thanks guys. Interesting, never seen the Visaton TIW before.

Yes rigtec, I'm well versed in speaker design. It will be not be used anywhere close to 1k. If you look at the examples I used above they have the 'reasonable' response to 1k I am speaking of. Obviously flatness and high sensitivity in the lower octaves is what is important here.
 
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