I was wondering how store subwoofers can achive super deep bass for such a low price with minimal enclosure. For example svs sb 1000 pro declars to hit 20hz -3 which seems quite off with that size. Other example would be emotiva rs 13 which is ported but they delcare 16hz -3 with again small driver. When I tried simulating some drivers in enclosers for example 18" ultimax which got quite high xmax it still requires huge ported box to get down to that sub 20hz. And sealed has problems below 25hz and it's still big.
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Store bought subwoofer specification by producent.
- Thread starter wadimek11
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DSP. As long as you have enough amplifier power and driver excursion, you can arbitrarily change frequency response.
Of course, that does become a problem as your turn up the output. Many subs have a limiter/compressor that will taper off the deep bass at high volume. Necessitating either a bigger sub, or multiple subs to avoid that behaviour.
Of course, that does become a problem as your turn up the output. Many subs have a limiter/compressor that will taper off the deep bass at high volume. Necessitating either a bigger sub, or multiple subs to avoid that behaviour.
staticV3
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From what I can tell, SVS only claim ±3dB 20-270Hz for the SB-1000 Pro, so even if it was 6dB down at 20Hz, that would still be technically in spec.
Here's the SB-1000 Pro's ground plane frequency response as measured by Audioholics: Link
However, as alex-z said, stock FR is pretty meaningless for subs, as you will (should) EQ then anyway.
Here's the SB-1000 Pro's ground plane frequency response as measured by Audioholics: Link
However, as alex-z said, stock FR is pretty meaningless for subs, as you will (should) EQ then anyway.
Frequency response deviations for subs are useless without the giving the reference level of the test. In the case of the SVS PB-1000 Pro, it seems the curve is measured at 90 dB SPL.
90 dB SPL at the very low end of our audible frequencies is not very loud. This is the equal loudness contour from Wikipedia. At 20 Hz, 90 dB SPL is only ~20 phon (perceived to be as loud as a 20 dB 1 kHz tone).
An excellent source of subwoofer data is @sweetchaos' subwoofer comparison spreadsheet. If you compare the SVS PB-16 Ultra to the PB-1000 Pro, you can see that the max SPL at 20 Hz is 117 dB vs 91 dB. In terms of loudness, it is almost 80 phon vs 20 phon, which is a huge difference (every 10 phon sounds about twice as loud).
90 dB SPL at the very low end of our audible frequencies is not very loud. This is the equal loudness contour from Wikipedia. At 20 Hz, 90 dB SPL is only ~20 phon (perceived to be as loud as a 20 dB 1 kHz tone).
An excellent source of subwoofer data is @sweetchaos' subwoofer comparison spreadsheet. If you compare the SVS PB-16 Ultra to the PB-1000 Pro, you can see that the max SPL at 20 Hz is 117 dB vs 91 dB. In terms of loudness, it is almost 80 phon vs 20 phon, which is a huge difference (every 10 phon sounds about twice as loud).
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