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SVS PB-2000 Subwoofer Review & Measurements


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SVS PB-2000: Measurements
Brent Butterworth

Frequency Response
17 to 165 Hz ±3 dB

Crossover Low-Pass Rolloff
-24 dB/octave

Max Output          CEA-2010A           Traditional
                             (1M peak)              (2M RMS)
40-63 Hz avg       119.7 dB              110.7 dB            
63 Hz                     120.5 dB               111.5 dB
50 Hz                     119.5 dB L             110.5 dB L
40 Hz                     119.1 dB L             110.1 dB L
20-31.5 Hz avg    116.3 dB               107.3 dB
31.5 Hz                  118.6 dB L             109.6 dB L
25 Hz                     116.6 dB L             107.6 dB L
20 Hz                     112.8 dB                103.8 dB

The above chart represents the measured frequency response of the PB-2000 with the crossover frequency set to maximum (green trace) and 80 Hz (purple trace). I measured this response by close-miking the driver and port, scaling the port measurement and summing it with the port measurement. My tools were an Audiomatica Clio 10 FW audio analyzer and MIC-01 measurement microphone.

I did CEA-2010A measurements the same way as the SB-2000, using an Earthworks M30 measurement microphone, my M-Audio Mobile Pre USB interface and the freeware CEA-2010 measurement software developed by Don Keele, which runs on the Wavemetric Igor Pro scientific software package. I took these measurements at 2 meters peak output, then scaled them up to 1-meter equivalent per CEA-2010A reporting requirements. The two sets of measurements I have presented here -- CEA-2010A and traditional method -- are functionally identical, but the traditional measurement employed by most audio websites and many manufacturers reports results at 2-meter RMS equivalent, which is -9 dB lower than CEA-2010A. An L next to the result indicates that the output was dictated by the subwoofer's internal circuitry (i.e., limiter), and not by exceeding the CEA-2010A distortion thresholds. Averages are calculated in pascals.

These are excellent output measurements for a 12-inch, $799 subwoofer. They fall roughly -4 to -6 dB shy of what I've measured from the very biggest and best subs, but the evenness of response and output throughout the sub's operating range is impressive, and the output is probably as much as even many serious home theater enthusiasts can use.

At 20 Hz, though, it does have some port noise on the CEA-2010A test. You probably won't hear this because there's so little 20 Hz content in music and movies, but with the CEA-2010A 20 Hz test tone, it sounds like a wheezing elephant.


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