Systems ListSVSPB12-NSD (2012)

Measurement Details

AmplifierClosed Loop
Outside Temperature56 F
Date TestedFeb 23, 2012
Settings & Equalization
  • Volume at maximum
  • Crossover bypassed
  • Phase at 0
  • Power set to On

Notes

As can be seen from the overall test results this is a very well executed unit with no major weaknesses or issues. The response is very flat and extended covering a useful range of 16-250Hz effectively. The digital low pass filter acts in a textbook manner. The tuning is at 20Hz and the combination of the vented 4th order roll off combined with the 4th order rumble filter combine to rapidly roll off the frequencies below 20Hz. This is typical vented subwoofer behavior. The group delay shows well behaved performance until the delay increases near the vent tuning. Again this is typical of a bass reflex system with a rumble filter. Checking the signal tracking ability with high power sine wave measurements shows that the PB12-NSD exhibits excellent bandwidth uniformity up until the limiter intercedes and clamps further output. Just a hint of port compression is in evidence near tuning at the highest output levels. There was just a hint of port noise during these tests in an outdoor setting. The system barely gave any sign of overload even when driven to it's limits. The driver elicited just a slight hint of bloom or wooliness at deep bass frequencies which indicate that distortion was getting high usually. that and the port noise were the most offensive noises made by the PB12-NSD no matter what was thrown at it. Obviously the SVS protections are very effective at preventing any bad noises. The THD and distortion results bear this out with remarkably low distortion levels even at the loudest output levels. THD grows below the tuning of the system but this is expected. Looking at the maximum long term and CEA-2010 peak output levels the PB12-NSD gives a strong performance for it's price class but is not an exceptionally loud subwoofer. It does offer more 16-30Hz power than most of its competitors though. 

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