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Sub in-room response curve

post #1 of 2
Thread Starter 
For others to view as a point to compare with, here is my in-room curve of the bass response:


Test environment:
  • RS Digital SPL Meter
  • HT Shack's manual sub calibration worksheet
  • HT Shack's test tones (14Hz to 111Hz, 1/6th octave)
  • Denon 3312
  • PB12-NSD sub
  • Definitive Tech SM65 mains on 26" stands
  • 16x18x9 room, with front stage centered along the long wall (~2600 cubic feet)

The sub is along the short wall to the left of the listening position, about a foot from the left wall, front baffle is about 6' from the front wall, and about 8' from the back wall. Both the SM65's were on and crossed at 80Hz. Audyssey dynamic EQ was enabled and volume on the AVR set to -29db. Measurement taken from RS digital SPL meter mounted on a tripod at the listening seat.
post #2 of 2
A frequency response is more valuable with Dynamic EQ disabled. Based on my personal experience, the radioshack spl meter used as a mic (incl calibration file) is not very accurate under 20-30hz. My Empire appears to get a decent response down to 12hz with a RS meter; my CSL mic revealed it actually rolls off pretty good at 20hz. My RS meter was very accurate over that 20-30hz range though so I imagine the rest of your response is right on (of course it's skewed by DEQ though).
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