[Puma Cat]

Got my new Dayton NIST-traceable calibration USB mic today from MiniDSP today. Only $89. Measurements are now easier as I don’t need to use the M-Audio mic preamp anymore, just plug in to a USB port and go.

With that, I decided to do some in-room measurements of my Harbeth 30.2 40th Anniv speakers using REW 5.20. The responses were based on where I had previously set the controls my REL R-305 to integrate with my larger Dynaudio Contour S3.4s back in the day, so the sub has not been "optimized" for the 'Beth. I just plugged in the mic, attached the output cables and measured both the L and R channels from one of my reference listening positions (the quasi-nearfield equilateral triangle listening position). The mic was set at 90° (vertical) and the height was at my ear level. All measurements of positions of the speakers to the front wall, toe-in, and mic positions were measured using a laser tape measure. The 90° mic calibration file was used as the reference mic file. Target SPL was 74 dB, which is about as loud as I ever listen.

Shown here are the individual left and right Harbeth 30.2 frequency response plots in REW, using 1/3 octave smoothing. Red is the right channel, Green is the Left channel.


This plot depicts the L and R channels "averaged" in REW. Still using 1/3 octave smoothing.


Overall, not bad. I'll likely go back and tweak the settings on the sub a bit, but pretty pleased with how close this is out of the box, so to speak.

Overall, the 'Beths are pretty smooth across the board.