Thread: In room, real-world measurements of my Harbeth 30.2s

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 response 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 measurments 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.

Originally Posted by 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 response 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 measurments 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.

Doubt thats anywhere near accurate , drag those speaker outside and do a few GP measurement to compare curves ..!


Regards

Measurements must be the scientist and the inner audiophile needing some confirmation?

The Harbeth 30.2 are indeed very enjoyable speakers and I enjoy my pair daily as a music lover. Never once thought about measuring them.

Originally Posted by TheOctopus

Measurements must be the scientist and the inner audiophile needing some confirmation?

Nah, just a bit bored at home and wanted to tweak the settings on the REL sub to be optimal for the Beths. The sub was originally set up using a DOE for the big Dyns and I just wanted to tweak its settings for the 30.2s, as I had never done that since getting them in 2019.

The reason I couldn't do that was my 10 year-old M-Audio USB mic preamp I need to use with my old Dayton EMM-6 no longer works with Audio Midi; it simply doesn't recognize it on the current Mac OS. So, I couldn't do any proper setttings adjustment until I got the new NIST-traceable calibrated MiniDSP UMIK-1 USB-powered mic. It was inexpensive, only 89 bucks from Parts Express. No need for a mic preamp anymore.