Hello!
As mentioned already I recently purchased (second hand) MG27 subwoofers. Before mounting them into the system I wanted an overview of the functionality. I used a sound card, and electrect microphone and an amplifier to make the following measurement. The measurement software runs on a normal PC. The MG27 crossover was set to full range. The microphone was about 20cm away from the speaker. The measurement was done in my living room. It fits quite well with the curves in the articles. Its not a reference measurement, but still reflects the bass linearity. And its 30 years in-between :D
As mentioned already I recently purchased (second hand) MG27 subwoofers. Before mounting them into the system I wanted an overview of the functionality. I used a sound card, and electrect microphone and an amplifier to make the following measurement. The measurement software runs on a normal PC. The MG27 crossover was set to full range. The microphone was about 20cm away from the speaker. The measurement was done in my living room. It fits quite well with the curves in the articles. Its not a reference measurement, but still reflects the bass linearity. And its 30 years in-between :D
The resonance at 2kHz is probably my telephone ringing.
I will upload more measurements soon.
I will upload more measurements soon.