2. tech-talk
  3. 126854-1529

Is this a phase issue? How to fix?

I noticed when I measure individual frequencies in the range of 60-80hz, the measured combined output of both speakers is about 4-5db less than the individual levels. For example, at 70hz the left and right speakers measure 77db but the combined output is 73db. So does this mean I have a slight phase issue in this range? If so, is there a way I can fix it?
128x128tboooe

Showing 1 response by erik_squires

erik_squires
15,877 posts
 
If it is CONSISTENTLY poor through the bass it’s a polarity issue. If on the other hand, you see rippling of the frequency response at your seated position this kind of thing can happen because of different path lengths from the speakers to the microphone from different reflections.  You should notice not only dips but peaks as well.

+- 5 dB is definitely in the range of the latter issue. Polarity issues are usually wide and deep.


More to discover