I posted in another thread but I have more concise information and I believe this is relevant to MacOS. I have a bluetooth speaker that is too loud; but, only on my Macbook. Is there a way to calibrate the acceptable levels of output? 25% volume (4/16 bars) ends up being what would be 100% on my internal speakers. I have looked into MIDI setup but that did not work. Of course, simply the Sound Preferences Pane yields no results. Notably, it seems that MacOS thinks the speaker is outputting at a dB that is not accurate to reality. Comparing my internal speaker output at 0 = -63.5dB, the bluetooth speaker at 0 = -96dB. internal 1 = -47.5dB, bluetooth 1 = -95dB.