OK, So considering buying a meter. I understand that it measures the "pressure" of the sound, but does 16khz pressure have the same "volume" as say 31hz? Hope this makes sense in my lame-mans terms :) Basically want to know if pressure=volume at all frequencies. I don't want a booming system without equal parts of mids and highs.

I am asking because I want to tune my subs in my car to stop at the frequency that my main drivers pick up. I know what they are rated at, but I can hear the volume drop on certain frequencies using the Alan Parson's test CD. I have adjusted the EQ to an extent (12 band) to hear what I think is close.. but would like to see how much more I can get out of it by using the correct tools.

OK, So considering buying a meter. I understand that it measures the "pressure" of the sound, but does 16khz pressure have the same "volume" as say 31hz? Hope this makes sense in my lame-mans terms :) Basically want to know if pressure=volume at all frequencies. I don't want a booming system without equal parts of mids and highs.In theory and with a perfectly flat SPLM, yes. However, what you perceive as volume is a function of your hearing sensitivity which, in normal humans is less sensitive at the upper and lower ends of the spectrum. Nonetheless, the SPLM will give appropriate measurements.

I am asking because I want to tune my subs in my car to stop at the frequency that my main drivers pick up. I know what they are rated at, but I can hear the volume drop on certain frequencies using the Alan Parson's test CD. I have adjusted the EQ to an extent (12 band) to hear what I think is close.. but would like to see how much more I can get out of it by using the correct tools.OK