Could someone please describe the process to sweep the entire frequency range with the SPL meter to create a graph? I am looking to do this soon and simply want to understand the process better. I would rather go this route than using the MCAAC on my Pioneer Elite. Would like to see if this gives me a more natural sound - after tweaking placement and paneling I have.
The test DVD you choose should generate the frequencies you wish to test. Set up the SPL meter (I would use a tripod to reduce any chance of interferance) in the prime listening position. Start playing frequencies and record the changes in dB level at every frequency tested. This should give you the data you need to see where the highs and lows are in your frequency range. The greatest advantage is at the lower frequencies (100 Hz and below) because they affect the overall sound of the room most drastically. If you have a lot of peaks in the lower range, try moving the speakers away from the walls. Same for the subwoofer. Start the subwoofer in the center of the room, directly in front of the main listening position. If you have a good subwoofer, base reinforcement should not be a concern or necessity.
Re Test.
This is easy, it just takes a LOT of testing and experimenting. Once the main speakers are semi situated, start on the subwoofer location. Same philosophy but remember the subwoofer has the most dramatic affect on the frequency response of the rest of the range.
Once you have data, try to eliminate the valleys and humps in the overall frequency response. If you have to pick a poison, it is better to eliminate the humps in frequency response (below 100Hz) because they will overpower the midrange frequencies.
PM me if you need more help as you go along. This is a tedious process but far safer to implement without destroying the predictability of room response (i.e. equalization is bad).
