Max output level and power compression
Maximum long term output level was measured using a 30 second linear sine sweep from 100 Hz to 10 Hz. First sweep was level matched at 90 dB at 50 Hz. Drive level was raised by 5 dB after each sweep. Sweeps were taken up to the point where the output level exhibited clear compression. This is a very demanding test and the results should not be compared to other tests with faster sweeps etc. Power compression graph is showing the relative compression to the 90 dB sweep.
Round 3 ->
Sweeps were taken up to the point where the output level stopped rising (5 dB or more of compression). I also tried 2 dB as the last step, but usually it didn’t help.
Round 1 and Round 2
Maximum long term output level was evaluated with a 45 second linear sine wave sweep from 100 Hz to 10 Hz. Sweeps were conducted at progressively louder (3 dB increments) levels. If the sound of the subwoofer became too ”stressed”, the sweep was stopped. The levels shown are the very maximum levels, meaning the next sweep was totally compressed.
Max output should be as high as possible over as wide frequency range as possible. Power compression should be as low as possible.
