I made a disc of test tones downloaded from the net and did the graph pictured below. The amp volume was set to 00,the crossover 80hz. The volume on the sub was about 40%, the crossover at full range and the phase set to 0deg. During the test i had to change the spl meter range up and down between 80dbl and 110dbl to keep the needle within the scale. How does the graph look and have a carried out the test correctly,where the response goes off the graph the highest reading was 108dbl. i would be gratefull for any help P.S sorry about the quality of the graph it is the largest it would allow me to post.