i dont know, im just guessing that a solo x and 1500 watts shoudl be higher than that score, and i was looking in the instruction manual online and it shows the two mics, and the one i used definitely didnt look like the spl one.....but my score was a 135.7, not a 136 so im still wondering if he had the 136 mic, and it only really goes to 135.7, or the mic was damaged anyway, or my setup is just really weak.....