Gerald has the testing equipment and when he comes down for a visit we will test them and post the results . but till then the best I can do is say I have samples of different Hz ranges and @ 20Hz I have the plate amps turned up to 30 watts each on each sub cabinet and on my mixer im pushing -16 db with the gain @ mid point and you feel it in your chest and they are quite loud enough for me that I only push about 30 watts through them . Believe me they no slouch 