i have only tested twice, i dont have my own meter. but the only time i've tested with two amps in one of them was only at 25%( it was partially blown when i bought it, smoking and shit but still worked.) those two burps were done at 43 hz only, never tryed another and i produced a 155.2 and a 156.3 outta it before it completely shut down.
my box is tuned for 27hz because i listen to my system and drive it every day. but i will be doing some box manipulation over the winter and rounding inside corners as well as shortening the port and taking out 25 inches, my port is 39 inches long right now. and i am rebuilding the subs with some 8 layer flatwound aluminum coils with 3 stiff spiders instead of the 2 i have now.
i am going to run 10 135ah AGM C&D batteries to the one SD16kamp and another set of 10 to the second SD16Kamp
with all these changes 160 is just a shortchange number!
by the way just payed for the 1st SD16k just today...//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif