THEMERQ

I installed a new battery and it worked correctly, thanks. The old battery was at 7 volts..

I was setting the gain with my DD-1 and I accidentally put the red probe on the negative speaker terminal and now it shows distortion no matter what, even before it detects the 40hz signal. Can it be repaired?

i set the gain with the -10db tone and its not as loud, i meant did i mess up the dd-1 not my system.

but why did it start distorting like that? did the mess it up somehow.

the volume a the source is at max undistorted volume. i dont know i just decided to try it.

i was setting the gain on an audiopipe ap30001d with the 40hz 0 db tone and i set everything up the way it was supposed to be. i had the dd-1 negative connected to the amps ground and i noticed while turning up the gain that it would distort with the gain very low, but not at minimum. so i set the gain down to the point with no distortion. then while the dd-1 was still on i disconnected the dd-1 negative and connected it to the negative output terminal on the amp and it sparked a little bit when it touched the negative on the amp output terminal and the distortion light instantly lit up. i tried seting the gain all the way down to minimum and it still shows distortion. what happened? before i did that even with the gain at minimum there was no distortion.

thank you very much for all your help.

i still dont understand what this means. i saw a correlation with the numbers before i posted the box but i could not get it. basically what your saying is even though i chose the port to be 32" long. it only has to be 25.75" physically? and just to make sure, if the port will bend then the port must stay the same width all the way through right? i also tried making the port 6" wide but it was coming out to some crazy long length.

on paper i did inner to figure out my volume. i didnt mean to post them the first time, i intened to post the outer dimensions. is the new one correct?

ok i came up with another one, i think this one is perfect. sanitarium thanks for your design but i have to shorthen the heigth as little bit. new external dimensions are 42" wide X 24.5" deep x 17.5" high. that gives me 8.63 cubes gross. minus .28 cubes of sub displacement, minus .07 cubes of bracing. 8.28 cubes NET before port displacement. port inner dimensions are 16" high x 5.5" wide x 32" long with 3 common walls. that will tune the box to 30.02 Hz and 88 square inches of port area. for this box the port must bend at 18.25"(this includes the baffle) and run another 13.75" to complete the 32" of length corect?. so my two port pieces will be 17.5"x 16", and 13.75"x 16"? all this yields 6.19 NET cubes @ 30.02 Hz.

i do my dimensions differently than the calculator, those are my max inner dimension. max outer dimensions are 42"wide x 24.5" depth X 17.5" high tuned @30 Hz. port with 3 common walls

this is all using the torres box calculator. my outside dimensions are LxWxH 40.5 x 24.5 x 19.5 it comes out to 9.7 gross cubes. bracing displacement is .11 cubes, driver displacement is .28 cubes. that leaves me with 9.31 net cubes before port displacement. my problem is i cant seem to tune the box to 30 Hz without volume dropping drastically AND maintaining 12-16 square inches of port area AND a 1:6 port ratio. i tried the port at 18" high X 6" wide X 30" length and that drops me down to 6.82 NET cubes, 108 square inches of port area, and 1:3 port ratio. i tried 18" high X 3" wide X 11" length and that drops me 8.68 NET cubes, 54 square inches of port area, and a 1:6 port ratio. this is for 2 15s and im trying to maintain at least 4 cubes per sub. what am i doing wrong?