its been a while since i've been on the board, but i guess i'm back now. i need to get some help from yall.
I still have my SX15 and i got a replacement bp1200.1, i have it doing 145db...but i recently got a craftsman clamp meter and found out that my impedence at my burping freq is jumping to ~6.5-7ohm! this box rise is killing me! i'm guessing the sub is only getting ~450wrms at my burping freq.
my current box is 3.8 cuft tuned to 44hz w/ 50sq inches of port...
What can i do to get my box rise down?
i was thinking about reconeing the SX15 to a dvc 0.7ohm config and running at .35ohm nominal. also i what thinking about rebuilding to a 5 cu ft box w/ 75-100sq inches of port. What do yall think?
well ill say this assuming that changing amps doesnt change your impedance results that would be one way around it like if you had a 8 ohm bridged amp that put out the needed power then it would dip to give you even more power than rated 8 ohm dridged but that would be costly
the only other way i no is by adding insulation teporarily but that will changed the port tune as well as the box size seen but what im aiming for here is does the impedance drop as i have read with larger box sizes ....the best way i no to calculate this effect would be with my adjustable box idea with the adjustable ports and do your impedance readings and your on your way to more power from your amp and more spl from your speaker
cutting your impedance down from 6.5 to 7 to 3.5 to 3.25 would mean a doubling in power.. basically a theoretical 3 db gain and 1.75 to 1.625 would be another theoretical 1.5 db on top of that ....a possible 149.5 db