Ported Subwoofer Build Projects
Just the beigninning of a box modification from JBL 2240H to a SI 18-DT4.
Box size is 7.03 cuft.
I measured using LinearX LM using power and mass as follows.
Power tests were 0.1 ,1,10 and 50 watt free air
Power used for delta mass measurement 0.1,1,10 watt
Delta mass used...