ok so I have a performance teknique icbm 5912 and a JL 12w3v3-4
put the jl in a 1.0 ported and the PT in the 1.75 ported from the JL box (PT sounds like pure crap in the 1.0 box)
the PT is inverted and the JL is not.
it sounds like CRAP for some reason.
I noticed one sub will flex if I push the other down (why does this happen even though the boxes are not connected?)
Would it make any difference if I made a box for both of them that shared the same air space?
I plan to get a second 12w3 so this box would be for the future sub and not for the PT sub.
Say what you will, the PT sub cost me about $60 and hits harder than the JL and has taken a lot of abuse.