Thx for the suggestion @ChickenSandwich but unfortunately hindsight is 2020. I went with the bazooka tube because back in the 90's early 00's when I was working in car audio they were an easy answer for people who wanted want just a little extra. I always wanted a lot extra back then as I went from 3 10's (JL 10w6's), to 4 12's (JL 12v4's), back to 2 12 (Rockford Fosgate P3's). Since then I've always bought BMW's with the upgraded HK or Enhanced Premium and at my old age it's perfect.
I was able to play with the Iine out converter gain today and it may be my problem. The level is either very low, essentially off, or full blast. I may try to replace it or bypass the low level outputs (I'd only be using the LOC for the audio sensing remote out) if I can't get it dialed in (Bazooka actually recommends high level inputs).
I'm still deciding if I want to be honest and sent the second tube that was sent by mistake back.
Got it in though.