Hi John, how are you doing? I have DIYed a JBL L300 with cabinet size same as stock, cabinet made of birch ply. I am using 2216 ND, 2420 and 2405 (Alnico) drivers. I am facing two challenges: 1) HF is too hot/ sharp 2) Bass is missing!! I am using Nelson Pass XO for MF, HF and S4700 type LF. Would you have any pointers for me to check? Thank you for reading and for your help. regards, Sam