@ qureshi , speakers are running directly from head unit , means 22Wrms from HU to a 80wrms speaker ,
2nd , No problem with reverb , or inverted , the more internal area of ported enclosure u get , the more out u get
putting 2nd sub in right position , will eat internal volume
3rd : about ports ,
beam pass L ports tunning are rubbish , so i decided to make my own tuned box , i have command on round port tune box (easy to tune , then tuning can be change
whether you want low tunning , or high tunning )
Smartboy , Thanks (us day kay baad , thora orr SPL increase kardiya more high tuned after then )