Matt T

Hi all. I've just installed some Sony XS-XB1641 6 1/2" 4 way 350w speakers to the rear doors of my 2021 mitsubishi triton. I'm not getting any base from them at all, only mid and high range, have also fitted same model component speakers to front and they work fine, all running off of factory head unit. Anyone have any ideas on why they aren't working properly?