About the mid level end set up, hanga si doc in my install, nasa front view yung imaging kaya okey lahat, by the way, its a 4year old set up so his head unit is a keenwood that only plays cd's, no more DAC so its sound accurate, nasira yung seps nya, fearless noon, around 40k, kaya nagpalit, nahabol ko pa daw yung sound in a difference 40k in 12 k, ewan ko lang, gumana yung installers way siguro pero siguro, sabi nya lang yun, di ako believe sa sarili ko e, ginagawa ko lang lahat yung tama, sub nya is audiobahn, amp is rf power na 4 channel na old model, mode ab, ok naman, power supply is not a problem there, gumamit ako ng osciloscope, accurate pa rin signal nya for those years, meron sya e, tsamba siguro,