The HK system has a dedicated subwoofer. I don't think simply swapping speakers without adding a subwoofer will get you what you're looking for.
I think its just that stock E36 is dead below 500 HZ. So i just want a good system that plays a good, not excessive bass. i dont want oomph.what are you trying to do? more bass ? more oomph at the front seats where you reside?
do you just want to rip out all old speakers and replace with similar but newer made (and review say better sounding) - go with bws
add a 8" - 10" sub... hey make your own box and go all the way up to 12" !!!
or rip out everything and install speakers & amp combo and basically you'll be heaven.
i've had all 3 systems.. the custom speakers (rainbow 6.5" & a bsw 12" sub) - amazing.
with the hk system, definitely need a little more bass by simply adding a sub
normal standard system... if its original speakers you're probably have a crappy surround and its deteririoting
As i mentioned im not into a booming bass sound that shakes the car and is heard on the street.> what are you trying to do? more bass ? more oomph at the front seats where you reside?
btw turns out i have a speaker in rear door. so i have 8 speakers fwiw>> id go with bws