I'd look at the sub's level to ensure it is balanced with the other speakers. All that is happening is that the frequencies at and below 80Hz are being directed away from the speakers designated SMALL and redirected to the sub for it to handle. This gives the AVR more headroom relative to the upper frequencies it is still amplifying. If you had the sub set to the LFE + MAIN setting then I'd have to suggest that what you were hearing wasn't desirable anyway and was more than likely more bass boom than bass impact? You should try locate the sub in a location where it portrays the bass at its best before you even start to calibrate the setup. Maybe locating the sub elsewhere would be an option?Awesome thanks, i’ll set the filter back at 120hz
I’ve tried the front as small at 80Hz and the system sounds very very light and lacking detail/grunt, any reason that would be happening?
These speakers do seem quite hard to drive from previous lower spec Amps.
You may find this article of interest:
Crawling for Bass - Subwoofer Placement Tips
AV Receiver Bass Management Basics – Settings Made Simple
Also note that redirecting the lower frequencies away from the speakers and redirecting those frequencies to the sub would in effect make your speakers easier to drive. The lower frequency drive units (woofers) within a speakers are the ones that require more effort on the part of the amplifier to drive.