Yes the Yamaha did have Sub-out (but was never used) like i said i connected the amp and speakers and that was it
I never found the need for a subwoofer these
al-III plus speakers really put-out
but i am working with all new Electronics like you said (new territory) so do i NEED a SUB and if i do WHY because i have plenty of Bass But maybe i'am missing the point

BIGTIME thank Gonk (this is for your help $$$$$)