I previously had a JBL HTIB system and a Yammy receiver.
as per the manual, I was supposed to set the satellites to "small" and connect the subwoofer to the LFE output.
but as I was looking at the specs today ... the JBL satellites were -6db to 100hz. so in real life flat maybe to 120hz. But see, the problem is, during that time the receivers had a fixed crossover point of 90hz.
so I was actually missing all the information between 90hz to 100hz (or 120hz)!! [yes, I know its not a brickwall, but still!]
sure at the time I felt something was missing, but I didn't expect it to be missing information right smack at the middle!