JL e110 sub

actually i read that thread. 
But it's still not very clear.

I put the subwoofer between the preamp and amp, utilizing the JL's internal crossover.

When I set the sub crossover at 60 hz, and when I play a test track of 50 hz, am I supposed to hear output from the speakers also?  or should they be dead quiet, since all the signal is going to the sub?

thanks again

i am using a locally built tube preamp and amp

there is no sub output from the preamp so i need to place the sub in between and use the internal crossover

speakers are totem hawks for now but getting new ones soon

i don't quite get how crossover works.  I thought if you set the freq to say 60 hz, then there is no signal going to the main speakers.  If there is, then essentially i am running the speakers full range, and supplementing freq below 60hz with the sub.  How do people connect to subs at line level without crossover.....so confusing

Got it
thanks for the explanation