Re: How to hook up additional sub
The Y adaptor will allow both subs to run off the LFE channel, it can be complicated t adjust two subs on the same line (I've done it with four this way) the best advice I have is to first do each sub separately, find where they sound best in the room, calibrate them, then move onto the next sub. Turn one off at a time, working on the other then turn the other off and work on the last one. Trying to tune them in both at the same time is highly NOT recommended as you'll go insane before you get it right!
Ken Taraszka, MD