My brother rented a Bose 'Lifestyle' music and home theater system from a local Aarons rental purchase, it's pro-logic based, comes with five tiny cubes and a passive sub. He wanted me to hook up and calibrate his system for him, but when I was inspecting the sub, I noticed something strange that I didn't know how to set. Unlike your average sub that has two control settings on it, 'Low pass frequency cut off' and 'Level Control', this sub has a 'Bass' and 'Treble' control on it and I have no clue on how to calibrate this type of sub with my sound meter and 'Avia' dvd. So I told him to wait a couple of days and told him i'd start a topic on it here, and then set up and calibrate when I know more. So how do I calibrate a sub of this type? Thanks. ------------------ So madly in love with Estella Warren!