AV-Quartz 3-way active electronic crossover to upgrade your sound system into active system - great value for beginner. Lot of features. Can divide one or two RCA input into 3 RCA output for sub-woofer, mid and tweeter. Other features: Phase change for sub, mono/stereo switch for sub, selectable 2-way/3-way operation. 12d/b slope for mid and tweeter. Going off cheap at rm150 cash and carry. Just used around ~3 weeks to test. Selling coz need to test other crossover as well :P First come first serve. TQ.