Boston Acoustics $. $. BassTrac(R) circuitry eliminates distortion Slot-firing design for in-cabinet installations Front-mounted volume control Die-cast finger pulls allow easy installation in tight spaces Enclosure Type: Vented – Front firing Speaker Terminals:5-Way Binding Post BT1100 Woofer Self-adhesive Neoprene Feet 4 x Speaker Spikes with Floor Pads Power Cord Woofer 50 Hz to 150 Hz