ButtKicker BK-QCP Quick-Connect Quick-Select Package Easy-to-use kit simplifies installation of multiple ButtKicker LFEs Allows up to 4 ButtKicker LFEs to be connected to one ButtKicker power amplifier Lets you select whether or not an individual ButtKicker will receive any power Comes with an RCA Y-type connector and speaker-level interface adapter so you can use a subwoofer in conjunction with your ButtKicker LFE Includes all necessary wires and connectors to connectors for up to 4 LFEs