1, the audio subwoofer is generally divided into two kinds of active and passive, say passive, passive is generally by the computer sound card push, put on the amplifier, or buy a desktop amplifier with subwoofer output.
2, in this case, the subwoofer is connected to the bass output port of the amplifier, not the output from the computer sound card. 2.0 output also to the amplifier, the amplifier is connected to the SW port.
3, active speakers can consider using the computer sound card directly, usually nowadays integrated sound cards also support 5.1, if there is a source input and output function, the sound card does not need a separate bass port, use 3.5 RCA to access the subwoofer input.
4. At the output of the subwoofer, red and black RCA or RCA speaker cables are connected to the left and right front speakers of the 2.0.
5.If the subwoofer does not support outputs, two wires are required. In the sound card driver, select 5.1 or 2.1 mode. The main speakers are normally connected to the green jack and are connected to the main speakers via a two-part 3.5 rca lead.
6, look at the motherboard manual or sound card instructions, another wire connects the subwoofer to the appropriate interface, usually 3.5 RCA, subwoofer RCA wire, usually 3.5 RCA is two red and white wires, and the subwoofer may only have one RCA access as long as it is connected to the red wire.