I want to wire in additional speakers to my bluetooth subwoofer when I open it up there are two connectors that lead into the speaker one is for the power the other is for the speakers wired which one do I connect the external wiring to my choices are a set of red white and black wires or the red and black only wires
If each channel (+ and - speaker connection) is using a 6ohm speaker as normal, there's 2 ways to add another.
In series or parallel. If you run in series, (+, - to +, -) you get 6ohm +6ohm =12ohm = half the volume.
In parallel (+ to +, - to -) you get 6ohm/2 = 3ohm = twice as loud = twice the power draw on the amp, IF the amp can handle a 3ohm load, (doubtfully) and not burn out rather quick.