A tri-way crossover is a small external crossover circuit that takes the output of two channels and separate it into three channels. You can power two full-range speakers and a sub with these three channels. To wire it perfectly you’ll need these things before we start, a tri-way crossover, a 4 channel amp, a wire strippers, crimp cap connectors, and a crimp.
Check if your 4 channel amp is tri-way capable. To know this you must consult the amp’s manual or check with the manufacturer, they usually have supports that can answer costumers questions, or check their website.
Check the owner’s manual to see which two outputs are used to combine or bridge the output of two channels into one. You’re gonna use the bridged outputs of channels 3 and 4 to connect to the tri-way crossover.
Now remove ½” of insulation of the tri-way crossover’s lead using a set of wire strippers.
Now with a screw or a hex wrench loosen the correct amp’s speaker output terminals and slide in the wires shown by the tri-way crossover’s manual. Tighten them back on. Remember, the tri-way manufacturer wiring schemes are different from model to model and brand to brand, so make sure you get the correct one for yours. See the “resources” part to see the correct wiring scheme for one model, and make sure you are using your own tri-way crossover’s instructions for your system.
Connect the tri-way output wires to the correct speakers by matching up the indicated wire colors to your speaker wires, twist and crimp them together with a crimp camp using a crimp tool.
Please note that most tri-way crossover are only designed to work with 4 ohm speakers. Check your tri-way manual for specification.
