How to Hook Up Two Amps Together
Speaker wires or cables are used to make an electrical connection between speakers and amplifiers. They usually consist of two identical cables, marked to identify the audio signal separation.
An amplifier switch is a plain box that allows you to switch in between amplifiers. Amps connect to the input connectors while the speakers connect to the output.
If you want to compare amplifier sounds or prefer to use an amp at a specific time, an amplifier switch is ideal. It also works best if you want to connect two or three amps to a speaker.
- Connect a speaker wire from one of the amps to the first input connector at the back of the switch.
- Run the wire from the second amp to the second input connector.
- Attach the speaker wire from the first output connector to your speakers.
- If you want to switch to the second amp, all you have to do is change the speaker wire from the first output connector to the second output connector.
AV receivers have various channels for front and rear speakers, surround speakers (two for the rear), center channel, and subwoofer. That means an AV receiver will run your speakers and subwoofer adequately and concurrently.
- Check the connectors at the back of the AV receiver’s panel.
- Attach an RCA wire from the front speakers’ outputs on the receiver to the amplifier’s input jacks.
- Run the same cable for all other speakers, including the subwoofer. Ensure all are appropriately connected.
- Connect all the speaker cables from the amplifiers into their corresponding ports on the speakers.
Hooking up two amps with a crossover is another effective method if you want to use all the speakers simultaneously.
A crossover is a machine that distinguishes high frequencies from low frequencies . It directs the high frequencies to the first amp, which usually powers the tweeters, while the low frequencies go to the second amp that powers the sub.
- Attach a connection wire into the crossover’s high-frequency output port.
- Plug the other end of the same wire into the amplifier’s input port designed to drive the high-frequency speaker.
- Plug another connection wire to the crossover’s low-frequency output port.
- Plug the other end into the amplifier’s input that will power the low-frequency woofer.
- Run a speaker wire into the speaker’s high-frequency output jack. Do the same to the input jack.
- Run another speaker cable into the speaker’s low-frequency output jack and the other end into the input port.
- Modify the crossover frequencies and power up your system.
RCA Cable Jack
- Never run two amplifiers to the same speaker simultaneously, as they will damage the components, mainly if it’s a home theater system.
- Use durable and reliable crossovers that match your speaker’s quality and home theater system.
- If possible, the speakers should have different inputs for high frequencies and low frequencies.
- Ensure that all your equipment is plugged in.
- Do not power on all the equipment at the same time. Start by turning the receiver on and then the amplifier.
- Connect all the cables to the right connectors (inputs and outputs).
- Check all the fuses and breakers to avoid circuit break.