My brother wants to switch two amplifiers between two sets of speakers, so I designed a circuit for him to do just that. You can find it at the github site
GitHub - profdc9/SuperSpeakerSwitcher: A heavy duty switch between two audio amplifiers and two sets of speakers.
Two channels are switched. Two 16 A relays are used to minimize contact resistance and allow for 32 A total continuous speaker current per channel. Both sides of the PCB are used for the connections to minimize trace resistance. The speakers connect using quick connect terminals to the PCB. The control is using a 12 volt remote enable signal that needs to source at least 2 mA. The PCB is powered by a 12 V wall wart that needs 1 A output.
GitHub - profdc9/SuperSpeakerSwitcher: A heavy duty switch between two audio amplifiers and two sets of speakers.
Two channels are switched. Two 16 A relays are used to minimize contact resistance and allow for 32 A total continuous speaker current per channel. Both sides of the PCB are used for the connections to minimize trace resistance. The speakers connect using quick connect terminals to the PCB. The control is using a 12 volt remote enable signal that needs to source at least 2 mA. The PCB is powered by a 12 V wall wart that needs 1 A output.
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That's pretty clever - thanks for sharing! I purchased a good-ole-fashioned knife switch to swap which amp drives the speakers.
1pc 32A 4 Pole Double Throw Knife Safety Disconnect Switch 220V 380V | eBay
1pc 32A 4 Pole Double Throw Knife Safety Disconnect Switch 220V 380V | eBay
Yeah, a good old heavy duty 4PDT switch, or even a pair of them (to eliminate ground loops) is simpler, and even saves the planet from excess solder use.