Looking for VERY simple A/B Speaker switch schematic

[pitguy3]

First- Sorry for all the questions...

I have 1 input and 2 pairs of speakers that I want to switch ... This is for an outdoor application. Do I need to worrk about impedance matching? Can I just have a simple A/B Switch? When I wire it, can I straight wire all the negs and just switch the positives?

Thanks in advance!!

[PeteMcK]

'Do I need to worrk about impedance matching?' - only if you want both sets of speakers working at once
' Can I just have a simple A/B Switch?' - yes
' When I wire it, can I straight wire all the negs and just switch the positives?' - yes

use heavy duty switches and wire, be very careful that nothing will short out, or you'll blow the amp...

[DigitalJunkie]

When I wire it, can I straight wire all the negs and just switch the positives?

Yes,You can...Assuming that the amplifier uses a 'common ground' scheme.
If it's class-D,or bridged,etc. you DO NOT want to connect all the negatives together,as they might all be at some/different potential.

Generally it's okay with the "usual" amplifier topology.

[pitguy3]

Thanks DJ and Pete! The stereo that I am wanting to do this to is a Phillips model FW316C... It's a CHEAP stereo that I bought at a Thrift store ($17 believe it or not) to go outside... It states that it has a 3 ohm output impedance and the other set of speakers I have states that it ranges from 4-6 ohms... Not really wanting to run both sets at once, but it would be somewhat nice if I could...