2 Power Amplifiers 1 set of Speakers - Amp switch? - Page 2

This is BS, who told you that?

The two attachments in post#28. The first one works, the second one does not.

Perhaps the reason is different but the first one did not work when connecting two amps and one set of speakers to switch between. The second one did.

The mechanical drawings of the switches don't tell you anything about them electrically.
Chances are you connected it wrong, which is why it didn't work.
There is no impedance matching here.

I made a DIY amplifier switch. It is a very simple project, no power supply required, only a few passive components. Here you can see more pictures of the project: DIY amplifier switch

Yeah, there is no impedance matching to the switch.

However, if anyone is contemplating using a tube amp with a selector switch that could potentially put the amp in an unloaded condition you could damage the amp, possibly quite severely (output transformer ruined, etc.). I've seen some recommendations to put resistors, say 150 ohms, across the terminals used for the tube amp side just in case you turn on the amp with no load or change the selector switch and remove the load with the amp on. For SS amps this generally isn't a concern.

Guys Niles A/B Amp Speaker Switch.They go for around $90 bucks.I have one and it works great.I have it hooked up to two AVR's and one set of Polk Monitor 70,s.Again it is well build.You hook up all the speakers wire's from the two AVR's,Amp's,and speaker wire that will run too the speakers also hook up too the A/B Amp speaker switch and your good.

http://www.amazon.com/Niles-Audio-DP...scending.Heres the link to it.http://www.amazon.com/Niles-Audio-DP...pr_product_top

A 4PDT switch and some terminals run less than $10. Granted not as pretty, but still foolproof as long as you get the connections right.

Where do you buy the parts for $10?

try digikey for a start

OK, can you post a model number of a fairly large one since it's hard to work with smaller ones?

That's the one I tried originally and it didn't work so I had to use a smaller one, if anyone else ever tries it, please posts if it worked.

Then the switch must be broken (and you should ask them to send a replacement) or it was connected improperly. Those are the only two plausible explanations why it didn't work.