ldeveraux wrote:I have 6 composite audio devices into a manual switch. I'm looking to automate with an automatic switch that actuates on signal.
By "composite" I think you mean "RCA/phono," so I'm going to answer you based on that assumption. First off, what you're looking for is a function that is performed by 2 common devices in a signal chain. The most common approach is to use a preamplifier that has the number of inputs that you require. The second approach is to use a mixer. Preamps tend to have remote controls, giving you the actuation; mixers sometimes have remotes, but only the more expensive and complicated ones, and you would end up with a large device with lot's of controls. There are small, passive mixers which do not have a remote (I use one of those for one of my setups).
Another more common way that source switching is accomplished (especially in commercial installation) is with speaker source switches. This is at all times preferable because you lose less signal when it is already at a higher level. If you put switches and cables between a source and the amplifier, you will lose detail in the signal because it so low. This is especially an issue in commercial installation because cable runs tend to be much longer.
If you want the function you're looking for, you are going to have to think outside the box. The best I can think of is an AV switch with remote, which has both video and audio, and just use the audio part. Unfortunately, AV is almost dead in the consumer marketplace (for HDMI), so you may not find it new anymore. You can check ebay, etc and it should be cheap.
However, if it was me, I would probably take care of whatever function of switching you are trying to accomplish in a better way that maintains signal integrity.