I run a nicely modded Trabscendent Sound GG preamp that I built. It currently only have one set of outputs, and I'd like to add another set, along with a selector switch that will allow me to choose between the 2 amps (to allow me to use the same front end with different amps driving different speakers) or to run the 2 amps at the same time (to biamp one set of speakers). I haven't yet decided on whehter the 2nd amp with be tube or SS, but my main amp is a Finale Audio EL84 SE design.
I need help knowing what type of switch I would need (I assume it'll be a 3 position toggle with the center position sending the signal to both amps), and what the wiring schematic would be. A picture of the internals of the GG is attached. There is a lot of room to work inside the chassis, as well as a lot of room on the back panel to add a toggle and another set of RCA outs. I am not at all concerned with drilling holes in the back panel.
I just want to make sure I do this right, and I'm not sure what the potential pitfalls will be. I would appreciate any help!
I need help knowing what type of switch I would need (I assume it'll be a 3 position toggle with the center position sending the signal to both amps), and what the wiring schematic would be. A picture of the internals of the GG is attached. There is a lot of room to work inside the chassis, as well as a lot of room on the back panel to add a toggle and another set of RCA outs. I am not at all concerned with drilling holes in the back panel.
I just want to make sure I do this right, and I'm not sure what the potential pitfalls will be. I would appreciate any help!
If you want to be able to drive one or the other or both you could use two DPST push switches, one to select each output. This is pretty standard way that power amps with multiple speaker outputs switch them. You could use DPDT switches and the spare end can be wired to ground so that when an output is not selected it has low impedance (reducing noise in the relevant amplifier).
I can't see how a 3-position toggle could work as you suggest as centre is no connection.
I can't see how a 3-position toggle could work as you suggest as centre is no connection.
Thanks, Mark. I wasn't sure if the 3 position switch idea was valid or not. But the other suggestion makes sense.