jacks for attenuator

[DSones]

My vox ac15c1 amp has the amp out wired directly to the speaker. I want to be able to use an attenuator. I want an amp out jack and a speaker in jack for when I use an attenuator. I want to wire the jacks so when an attenuator isn't used the amp out automatically connects to the speaker. I see instructions on how to add an amp out jack and speaker in jack to connect an attenuator but if you don't use the attenuator you have to use a jump cable to connect the two jacks. I would like to not use a jump cable. Any ideas or wiring diagrams out there? Thanks

[maxkracht]

You just need a switching jack. Wire the switch side to the tip of the speaker output already in your amp, wire the tip to your speaker +. When you plug something into the new jack it disconnects the speaker from the internal jack. If this is confusing, look up switching jack, then draw your own wiring diagram until it makes sense. Shouldn't take you long to figure out.

[sluckey]

If I'm understanding correctly, this will do what you want...

[mhuss]

I like sluckey's diagram, but I'd add a 220ohm 5w resistor across the output jack as insurance against contact corrosion or bad cables.

[maxkracht]

I might be missing something, but I would just use the one switch at the speaker instead of one for each jack. One less point of failure since the switch contacts sometimes get dirty or bent out of shape.

[mhuss]

I agree, the switch on the speaker jack is not needed and adds complexity.