Switch Necessary to Protect Amp Used as Cabinet?

[The New Steve H]

I mentioned this in a thread, but no one responded, so I thought I'd give it a thread of its own.

I have a 4-watt amp I want to use as a cabinet. If I add a jack so I can connect another amp to the speaker, do I have to put in a switch to disconnect the 4-watt amp from the speaker, or will the circuit be protected by its own impedance?

[NickC]

Is the speaker wired directly to the OT of the 4-watt amp, with no 1/4" jack or plug?

If so, I suggest installing a 1/4" speaker jack (switchcraft or cliff) somewhere on the box and hook the speaker up to it. Then install a 1/4" plug on the leads from the OT. Plug them together when you want to use the combo. When you want to use a different amp, just shut off the 4-watter and patch as needed.

[The New Steve H]

The problem with this amp (Vox AC4TV) is that it's completely closed, so you can't use a wire that hangs off the OT. I'm thinking that if I have to do anything at all, it should be a switch that opens one internal speaker wire.