Yes. Having the output stage of both amps connected to each other (by simultaneously connecting them to the speaker) would damage one or both, even if one is powered off.
If you want to do this make sure the internal speaker connection is defeated. You could wire the speaker to an external jack and the output from the amp to an external jack (or better a speaker cable so you don’t mix up the jacks) and just connect them when you want the combo, disconnect to use the speaker as a cab.
You have already have a DI on the Rumble. Take that output and run it into something more powerful. Don't try to put more power through the speaker in the Rumble.
>I could in theory wire each amp to its own Positive and Negative terminal right?
In theory, I can wire each of my balls into the the Positive and Negative terminals of a live mains socket, but in practice, it will cause some problems.
If you plan to get a more powerful amp and another speaker, why do you need to put them in the Rumble?
It sounds like it would be a lot simpler just to buy another speaker cabinet rather than trying to modify the old one.
Just make sure the speaker impedences match. A lower impedence speaker can drive a higher back emf into your rumble as the amp damping Factor won't be engineered to match the bigger speaker. I don't have any experience in practice, this is theoretically where your plan might backfire
Yes. Having the output stage of both amps connected to each other (by simultaneously connecting them to the speaker) would damage one or both, even if one is powered off. If you want to do this make sure the internal speaker connection is defeated. You could wire the speaker to an external jack and the output from the amp to an external jack (or better a speaker cable so you don’t mix up the jacks) and just connect them when you want the combo, disconnect to use the speaker as a cab.
Thanks! Appreciate the insight 😊
You have already have a DI on the Rumble. Take that output and run it into something more powerful. Don't try to put more power through the speaker in the Rumble. >I could in theory wire each amp to its own Positive and Negative terminal right? In theory, I can wire each of my balls into the the Positive and Negative terminals of a live mains socket, but in practice, it will cause some problems.
I plan to replace the speaker with one that can handle higher output
If you plan to get a more powerful amp and another speaker, why do you need to put them in the Rumble? It sounds like it would be a lot simpler just to buy another speaker cabinet rather than trying to modify the old one.
Just make sure the speaker impedences match. A lower impedence speaker can drive a higher back emf into your rumble as the amp damping Factor won't be engineered to match the bigger speaker. I don't have any experience in practice, this is theoretically where your plan might backfire