I really don't think that is right. I mean, everyone knows about the electric Stradivarius. But now we're talking tubas. What could be cooler than a beat up horn? And a very big one at that? I think it calls for experimentation. Amplified experimentation. How about a Meyers pickup running through an Echobrain peddle, or the MXR Eddie Van Halen flanger, into a Marshall stack? Would that work?
Below links to Yuiko Onishi (Senri Kawaguchi on drums) playing her amplified saxophone. I'm not sure she's big enough for a tuba. But it might be something she could work out. And that would even be better than cool.
Do they make pink tubas? Or purple?
Hmmmm they are missing a tuba in that band!