Originally Posted by Planobilly
Deep Purple was the loudest band I listened to live back in the day. Some other band had a painfully loud flute, most likely Jethro Tull but I don't remember. Golden Earring had a flute player but all I remember was Radar Love with a bass line Bass Thumper likely remembers.
The active crossover network in the drawing is perhaps a better way to do things for a really loud bass. The Sun cabinets would sound better if the low-frequency had 15-inch speakers. I assume 12s in the drawing.
Smoke on the Water was a smash with me and my "crew", I can understand how Deep Purple could blow the roof off. And I haven't listened to Radar Love in years, another great one.

I don't know the speaker size in the diagram, I just scraped something that looked reasonable.

At the risk of letting my imagination go too untethered, here is how I like to envision the interaction.

The Ox stood in the dimly lit pub with his favorite guitar tech and a few industry executives, his leather jacket creaking as he crossed his arms. He finished up his pint and slammed his tankard on the pub table. "Look, mates," he began, his British accent cutting through the smoke-filled room, "I've been lugging around your amps for years, and they're just not cutting it anymore. Every gig, it's the same story—distortion where there shouldn't be and my high end is practically non-existent. I need gear that can handle the raw power of rock and roll, something that won't crumble under the weight of a proper bass line. We’re talking about pushing some serious air. I need something that can keep up with Pete and I’ve been thinking about an approach I call Bi-Amping. If you can't deliver what I need, I'm afraid I'll have to take my business elsewhere. My fans deserve better, my band deserves better and I deserve better. Call me when you got something for me to test and we’ll work out the bugs.” The executives looked at each other with embarrassment written on their faces and one of them said “You got it mate; we’ll be in touch.”
smile

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For me there’s no better place in the band than to have one leg in the harmony world and the other in the percussive. Thank you Paul Tutmarc and Leo Fender.