well, a dead match isn't needed for solid state, just don't go below the minimum impedance (and even then you might not break the box of transistors if tis well-designed, you obviously didn't blow that combo up), you are just losing wattage with each 100% mismatch upward, but as you were putting high into low you probably almost DOUBLED your wattage... plus, if that cab was an OLD crate 2x12 with Fane speakers or Pyle Drivers like they used in the 80s sometiems then the speakers were MASSIVELY efficient, at least 100dB of sensitivity, hell, even the eminence speakers they used back then were pretty loud
things ae deicidedly pickier in the tube world because of the output transfrmers and things are also more complicated as regards the effect ofimpedance on wattage...
but the other thing to realize is when you play games with impedance you can potentially effect frequency response and even introduce distortion you might not otherwise hear, and that goes from your instrument jack to speaker jack... every connection is designed for a certain set of impedance conditions, some will be very narrow in what they will tolerate while stll functioning as designed, other stuff will totally bug out if you screw around with mismatches (no top end, crazy oscilations, weird distortion), and some stuff will put up with a lot while still sounding pretty much as it was intended to with normal use... as a rule MOST guitar and bass gear is designed to be pretty tolerant, but gear designed for other purposes may not be designed to play well with guitar and bass stuff.... guitar and bass electronics are a holdover from an older standard of audio electronics, things changed a lot in the 60s as theory advanced in-step with the needs of broadcaster, recording engineers and the (then new) sound reinforcement professionals... but guitar technology stayed pretty much the same and because it took another decade for guitarists and bassists to worry about interfacing directly with gear not specifically designed for them, the 60s pretty much just saw the introduction of the DI as a Band-Aid o help us interface with all this new stuff... and Gibson/les paul tried low impedance pickups in the little-known les paul recording model (Les' favorite solidbody), but when alembic pioneered active systems they were worried about driving long cable runs on festival stages but focused on driving an instrument amplifier since no one relied on the PA back then
I digress
don't feel bad, it took me til I was in my 20s to really start to 'get' electronics, before that I was a decent musician who could solder as long as there was something obviously broken that I could SEE... it helped to make a bunch of records for other people and really spend a lot of time with all thosec crazy electrons... I wouldn't think of electricity as a river or a cable as a pipe and gear as a valve per se, but I ehar a lot of people use that analogy and I think its misleading and confusing.... you might want to find a basic book that's actually written for musicians, that helped me a lot as did looking at the history of electronics. Being a bit of an antiquarian, relating the evolution of electronics in the 20th century to the evolution and development of modern musical forms that employ all this technology really made it exciting and interesting for me VS just diving into text books right away. The right text books are a lot more engaging when you have soe historical sense to everything you're reading.
whats funny s that in the studio particularly, I often throw out the rule book and misuse gear, but I have an idea what results I will get before I start because I learned the 'rules'. My curiosity really got going when I would screw things up while making records and ask myself "now why did that happen?"