yes bry frequency makes a world of difference the higher frequencies will ride on top of the low frequencies.yes in theory joecool and jm this is true , but in practice it isn't , it is true that between a 100 watt and a 50 watt amp you won't hear much difference in volume. I have a Marshall JMP and a MG10 and 2 1960 cabs if ya want to come and prove your theory Rock On
As a guitarist, I've come to realize, not that much power is really needed. My band is a basic old-school punk band. (we started playing in 1978) Drums, bass, guitar, singer (if you can actually call what he does "singing"). In the past, I would use an 80 watt, 80 lb Traynor Mark 3 combo. This thing could blast a Fender Twin off the stage, no problem. It was way too much power! I only had occasion to turn it above 3 once. That was at an outdoor gig at Nathan Phillips Square. I realized how much I hated hauling this 80 lb monster around. Now I use an old 20 watt Supro, a small combo with a single 10" speaker. It's so small, I can carry it to gigs in my backpack. I installed the best 10" speaker I could afford, an Eminence Ragin' Cajun. It's rated at 100dB SPL sensitivity. I've found this setup to be more than enough, even with an aggressive drummer. No problem being heard. Strangely enough, I'm still not turning this amp up much past 3. I would think that a 20 to 30 watt amp in a combo with something like the 12" Eminence Wizard (103 dB SPL) would be more than enough for any situation. In fact, I'll bet that a speaker like that could make a decently designed 10-watt amp be heard just fine.
A guitar pickup is similar, with it's "resonant peak" producing a characteristic tone.
Tube VS SS watts