Re: What's the point in big 100 watt heads?
They do not work well in a modern setting with advanced PA systems.
Exactly right- FOH engineer's job is to get the best possible sound for the audience and stage leakage is a real problem in small and midsized venues where most events occur-
1. Biggest problem is monitoring- Everyone knows this from their first garage band- you turn up to hear yourself, bassist does same, keyboardist does same and you overpower the vocal monitors, so engineer has to crank monitors and starts mic feedback loop.
2. Balance is another biggie- one side of audience gets to hear the stack that is closest to them and can't hear much of anything else.
3. Similar problem is they need to eq your amp to fit the room and can't do that if the stage is louder than the PA. Same problem with total volume- arrayed speakers give engineers incredible detail opportunities that get blown away with stage noise.
4. Same thing with phase cancellation, reflections and time delay in big venues
There's another thread running about modeling amps vs. tubes- The best FOH engineers I've worked with prefer modeling or an iso cabinet so they can tailor the sound and avoid all of the leakage- As much as l like my tubes, I will leave them at home if I know the audience is getting a great experience (and it's a trusted engineer who will give me a good monitor mix).
Mincer nailed it- we love the look of a wall of stacks, but it's visceral, not the best way to get a good sound, but most of us have done it.