Actually, I was talking about unamplified instruments. The marching band that I heard had tremendous "impact". This same type of "impact" is also evident when listening to any "live" concert band in a hall. This presentation ( of impact) is something that I have NEVER heard reproduced, even closely, by ANY home audio system.
This is kind of like what I have read about the dynamic range of real life (...may not be true?)...for example, dropping a fork on a marble tiled floor can peak at nearly 120db for just an instant. A system needs to be able to flex instantly and easily i guess in order to properly reproduce the total range of dynamics and impact that occur with real instruments.
Its not about constant volumes...its about what the true, complete dynamic range is of, say, a snare drum when the mic is up close and recording. Multiply that by 12 performers on a stage...tambourines, bass, singer, few guitars, etc...or in Daveys case, a whole marching band.
How much juice on tap (and instantly on tap) would one need to get a system to approximate real life of even 12 performers? I have heard the Arrakis and Genesis 1 systems come surprisingly close on acoustic rock...to a level that made big Wilsons feel more like Sashas. Still not live though.