It’s more the question on right sizing the amp or amps to the lower and upper terminals. Right now I’m using my 125w@8ohm receiver (4ohm capable so no worries) to power my 1723 Towers. Not ideal but is working well, no/low distortion until about 85-90 dB at MLP. (3×4 meter room, 12×16 feet) Trying to understand the physics of bi-amping so I don’t overpay for too much unused headroom. or if it makes sense to stagger purchases over time by buying separate components.
For example, If I get a 500w amp at 4ohms (like a Parasound A21, $3500 USD) running both terminals, could I instead bi-amp with 2 amps running 225w at 4ohms and 150W at 8ohms (two Parasound NewClassic 2125 v.2, $1100 USD each) separately to each terminal to have the same sound output (combined 375w).
It’s cheaper to bi amp if additive wattage, but I’m curious if it’s comparing apples and oranges in that they are not the same. I passed advanced physics class once upon a time, but it convinced me not to be an electrical engineer :-)