Since 80% of the power/voltage is in the bass, AND speakers tend to have an impedance dip in the 100-150 Hz range you want the bigger, stiffer amp in the bass.
However, since most amps are fixed gain (26 dB) if you mismatch by a lot, say, 200 W bass, 10 W tweeter/midrange, you can still overload the top end amp with too much required voltage swing, you'll have clipping anyway.
So try to keep your amp power ratio at most 2:1
However, since most amps are fixed gain (26 dB) if you mismatch by a lot, say, 200 W bass, 10 W tweeter/midrange, you can still overload the top end amp with too much required voltage swing, you'll have clipping anyway.
So try to keep your amp power ratio at most 2:1