As many note, when the speaker impedance is low, more current is needed to maintain the same power (watts) level. Generally, the lowest impedance is in the bass range, where you want to have maximum power available.
I notice that when I use a high current capable amp, such as a NAD or my Adcom, the bass sounds deeper and more full on my 4 ohm speakers than when I am using a receiver that does not have the same current capacity. For Class AB amps, weight is a good indicator of current capacity (heavy transformer).
As many note, when the speaker impedance is low, more current is needed to maintain the same power (watts) level. Generally, the lowest impedance is in the bass range, where you want to have maximum power available.
I notice that when I use a high current capable amp, such as a NAD or my Adcom, the bass sounds deeper and more full on my 4 ohm speakers than when I am using a receiver that does not have the same current capacity. For Class AB amps, weight is a good indicator of current capacity (heavy transformer).