DF is limited by the inductor in series with the woofer to about 100. DF of an amp should be few times higher. Very high DF=4000 (Icepower) doesn't make much difference - at least at low frequencies. Low output impedance at higher frequencies helps to cut interaction between tweeter and midrange (especially with biwired speaker).
Power itself is not important - sound is. In order to get twice louder you need ten times more power.
Don't buy an amp for the specifications - buy it for the sound!!!
Power itself is not important - sound is. In order to get twice louder you need ten times more power.
Don't buy an amp for the specifications - buy it for the sound!!!