Amplifier current vrs watts; why is current more important?

Similarly, extra current (if it were somehow to exist) does not affect bandwidth. What **does** affect bandwidth is output transformers; generally speaking the bigger you make them the less bandwidth you get.

This seems to be limited to tube amp which requires an output transformer.  Interestingly, atmasphere specializes in OTL tube amp which does not need an output transformer.  But this seems to be getting away from the OP original question.  

Andy2-you were a little off on your car comparison. Wattage/current is kind of like a car horsepower/torque. Torque is your bottom end power. Torque will get you off the line much faster or when you want to pull away. Some cars could have decent horsepower with low torque and that means its gets off the line slower, no power to pass, and all the horsepower is at a higher rpm. Your Sony/pioneer amps might have a decent wattage rating but no current to drive the lower end or react instantly to high peaks

rbstehno,

I guess no analogy is perfect!  It's up to one's choosing.  

Amplifier current vrs watts; why is current more important?

KEEPING IT SIMPLE.
Amps with big watts and little current alone don’t drive speakers with low impedances and stay flat in frequency response, amps with big current do.

EG: One of the worst low impedance speakers ever made, the Wilson Alexia v1, they go down to 0.9ohm in the bass.
A 500w stereo P.A. amp or a 500w Class-D will work into them to a point only, but will sound like a tone control.
 
But a monoblock amp like the "Legendary" old Mark Levinson ML2 monoblocks that are only 25w!! into 8ohms, will sound better into them, because it’s said they double their wattage for each halving of impedance all the way down to 1ohm with the current it can generate, so they will stay flat in frequency response, where the 500w’ers will sound like a tone control.

Cheers George

Here is proof to what I posted above, and the speaker load in both instances, is a very easy to drive Kantor simulated speaker load, a bad load will look far worse.

Look at the black wavy line.

This is the well known Prima Luna Prologue Premium 25w tube amp with very questionable current.

8ohm tap + - 7db!! frequency response, "a tone control"
https://www.stereophile.com/images/1116PLPPfig01.jpg

4ohm tap+ - 5db!! frequency response "still a tone control"
https://www.stereophile.com/images/612PPPfig01.jpg

Here is the Pass XA25 25watter with far more current that the PL above, it’s +- 0.1db frequency response. Virtually flat as it should be!!!
https://www.stereophile.com/images/218PXA25fig1.jpg

Cheers George