In my system / findings of AC12 :
Excellent - into PPP
Good - into amp
Average into - front ends
When used in tandem, they have a tendency to compound and thicken the sound a little too much, hence loosing micro dynamic and detail. Neutral tonality, but balance wise do found them to be a tad colored - adds a bit of bass, body and fullness to sound - which might be a welcome in some systems. Generally, will perform better with bigger current load and in systems erring on lean side.
Excellent - into PPP
Good - into amp
Average into - front ends
When used in tandem, they have a tendency to compound and thicken the sound a little too much, hence loosing micro dynamic and detail. Neutral tonality, but balance wise do found them to be a tad colored - adds a bit of bass, body and fullness to sound - which might be a welcome in some systems. Generally, will perform better with bigger current load and in systems erring on lean side.