I use this speaker on a 3500 head HA of the same brand, and coupled with a 15 'Ampeg.J' branch to an Ibanez SR400 4 string with active EMG pickups. The style played on the loudspeaker is essentiellemnt of metal, but I play very often play a slap. I replaced my old Hartke VX 410 for this one because the VX had trouble cashing a deep bass at high volume, and the dynamics of the head. I played on an "aluminum cones" (the XL 410, so) for a concert, and I found that the power output was very good, and the precision of the game and for the price (especially used) I did not hesitate for long.

SOUNDS

In terms of sound reproduction, I find the speaker and the height of the power and dynamic as the head sends him. The VX was going where my hand, the XL is the grave, retains its punch and the slap is a real jackhammer! Depending on the desired, one could criticize his lack of heat. But the precision is gained is a little to the detriment of the roundness. That's why I kept my 15 'Ampeg, which bring this "fat" is missing.

OVERALL OPINION

I use it for a very short time, but I had already tested concert condition, and I heard some running. What I like is the potato (97 dB sensitivity) and the sort of slight "growl" to the attack of the strings produced by the aluminum cones. It makes me think about how to manage head Ampeg frequencies. What I like least is the weight of the machine! 40 kgs! But we feel that the cabinet is something to do with the patch. Very good value for money, like any self-respecting product Hartke ...
I almost bought a place a Ampeg 4x10, but after hearing the XL, and after reflection, I chose this one to combine punch and roundness through my config. So yes, I do it again this choice.