Well, as I told u, yesterday I had a gig in a jazz setting with my brand new Hartke Hydrive 5210 combo. Definitely, it didn't work. With my bass onboard volume knob at full, I need to turn clokwise my amp volume knob to 5, then to almost seven on a ten scale in order to cut through and be hear. The speakers moved a lot at every note, and the last songs I played sounded distortioned... I suffered at the end. For sure, there's something wrong with my unit: my combo gave me 100 watts, or 120 maximum: never the 350 watts it claims!
I feel disappointed, of course, and I've just bring the combo to the music shop. I don't want the same combo, so I'll try to make an exchange for another cabinet. Definitely, I don't like the LH series: just a master volume to control your overall sound. My old trusty classic 350 watts Hartke amp is far more reliable and gives more sound flexibility.... and power also...
Thanx everybody for your replies!