allright... my current setup is... trace elliot 200 watt head @4 ohm. an old 1x15 combo-turned-cab warwick with an eminence speakter (200watts at 4 ohm). and my beloved bass - oak/maple/emg 7 kg monster. the tone i get from it is almost perfect for my blues band - gives a lot of wallop - extremely defined and powerfull lows, with a lot of signature tarce elliot midrange grind. i have no tweeter so the higs are not quite there, but that doesn`t bother me. the problem is, that a single 1x15 is not to fast, and it tends go get a bit muddy while playing faster stuff - i think about adding a 2x10 or maybe replacing the 1x15 with an 4x10. So my questions are, 1. can i modify my cab from 4 to 8ohm, so I can connect it to my head with an additional 2x10 cab? is that a common procedure for a amp tech? if yes, will the 2x10 help me with my problem? 2. if no, could you recommend a 4x10 cab wich wouldn take too much of my low end, and be a little more precise?