I've been using my R-600 bridged to a 4/10 cab. I just picked up an Ampeg SVT 15EN. My question is should I leave it bridged and connect the 15 to the 4/10 cab. Or bi-amp it. I would have more control if I bi-amp it, send the lows to the 15, and the mids and highs to the 4/10. But how will the volume be. The two cabs are 8 ohms each, so if I bi-amp them they will have 175 watts per cab. If I bridge them thats 4 ohms and the head will put out 600 watts. My g&k 4/10 is rated for 250 watts but I never played anywhere with the volume over 2 with that cab. I would like to know how some of you do it. Thanks for any help.