although I am aware that bass amps need more wattage to compete with guitar amps, i wasn't sure how much. I recently was playing with a guitarist who was using a 30 watt combo amp (line 6 spider II). I had to turn my line 6 lowdown 300 (combo) almost all the way up, although the channel volume was relatively low. Does anyone know of a ratio for bass-wattage-to-guitar-wattage? feel free to discuss similar situations.