I was in the studio today and was playing around with the PA systems eq section while on break (I play through that in paractice and D.I during gigs). The system I was using has a shelving 'dip' button for 80hz to attenuate anything under that frequency. I found that with everything flat there didnt seem to be very much of a difference at all. Also the treble (12khz) and high mid (2khz) didnt seem to alter the sound either (cut and boosted by 15db). Does this mean that with volume and tone on full my guitar range is 80hz to 2khz? Is it only an active bass that goes into treble/tweeter territory? I play a Yamaha BB424 with the P pickup selected and both tone and volume wide open. Just wondered what others experience is with this? Thanks.