Our guitarist recently used a Line 6 Spider modelling amp while his Marshall was being repaired. Some amps sound amazing, most sound pretty decent but this thing fits in to the rare category of absolutely bloody awful. After half an hour of fiddling he couldn't even make it sound half way acceptable. All I could hear while we were playing was an unpleasant white noise, I couldn't make out any actual notes at all. He ended up switching to the old Marshall 4x10 bass combo in the corner of the studio which is terrible but did a better job than the Line 6. He wasn't even pushing the amp, all his distortion comes from pedals so most amps do a reasonable job for him but not this sorry excuse of an amplifier.