Hello, I haven't played in a band in awhile. When I was playing out, I only ever had 100 watt tube heads. Mostly I used a 5150. I easily has the ability with a 4x12 to be very loud in the mix and retain the dynamics of my playing. I felt very present and immediate when using this amp. I have since moved into an apartment in a major city and I'm 40 floors in the air. Getting to my car alone is pain, with a full weight 100 watt head and a 4x12 this would be a nightmare. Im looking at 40 watt engl amp heads and am contemplating getting a 2x12. I know this would be loud enough for practice but I am curious if I could still retain the punch and full sound of a half stack 5150. If not, what would the differences be? I never had the 5150 past 4 no matter how big the venue. I also don't comprehend the research I'm doing online stating it depends on the size of the venue. This makes no sense to me. If you are mic'ed in the PA what difference would it even make at this point? Anyway, just seeking some input on obtaining a 40w amp head and a 2x12 for a full metal sound Another question, what would be the the tonal difference between using a single 4x12 or two 2x12s? This would also be an option.