A post-phase-inverter master volume (PPIMV) can work really well with this circuit to dial it down to lower volumes, though you lose the effect of the presence control at lower settings, and it's still not exactly the same sound as cranking it with no master. I built an amp for a guitarist friend a while back, based on the 1987 circuit but in a 1x12" combo cabinet. While the PPIMV is effective right down to practice volume, I'd suggest that it might be too much amp unless you're regularly playing very loud gigs. He's never had his above 50% on the master even in larger rooms, and it'll be even louder with a 2x12" or 4x12".