I have the TT-800 - Here is how I'm going to run... I'll only take the TT-800 when I need an amp and cabs (poor monitoring/no monitoring or no ability to run IEMs.) The Subway+ II will be on a nano pedalboard with a tuner and a fuzz pedal. For IEM/ampless gigs, this what I'll roll with. (Battery powered too - no fussing with long IEC/extension cables.) While I love the TT-800 - absolutely my favorite amp - the audience won't hear the difference live through a PA system. If anything, having a silent stage will make the bass sound better due to no phase or other issues. Both guitarists are finally in the same boat - amp only if we have to.