Phil Jones is one of the most honest bass gear manufacturers. He actually publishes measurements and charts. If at any time in the future you need to upgrade you can look at the measurements of what you have now, and think of how it works for you, then make an educated decision on what another model will do based on it's measurements. I wish more manufacturers published actual measurements. He also vibration and environmentally tests his designs. Why he doesn't promote this more is a puzzle, but the amps are solid and fit their purposes well.