Just got my Neptunium. Super fast shipping, considering it was backordered when I pulled the trigger Saturday night! It sounds great, but I learned very quickly that it does NOT like 12v. I thought I read somewhere that it needed 12, so I set my cioks sol to give it 12. The 1/4 input volume knob was super noisy, the pedal fuzzed out with the knob around 11 and didn’t do anything past 12. I switched back to 9v and it’s all good, works like you’d expect it to. Once that was out of the way, I got to try it out and it sounds great! HPF on, bass at 12, treble at 9 seems to be my sweet spot for now.