For what is is, I love the v3 rumble 100 & 500 with the vintage switch. I don't see the point in modifying anything with the amp. It's a plug in and play amp, zero EQ necessary 99.99% of the time…. That being said my tube preamp DI / compressor is a factor in achieving the sound. I'll take my rumble with my pedal board set up over any Aguilar, Markbass, etc…only thing that's beats it is a B15…