I’ve been using the Noble since January 2019. Prior to that, I was using Bergantino B|Amp, Aguilar SC500, and Aguilar db750. The db750 is still use for certain larger gigs.
When I got the Noble, I was running it through the effects return of the B|Amp, until about 2021, when I was using the effects return of the Mesa D800+. Regarding the B|Amp, I loved the features, but never really got on with the amp’s tone. There was no comparison between the B|Amp;s built-in -ramp and the tone of the Noble. My bass just sounded so much “alive” and richly detailed once I began using the Noble (and I say this as an unabashed Bergantino fanboy!).
The Jule M-500 presents a nice simple platform for the Noble to run through — although to be honest, I’m not sure there is any sonic difference between using the Jule versus using the effects return of another Class D amp like the Mesa D800+ or B|Amp. I’ll have to do a head to head comparison for more insight!