I'm a big Marcus/Alex Al fan and that is the sound I like. I get it with my 74 Jazz that has a Sadowsky preamp a Ken Smith bridge (like a Badass only better) and Fender SCN pickups and a Hipshot Dtuner. It sounds ( and plays) incredible but I love the extended range of a 5 string bass.So for decades now I have tried to get that sound in a 5 string. I have bought and sold numerous basses and I currently own a Moon JB 5,a KSD that I modified so much that it isn't even the same instrument anymore and an Atelier Z, which after the changes I made to it gets pretty close to the sound I'm trying to achieve. In addition to that I have tried countless other 5 string basses. Mike Lulls, Sadowskys, the Fender MM5,Marleux Sandberg and anything else along those lines that i could get my hands on.I listened to zillions of youtube clips and soundsamples and no luck there. Now if you are just sort of into that Marcus thing and you heard me play my basses, you might say that I'm splitting hairs and that the tone is in my hands etc.and I certainly agree with the latter part of that.I can play pretty well and have learned a lot of stuff from listening to Marcus over the past 30 years and I can get really close.But just not close enough and to be honest, as much as I have experimented around,at this point I'm wondering if I haven't wasted a whole lot of time,effort and money trying to chase that tone.All that going back and forth, analyzing, changing components, setups... you name it, got me really close but when I pick up my 74 Jazz, the difference to me is huge. It's not that I don't have my own identity as a player, I don't want to be a Marcus or Alex Al clone. I just want a 5 string that gets that tone But at this point I think I have tried enough and I my opinion THAT sound in a 5 string ( or even in another Boutique type 4 string) is just impossible to duplicate.I don't know what it is, but nothing really sounds like a mid 70s Jazz. Now I'm playing my Jazz mainly and I'm working around the fact that it is only a 4 stringer.It feels good to play it, it kicks butt and I think I'm going to stay with it. I thought I might share my story with you guys.I can't be the only one here who's gone through this. Maybe we can start a club called: I tried to get that Marcus tone from 5 string, but I have given up! OK I'm number !