Double Bass More Growl

[Dad Bass]

I have a Christopher 200 laminate bass with Spiro Mittels on it.
The sound is good but I'd like more growl. Are the lighter strings more growly?

Thanks for your time.

Dad Bass

 

[Francois Blais]

It's also a matter of setup.
Action height, fingerboard scoop.
Also the technique.

 

[jmpiwonka]

so many variables...

 

[Paul Warburton]

You might get more growl using the Thomastik Orchestras.
Pay attention to what the other guys are saying though!