Hi all. I've a couple of questions about jazz double bass amplification by Schertler Dyn-B.  
 
Has anyone compared the old Schertler Dyn-B and the new Dyn-B-P48 ?  Is there any difference in sound?      
 
Has anyone used the Dyn B with a SR Technology combo?  I'd like to know your opinions about SR 300BB, SR Jam 150, SR Jam 400, SR Bass Fidelity 10.  
 
Thank you. 
Fabio