I'm confused by the Line 6 web site as it redirects a discontinued bass rack effects to the new HD Pro which I understand is not designed for a bass guitar. Can anyone point me to the most current top of the Line 6 product that's rack mounted and designed for professional bass guitarists used live on stage? I currently own a Boss GT-6B and use it through a DBX limiter into FX loop of Ampeg SVT-3  Pro. Thanks!