I have a GK 1001 RB and an SVT 810E cab (a newer one, the speakers read "Eminence, made in China"). I play a 2008 American Standard five string Jazz. I am having troubles getting a good tone, in fact I can't really get anything good out of this set up. I often play with the bridge pick-up featured, I like that burpy sound, I run the bridge pu full, the neck at 50% and the tone at 70%. This is a main staple for me however on this set-up (GK & 810E) it sounds dull. I also play with both pick-ups at 100% and the tone either full or at 80%. This sounds muddy with this amp/cab combo. Now here is the good thing - this cab rocks, the bottom is tight, for a cab with stamp steel basket drivers it really impresses me, it can really take a lot of power and seems very effecient. Is it my imagination but do these cabs lack clarity? I like the feel of my Jazz Bass, some say the pick-ups are less than "to be desired", they sound good to me. I'd like to hear everyone's oppinion, please chime in, what are your thoughts on the cab, head and bass? I have the chance to but an Aguilar AG 500SC - will this make things better? what are your thoughts on this? I once read a thread on Talkbass by a member named "Kjung", he seemed to know everything about Aguilar AG 500's, very knowledgeable. I also have the opportunity to purchase a Mesa Boggie Bass400+, are these any good??? I have heard they are bright sounding - this might be good with this cab? I oncle played a late model (2009) Jazz bass (maple neck) through an Eden 410 xlt and a Time Traveler 405 head - set flat with 20% enhance, I was blown away by the tone, it was awesome, how do I get this tone from my 810???