DACs and bass response?

I'm using an Ayre QB 9 DSD and I've added a Regen ISO with the the optional linear power supply. I replaced the fuse with a Synergistic Research Black and attached an Akiko Audio XLR tuning stick to the Ayre DAC. These tweaks have made my DAC sound (to me) more natural, more balanced and with a greater degree of presence. I never up-sample, as it isn't necessary nor is it preferable. 
Doing this would probably alarm many however, I've tailored these tweaks to my own hearing. I would however appreciate slightly faster bass with more melodic structure whenever I'm listen to music options other than classical music and so I'm considering the new Synergistic Research Blue fuse for the Ayre. Is anyone using the Blue fuse?

It’s hard to believe that a DAC designer wouldn’t use effective caps in their design. Before changing out caps, why not try a signal re-clocker and a high end fuse and maybe, up sampling? I’m not trying to over simplify this but most audio enthusiasts lack the ability to evaluate equipment via scientific measures. Some may have higher standards but I’ve always trusted my ears.

gdhal, based on my experience, everything matters at varying degrees. When I recently replaced gold plated locking banana plugs with silver plugs on my 6 gauge speaker cables, the clarity and detail improved exponentially. The benefits to my recently added ISO Regen and LP1 proved beyond what I could have predicted. I really wasn't expecting a difference by changing my banana plugs from gold to silver.
However, it seems as if dealers and distributors will tell us that what we need, are whatever cables they just happen to be selling. In other words, I believe it to be difficult for hobbyists to determine exactly what they want or need in their stereos, especially in an age where most consumers will make purchases via the internet rather than making comparisons in the dealers show room. As funny as it might seem, I recommend that audio enthusiasts read about aesthetics and music theory in order to find their solutions in equipment, tweaks or upgrades. After all, isn't this about musicality? Happy Holidays.

stuartk, there's of course nothing definitive about the term musicality, it's subjective and ever changing but I do believe that having a certain amount of musical knowledge is an asset. I'd never advocate for, checking your brain in at the door. For me, harmonic theory and aesthetics act as a road map for what I want to hear and for what I am listening to. 

gdhal, it's good to be at a place of sonic bliss and contentment. We foremost need to enjoy this hobby.