In terms of components, digital is so far behind analog I didn't even bother trying these in my CDP. So no idea really about the DAC. The biggest most clear cut improvement was in my Melody tube integrated amp. Coming in a fairly close second was my Herron VTPH 2A. That leaves my Teres Verus motor controller trailing a distant third, which given it uses 2 fuses if there was one I would do without (or maybe try somewhere else) its that one.
So with my three it seems the stuff with the greatest current demands improves the most. In the best case amp situation the magnitude of the improvement is on the same level as upgrading to a much better power cord. Considering the minimum on that is about $300 for a use Synergistic Research Master Coupler at about twice the price of a Blue Quantum Fuse, the Fuse is definitely worth it.
So with my three it seems the stuff with the greatest current demands improves the most. In the best case amp situation the magnitude of the improvement is on the same level as upgrading to a much better power cord. Considering the minimum on that is about $300 for a use Synergistic Research Master Coupler at about twice the price of a Blue Quantum Fuse, the Fuse is definitely worth it.