The most cost effective power related tweak I got was with a Monarchy Audio Regenerator. For about $700 it costs just as much as a decent power cord but the effect it has on the sound quality is just tremendous, Dynamics and realism take on a new meaning!! No power cord can do what this device does. I agree that a good power cord further adds to the effect but the majority of it comes from this regenerator. In fact one can happily use an average power cord with this regenerator and enjoy top quality benefits (that one can have from power refinement).
It is a 100 watt regenerator with an headroom of 150 watt so one can use it with Transport, DAC and Preamps/Integrated Amps as long one doesnt cross the 100 watt limit. However as others have suggested here, it is best to isolate digital from analog components hence the regenerator have the best effect if it is only connected to digital equipments.
It is a 100 watt regenerator with an headroom of 150 watt so one can use it with Transport, DAC and Preamps/Integrated Amps as long one doesnt cross the 100 watt limit. However as others have suggested here, it is best to isolate digital from analog components hence the regenerator have the best effect if it is only connected to digital equipments.