Energy
Member of the Trade: Artemis Fidelity
Agreed with @bflat . Even when using the SU-1 or ISO REGEN, I can't hear these improvements from other headphones unless I were to use the Utopia.
Some people might need a pair of headphones good enough to reveal the quality of their upstream components.
Some people might need a pair of headphones good enough to reveal the quality of their upstream components.