Internally, nothing has changed apart from some quality-of-life upgrades in the chassis in which it inhabits; the S9 PRO Copper Limited Edition has taken similar footsteps. Any noteworthy changes are purely visual or build-related.
While the novel inclusion of a high-density CNC aluminum shell is a welcomed addition to an already good product, does it warrant the extra $50 dollar premium?
The S9 PRO Copper Limited Edition (like the S9 Pro) proudly boasts the ever-so-reliable ESS9038Q2M DAC, a 2 channel DAC designed by industry favorites, ESS Technologies. As mentioned previously in my S9 Pro review, the S8 can pump out 100mW into 32 ohms from its 3.5 single-ended out, and 200mW into 32 ohms on its 2.5mm balanced out.
Moreover, the S9 PRO Copper Limited Edition boasts some impressive measurements under the hood (Total harmonic distortion), at 0.0006%@32ohms in the 3.5mm out, and 0.0012%@32ohms.
Lastly, the S9 PRO Copper Limited Edition is compatible with all digital music formats, including the data-heavy DSD-64 and MQA. For more technical information, feel free to refer to my previous S9 Pro review.
The S9 PRO Copper Limited Edition shares an identical form factor to the S9 Pro. Structurally, there are no observable changes, and it still retains the S9 Pro’s distinctly monolithic appearance.
The lack of physical volume controls and the previously discussed balanced and unbalanced outputs are still situated at the same points on the S9 PRO Copper Limited Edition.
However, as the name implies, the S9 Pro Copper Edition adopts a copper colorway (thanks, captain obvious). Subjectively, the S9 PRO Copper Limited Edition has an ostentatious demeanor that gives it an expensive allure.
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