Comments on: HiBy R6 Pro II Review https://headfonics.com/hiby-r6-pro-ii-review/ Independent Portable and Desktop Audio Reviews Sun, 14 May 2023 08:45:45 +0000 hourly 1 By: JT https://headfonics.com/hiby-r6-pro-ii-review/#comment-16860 Sun, 14 May 2023 08:45:45 +0000 https://headfonics.com/?p=63783#comment-16860 In reply to Jon.

Hello Jon, the HiBy R6 Pro II is specifically engineered for sensitive IEMs, as reflected by its power ratings. However, the HD 660S2 has an impedance of 300 ohms and may not be the most suitable match for this DAP. To achieve optimal performance, it is recommended to use a desktop amplifier with these headphones.

]]> By: Jon https://headfonics.com/hiby-r6-pro-ii-review/#comment-16859 Sun, 14 May 2023 07:26:04 +0000 https://headfonics.com/?p=63783#comment-16859 Hi James.
Great review. Do you think this could drive the Sennheiser HD 660S2s?

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