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mediumraresteak replied to the thread Sennheiser HD800 Certificate for Frequency Response Arrived.Email Sennheiser customer support with SN and model. Took them about a week cause of holidays but normally 1-2 days.
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mediumraresteak replied to the thread Sennheiser HD800 Certificate for Frequency Response Arrived.Here's mine from years ago. No 6k peak.
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