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I knew about the quality of Sennheiser microphones, I used to work in production and thats the only brand we used to record videos and interviews, didn't know they also make earphones!

Btw Cornerstone, is there a way to get in touch with you on Discord or Telegram for Hive governance related matters?

HD25 was the most common DJ set. Have a look around in clubs and you likely see those. Also hearing and acoustic consultants often use those as they seem to be benchmark.