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Adjusting In the box HD 300 PRO or HD 300 PROtect HD 300 PROtect Cable Limiter Activegard ActiveGard T10 / TX9 Sennheiser electronic GmbH & Co. KG Am Labor 1, 30900 Wedemark, Germany, www.sennheiser.com Printed in Germany, Publ. 07/18, 578649/A01...
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Ear cushions Specifications Headphone HD 300 PRO / HD 300 PROtect Acoustic principle dynamic, closed Ear coupling circumaural Frequency response 6 - 25,000 Hz Impedance 64 Ω Power rating 500 mW ± Sensitivity 3 dB SPL / 1 V / 1 kHz HD 300 PRO Max.