Marshall Major IVMajor IV delivers the signature Marshall sound that youve come to expect. Custom tuned dynamic drivers deliver roaring bass, smooth mids and brilliant treble for a rich, unrivalled sound that youll never want to turn off.. Driver Impedance : 32 . Frequency Range : 20 20,000 Hz. 80+ solid hours of wireless playtime with quick charge capability only 15 minutes of charging will give you 15 hours of listening. These are headphones truly built for the long
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