Audiophilepure

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“The first are two little air vents at the top and bottom of each cup baffle. These vents act in the same manner as speaker ports (rear or front) with the vent on the base tuning the woofer and the top vent for the 40mm crossfeed driver. Put your finger over each and the level of bass and air will be affected changing the sound also. It also lowers the level of isolation from background noise.

The second are those silk/velour triangular pads used on the CZ-1. They are fairly porous in nature as are most velour pads in my experience. They do a good job with high-frequency background isolation but less so with mid to low frequency such as air con hum. Though not quite as open as proper open-back design the CZ-1 is still a headphone for indoors and quite listening sessions.”

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