The name and appearance of the two Pro models are without question reminiscent of Beyerdnamic‘s classics. They are circumaural dynamic headphones with 40mm drivers with neodymium magnets, but they differ in construction: The HD-330 Pro is semi-open and the HD-660 Pro is closed. This affects sound, acoustic shielding and wearing comfort.
HD-330 Pro: Half-open and airy
In the HD-330 Pro, air exchange takes place through the perforated back panel, so heat buildupalso get a bit warmer on the ear under the velour pads. However, this is all within reason.
