27mm High Definition aluminium/magnesium alloy dome tweeter with a wide, soft polymer surround designed to give high stability without magnetic fluid damping. The dome and surround materials give high consistency and excellent stability against variations in air humidity. The diaphragm is protected by a highly perforated hexagrid carrying an acoustic lens which tailors the high frequency roll off characteristic. The voice coil is wound on an aluminium voice coil former with adequate ventilating holes to eliminate noise from internal air flow. A stiff and stable rear chamber with optimal acoustic damping allows 27TBC/G to be used with moderately low crossover frequencies. The chassis is precision moulded from glass fibre reinforced plastic, and its front design offers optimum radiation conditions.
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