Seas loudspeaker tweeter NOFERRO 900 G/TV 27 TBC/GTV 27TBC/GTV is a High Definition metal dome tweeter with a wide, soft polymer surround and a shielded magnet system with a rear chamber. Aluminium/magnesium alloy diaphragm with pistonic behaviour throughout the audible frequency range, resulting in a good dispersion also above 10kHz. A Hexagrid protects the diaphragm, and supports a phase plate which compensates for a slight axial roll off towards 20 kHz. Sonomax surround for low resonance, excellent mechanical linearity and stability without magnetic fluid damping. A shielded magnet system allows use in close proximity to CRT screens. Using the screening can as a rear chamber with optimal acoustic damping allows the tweeter 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.