The Sinfoni S25T tweeter has a very soft dome, made of polyester and treated with a special acrylic resin which
doesn’t modify the structure when the temperature changes. To keep the Fs at low values the tweeter has, on
the back side, an insulated compensation chamber, avoiding so the use of ferrofluid. To ensure a good ventilation
16 holes have been made inside the magnetic section in direction of the voice coil, taking advantage of
the said compensation chamber. The magnetic section is made of a neodymium disk, plated at 150 C, not at
the usual 130 C, to avoid any possible magnetism lost. The voice coil: two layers of copper on aluminium
former; two silver wires, welded using the ultrasound technic, are used to connect the voice coil input.

Features

• Nominal Impedance 4 Ohm
• Power RMS 70 W
• Nominal Voice Coil Diameter 25,5 mm
• Sensitivity 1W, 1m 90 dB
• Magnet neodymium
• Dome polyester
• Surround polyester
• Voice Coil Winding copper
• Voice Coil Support aluminium
• Frame aluminium