Peerless DX25BG60-04 1" Textile Dome Tweeter w/ double magnet (Also know as Vifa D2604/8330)
This DX family tweeter features a 4 ohm 25 mm ferrofluid-cooled voice coil, a damped silk diaphragm with large surround roll to produce a low resonant frequency, and a big ferrite magnet motor for power handling capacity. The faceplate features recessed mounting holes to minimize reflections.