Tweeter for Roland KC 300 KC, 350 3-1/2" x 3-1/2" Compression Horn Tweeter SS Audio Compression Horn Tweeter for Roland KC 300, KC 350 Size: 3-1/2" (4-1/2" diagonally), Hole cut-out: 2-3/4", Depth: 2-1/2" Magnet: 8 oz, Voice coil: 1" Ferro Fluid Cooled Impedance: 8 ohms, Re: 6.8 ohms, Power: 40 watts RMS, 80 watts max, Response: 4 kHz - 20 kHz, Sensitivity: 100 dB Fits Roland: KC-300, KC300, KC 300, KC-350, KC350, KC 350, SPK-350, SPK350, SPK 350, VGA-7, VGA 7, VGA7, 5100027010, and many more