Supplied as a pair with grills 2 tweeters and 2 crossovers rms power 75 watts peak power 225 watts minimum input 35 watts rms sensitivity 88d b frequency response 60k hz 20khz mounting diameter 114mm mounting depth 54mm voice coil diameter 25mm magnet material ferrite magnet weight 10 oz magnet size 80mm x 12mm magnet rating y30 recommended amplifier fl400sfl900s see more product details