Boss Audio NX424 Onyx 4" 4-Way Speaker: * Power Handling: Peak 250W * Impedance: 4 ohms * Frequency Response: 85Hz - 20KHz * Cone Material: Poly injection * 1" aluminum voice coil * 2 x 1/2" Mylar tweeters * Midrange 1-1/4" Mylar cone * 2" mounting depth