A good entry into SQ without the expected cost. These entry level SQ components punch way above their weight and deliver something amazing for the price. Polypropylene cone, rubber surround and stamped steel basket on the midbass, 25mm silk dome tweeter with an integrated steel grille. Manufacturer provided specs: Nominal impedance: 4 Ohm Power handling: 60W RMS Sensitivity: 89 dB Frequency response: 65-22000 Hz Voice coil diameter: 25.5mm woofer, 25.4mm tweeter Midbass Qts: 0.875, BL: 6.961T, Vas: 4.78L Voice coil wire: copper Magnet system: High grade ferrite for the woofer, neodymium for the tweeter Mounting depth: 64mm Our own DATS measurements: Right out of the box, no run-in. Woofer: Re: 3.164 Ohm Fs: 68.47 Hz Qts: 1.05 Qes: 1.288 Qms: 5.683 Le: 0.2781 mH at 10kHz BL: 4.01 Cms: 0.355 mm/N Mms: 15.22 g Vas: 8.519 L Sensitivity: 89.19 dB 2.83Vrms Tweeter: Re: 3.377 Ohm Fs: 1181 Hz Qts: 1.106 Qes: 1.943 Qms: 2.567 Le: 0.03085 mH at 10kHz What's included: 2x Woofers 2x Tweeters 2x High-pass tweeter wires 2x Straight spade wires 2x Angled tweeter pods 2x Flush mount tweeter pods