NHT 1A Factory OEM Tweeter, 11-002-02 NHT Factory OEM Tweeter, 11-002-02 Size: 2-7/8", Hole cut-out: 1-7/8", Depth: 7/8" Voice coil: 1/2" Ferro Fluid Cooled, Magnet: 3 oz shielded Specs: Impedance: 6 ohms, Re: 4 ohms, Power: 20 watts RMS, 40 watts max, Response: 5 kHz - 20 kHz, Sensitivity: 88 dB