Audison Prima APX 690 6x9" Car Coaxial Midbass Shelf Door Speakers 100w RMS PairPrima APX 690 Coaxial 300 W Peak Power 6 x 9 4 ohm The APX 690 features an exclusive 40 mm horn loading dome tweeter that contributes to maximize efficiency up to 96dB SPL and an acoustics lens specifically designed and applied to the tweeter to increase dispersion in the high frequency range. Horn Loaded Tweeter: 40 mm horn loaded dome tweeter contributing to its incredible efficiency of up to 96 dB SPL. Acoustics lens applied to the tweeter,