Ambisonic Systems Model 6.5HD-AW-L – The Model 6.5HD-AW-L incorporates a 6-inch planar magnetic ribbon driver arranged in a true coaxial configuration with a 6.5-inch composite cone woofer. The passive 6.5HD-AW-L is rated as an 8-ohm product that dips just below 6 ohms. The 89dB efficient speaker is rated to produce a frequency response of 50Hz to 20kHz. Ambisonic houses the drivers along with an advanced 12dB Butterworth crossover network in an all-weather, trapezoid-shaped composite IP-65 rated enclosure. The speaker ships with a mounting bracket. ambisonicystems.com