JBL ONE 2-WAY 61/2" ROUND IN-CEILING SPEAKER Description - 2-Way 6-1/2 In-Ceiling Loudspeaker Series - Studio L Series Frequency Response (-10dB) - 30Hz - 20kHz (+-6dB) Max. Recommended Amplifier Power - 10 - 125 watts Sensitivity (2.83V/1m) - 89dB