Power Rating (RMS): 7.5 watts continuous Frequency Response: 250Hz to 14kHz Impedance: SPT5A — 25/70V SP58A — 8 ohms Sound Pressure Level: 105dB @ four feet on axis with 7.5 watt input @ 1000Hz Dispersion: 120º Sensitivity as Microphone: -22dBm [Ref: 10 dynes/cm2] Dimensions: 6" Dia. x 4" D Weight: SPT5A — 2 lbs. SP58A — 1.25 lbs. Finish: Textured mocha enamel Impedance Selector Switch Settings: 25V @ 1, 0.62, 0.31 watts (SPT5A) 70V @ 7.5, 5, 2.5, 1.25, 0.65 watts Sound Pressure Level in dB @ 1000Hz: Watts ----- Feet on Axis Input: ------------ 4' 8' 16' 32' 64' 7.50W — 105 99 93 87 81 5.00W — 103 97 91 85 79 2.50W — 100 94 88 82 76 1.25W — 97 91 85 79 73 0.65W — 94 88 82 76 70