'- 2 x 50 watts RMS at 6 ohms,40 watts RMS at 8 ohms- Bluetooth 4.0 with AptX Independent Equalization & Balance Controls- Subwoofer connection to connect to powered subwoofers. Crossover: 500hz (master volume controlled by GDI-BTAR513 volume control)- 3.5 mm Aux In- Stereo Headphone Jack- Stereo Line output jack- Stereo speaker binding post- DC power in jack- External Bluetooth antenna connector- Input impedance: 47K ohms- Input Sensitivity: 500 mV- Frequency Response: 20 Hz – 20 KHz