Pro-Ject MaiA Integrated Amplifier 37 watts per Channel (at 4 ohms) and capable of driving speaker loads as low as 2 ohms Dual-mono design and low-noise smd circuitry for superior Channel separation and shortest possible signal path 24bit/192Khz XMOS asynchronous USB D/a converter Inputs: (1) phono RCA, (3) line-level RCA, (2) Toslink optical, (1) S/PDIF coaxial RCA, (1) Bluetooth (aptX), (1) USB Audio Quality motor-driven potentiometer for variable volume control of headphone, subwoofer, and second-zone amplifier outputs