Style: BluTube Original BluTube Bluetooth tube 70 watt amplifier/home theater stereo receiver BluTube audiophile grade tube amplifier with Bluetooth. 25 watts x 2 RMS @ 8 Ohm. 35 Watts x 2 RMS @ 4 Ohm. Tube Amps do not hard-clip even at high volumes and are extremely efficient. Due to this the amp sounds more like double the rated power!.