Hybrid amplication: The Monoprice tube amplifier utilizing two 6N1 and two 6P1 tubes for the preamplifier stage, and a robust 25-watt class AB amplifier, for smooth, warm tube sound and enough power to drive your speakers. Wireless Bluetooth connectivity: Connect your Bluetooth enabled device from distances up to 32 feet (10 meters) away and easily stream your favorite music tracks. Featuring wired RCA, wireless Bluetooth, digital optical and coaxial, and USB connections. Achieves a level of versatility and functionality that is unsurpassed.