Monoprice Pure Tube Stereo Amplifier with Bluetooth, Line and Phono Inputs, and Qualcomm aptX Audio Add a subwoofer by connecting to the RCA preamp outputs for even more room shaking sound. The Monoprice™ Pure Tube Amplifier utilizes four EL84 tubes for the power output stage and three 6N3 tubes for the preamplifier stage to deliver that rich, full‑bodied tube sound.
30 Day Money Back GuaranteeMonoprice™ stands behind every product we sell with a 30 day money back guarantee! Featuring wired RCA, wireless Bluetooth®, digital optical and coaxial, and USB connections, this tube amplifier achieves a level of versatility and functionality that is unsurpassed. Monoprice 25 Watt Stereo Hybrid Tube Amplifier with Bluetooth, Optical, Coaxial, and USB Inputs, and Subwoofer Out.