The xDuoo MU-603 Bluetooth DAC/Tube Preamplifier Is Now On Apos Audio

Bridging old and new school

As audiophiles, we constantly feel a tension between our desire for innovation and nostalgia. We get excited about lossless Bluetooth audio one day and old-school tube amps the next. It seems that every time we fall in love with the future, we become enamored again with the past. A new product usually appeases one of those two desires, nostalgia or innovation. The xDuoo MU-603 Bluetooth DAC/Tube Preamplifier, however, appeases both.

The MU-603 acts as a Bluetooth 5.1 receiver for your amp or speakers, eliminating the need for a desktop DAC. If you’re the sort of person who can’t imagine living without the convenience of Bluetooth or the warmth of tube amplification, you’re going to love this thing. With a Bluetooth 5.1 receiver chip and a 12AU7 tube, the MU-603 offers the best of both digital and analog worlds.

Product highlights

  • Bluetooth 5.1
  • 12AU7 tube
  • Preamplifier
  • ESS ES9018K2M DAC chip
  • Aluminum chassis
  • Gold-plated RCA ports

Head on over to the xDuoo MU-603 product page, and if you need more information please contact our dedicated Support Team via live chat online or email us at

As with all purchases, when you buy from us you get the Apos Promise for Free Priority Shipping, an Extended 2-Year Warranty, a 45-Day Return Policy, and our 30-Day Lowest Price Match.