An Airport For Your Aux Cables: The xDuoo MT-603 Multichoice Pre-Amp Now Available on Apos Audio

If you’re swimming in aux cables from all of your analog devices, you’re going to love the xDuoo MT-603. It’s like an airport for your aux. Connect all of your analog sources for fast and convenient switching, while enjoying the benefits of tube amplification. 

Product highlights

  • 4 RCA inputs

  • Sweet tube sound

  • TONELUCK analog switches

  • Professional capacitors

  • Gold-plated RCA ports

  • Aluminum alloy shell


Tube pre-amplification


3 RCA inputs > 1 RCA out


Sandblasted aluminum alloy shell

Head on over to the xDuoo MT-603 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.