Teac Ud-503 – USB DAC/Headphone Amplifier

Teac Ud-503 – USB DAC/Headphone Amplifier




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Dual-monaural USB DAC that supports 11.2MHz DSD with built-in fully-balanced/parallel-unbalanced headphone amplifier

The UD-503 is a dual-monaural USB DAC and fully-balanced headphone amplifier in a compact body with a footprint the size of a piece of paper. It represents the distillation of TEAC audio design expertise developed for over 60 years with audiophile design concepts.
The same dual-monaural structure, which is an audiophile design concept, as in the UD-501 is used. In addition, two AK4490 DAC chips which are the newest models made by Asahi Kasei Microdevices Corporation, enable native playback of the most advanced 11.2MHz DSD and 384kHz/32-bit PCM formats. Furthermore, analog output circuits could be called the cornerstone for audio quality, so we have now included four TEAC-HCLD circuits, which are current-enhancing output buffer amps. Operation is fully-balanced when using balanced XLR output and parallel-unbalanced when using unbalanced RCA output. We have realized a DAC section with expressiveness that exceeds the expectations of its class. The headphone amp, which shares the amp section with the line amp, has a discrete structure. Two TRS phone jacks are available on the front panel, and they offer powerful driving force when used as a fully-balanced or parallel-unbalanced headphone amplifier. In addition, the TEAC-QVCS high-precision volume control that provides 256 setting steps and the remote control enable use as a high-quality preamp. The UD-503 is the next generation of USB DAC/headphone amplifier that is leading desktop audio to the next level.

 is a high end audio and home cinema specialist retailer based in Pozzuoli (Italy), established in 1990. We are currently considered one of the most remarkable companies in the Italian market.





Main functions

  • Two built-in AK4490 DACs made by Asahi Kasei Microdevices support resolutions up to 11.2MHz DSD and 384kHz/32-bit PCM
  • Dual-monaural structure thoroughly separates independent left and right circuits from the power supply to the output stage
  • Built-in preamp circuits are ideal for setting up systems with power amps and active speakers
  • Analog RCA input pair enables use with analog sources
  • In addition to fully-balanced operation, the headphone amplifier supports parallel-unbalanced and active ground headphone operation
  • Our original TEAC-HCLD output buffer circuit, which is a current-enhancing output buffer circuit, conveys the dynamism of music
  • Capable of upconversion up to 12.2MHz DSD and 384kHz PCM
  • TEAC-QVCS high-precision volume control with a four-circuit structure allows 256 setting steps
  • In addition to high-precision internal clocks, 10MHz external clock input is also supported
  • Full-metal body with three independent pinpoint feet realizes high vibration suppression and stability


Consonance Srl

Ricordo da bambino zia Maria a casa della nonna suonare con il Petrov Pianofortissimo di Carosone, un brano da virtuosi che lei eseguiva con naturalezza. L’idea di riprodurre la musica dal vivo in un luogo protetto come la casa di mia nonna mi ha spinto a fare di questa passione il mio lavoro. A 14 anni andai per la prima volta in un negozio di dischi, chiesi i Police e ascoltai Bring On The Night in un “Pioneer A400”: fu un momento indimenticabile, un rituale di iniziazione…

Da qui è nata la mia passione: all’istituto agrario passavo ore tra i banchi di scuola ad immaginare come potesse suonare quel pezzo strappalacrime di Tracy Chapman, Baby can I hold you, con le casse di ultima generazione Yamaha. L’adolescenza l’ho passata costruendo o riparando amplificatori Marantz che trovavamo a casa di amici e parenti.A un certo punto con mio padre decidemmo di creare Consonance, per coniugare questa passione con il lavoro: e sono passati quasi 30 anni dal fatidico 21 aprile del 1991, quando aprimmo il primo negozio.

Info contatti

Traversa Pisano 5
Pozzuoli (NA)

Telefono: +39 081 5263589

Cellulare: +39 335 628 7060

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