TEAC UD-503 Dual Monaural USB DAC/Headphone Amplifier - Premium Hi-Fi Audio Converter

Experience unparalleled audio fidelity with the TEAC UD-503 Dual Monaural USB DAC/Headphone Amplifier, a discontinued yet highly sought-after high-end audio component designed for audiophiles and music enthusiasts. This premium USB DAC transforms digital signals from your computer or digital player into analog audio with exceptional clarity and detail, supporting high-resolution formats up to 384kHz/32-bit PCM and 11.2MHz DSD. Featuring dual-monaural circuitry for separate left and right channels, the UD-503 delivers balanced, noise-free performance ideal for headphone listening and system integration.

Crafted by TEAC, a leader in professional audio equipment, the UD-503 boasts a robust aluminum chassis that minimizes vibration and interference, ensuring pure sound reproduction. With versatile connectivity including USB, coaxial, and optical inputs, plus balanced XLR and RCA outputs, it's compatible with a wide range of setups. Though discontinued, the TEAC UD-503 remains a collector's favorite for its superior headphone amplification, capable of driving high-impedance headphones with precision. Elevate your listening experience with this iconic dual-monaural DAC amplifier, perfect for home studios, hi-fi systems, and portable digital audio sources.

Key Features

• Dual Monaural Design: Separate circuitry for left and right channels eliminates crosstalk and enhances stereo imaging for immersive sound.
• High-Resolution Audio Support: Handles PCM up to 384kHz/32-bit and DSD up to 11.2MHz (DXD 384kHz) via USB for studio-quality playback.
• Advanced USB Implementation: TEAC's custom USB audio driver supports asynchronous transfer mode for jitter-free digital-to-analog conversion.
• Dual AK4490 DAC Chips: High-performance AKM Velvet Sound converters per channel for ultra-low distortion and dynamic range exceeding 115dB.
• Powerful Headphone Amplifier: Dedicated amp section with balanced and unbalanced outputs, supporting headphones from 16 to 600 ohms.
• Versatile Connectivity: Multiple inputs (USB-B, coaxial, optical) and outputs (XLR balanced, RCA unbalanced, headphone jacks) for flexible integration.
• Isolated Power Supply: Dual toroidal transformers and extensive shielding reduce noise for cleaner audio output.
• Upgradable Firmware: Supports TEAC's proprietary updates for ongoing performance improvements (via USB).
• Premium Build Quality: All-metal chassis with vibration-dampening feet and gold-plated connectors for durability and optimal signal integrity.
• Remote Control Included: Full-function remote for convenient volume, input selection, and filter adjustments from afar.

Specifications

• Audio Formats Supported:
  • PCM: Up to 384kHz/32-bit (USB), 192kHz/24-bit (Coaxial/Optical)
  • DSD: Up to 11.2MHz (USB native), 5.6MHz (DoP via Coaxial/Optical)
  • DXD: 384kHz/32-bit (USB)
• DAC Configuration: Dual AK4490EQ per channel (4 total)
• Digital Inputs:
  • USB-B: Asynchronous, 24-bit/192kHz max (with driver)
  • Coaxial: 24-bit/192kHz
  • Optical: 24-bit/192kHz
• Analog Outputs:
  • Balanced: XLR (2.0Vrms)
  • Unbalanced: RCA (1.0Vrms)
• Headphone Outputs:
  • 6.3mm Stereo Jack: 500mW + 500mW (into 32 ohms)
  • Balanced 4.4mm Pentaconn: 700mW + 700mW (into 32 ohms)
• Frequency Response: 10Hz to 80kHz (+1/-3dB)
• Total Harmonic Distortion: 0.0004% or less
• Signal-to-Noise Ratio: 115dB or higher
• Power Supply: AC 120V/230V/240V, 50/60Hz (internal dual toroidal transformers)
• Dimensions (W x H x D): 290 x 84.5 x 248.5 mm (11.4 x 3.3 x 9.8 inches)
• Weight: 4.9 kg (10.8 lbs)
• Operating Temperature: 5°C to 35°C
• Finish: Black aluminum
• Accessories: RC-0015 remote control, RCA cables, USB cable, power cord, Owner's manual

Package Contents

• TEAC UD-503 Dual Monaural USB DAC/Headphone Amplifier
• RC-0015 Remote Control
• USB Cable (Type A to B)
• Power Cord
• Owner's Manual
• RCA Audio Cables (for testing)