TEAC AI-503 silver

Integrated Amplifier with Bluetooth Function and Dual Mono USB DAC

The AI-503 is an integrated amp and USB DAC that supports inputs up to 11.2 MHz DSD and 384 kHz/32-bit PCM. The DAC/preamp, which is the heart of the unit, follows the same design concept as our UD-503 and adopts a fully balanced dual mono circuit design. Separate VERITA AK4490 D/A converters - manufactured by Asahi Kasei Microdevices Corporation - are used for the left and right channels. In addition to a USB digital input (for Windows/Mac computers), an optical/coaxial digital input, and an RCA analog input, we have also enabled high-resolution wireless audio listening by including an LDAC-compatible Bluetooth receiver. Moreover, with a combined 3.5 mm digital/stereo optical mini-jack on the front panel, the device supports wired and wireless inputs from DAPs.

The power amplifier uses a Class D power amp (manufactured by ICE power) that ensures high resolution when playing delicate signals as well as high linearity at high volumes. This unit can power both compact bookshelf speakers (for desktop applications) and large floorstanding speakers. The preamp section uses a fully balanced TEAC-QVCS high-precision volume control circuit with a 4-circuit construction. By maintaining detail levels at all resolutions, the AI-503 creates a highly realistic sound stage with a high signal-to-noise ratio and excellent sense of space. By connecting an external power amplifier to the pre-equipped output jacks, you can enhance performance and create an even more powerful audio system. The headphone amp section uses a discrete TEAC-HCLD circuit, with a push-pull arrangement, allowing it to easily drive high-impedance headphones. The two-level high/low gain switch enables optimal volume adjustment for everything from low-impedance in-ear monitors to high-impedance (600 Ω) in-ear headphones. Additionally, the inclusion of a 3.5 mm headphone jack, which supports a separate 4-pole grounding connection, allows for excellent channel separation even when using a balanced-type headphone or earphone.

• Dual 384 kHz/32-bit converter
• IcePower Class D amplification
• Qualcomm APT‑X HD Bluetooth
• Maximum output
  • 60 W + 60 W (10% distortion, 1 kHz, 4 Ω)
  • 30 W + 30 W (10% distortion, 1 kHz, 8 Ω)
• Rated output
  • 43 W + 43 W (1% distortion, 1 kHz, 4 Ω)
  • 22 W + 22 W (1% distortion, 1 kHz, 8 Ω)

Measurements

• Accepted speaker impedance: 4–8 Ω
• Total harmonic distortion: 0.005% or less (1 kHz, 8 Ω, 1 W)
• Signal-to-noise ratio: 100 dB or more
• Frequency response: 10 Hz – 100 kHz (+1/−3 dB)

General

• Power consumption: 38 W
• Standby power consumption: 0.5 W or less (in standby mode)
• External dimensions: 290 × 81.2 × 264 mm
• Weight: 3.7 kg

Included items

• Power cord × 1
• Remote control (RC-1328) × 1
• Remote control batteries (AAA) × 2
• Instruction manual (this document, including warranty) × 1