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TEAC AI-503-A Black Integrated Amplifier w / USB DAC


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Condition: New

Brand-new, unused, unopened and undamaged item in original retail packaging (where applicable).


Limited 2 year warranty.  More info

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Tue 21st September 2021

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The AI-503 is an integrated amp and USB DAC that supports inputs up to 11.2MHz DSD and 384kHz/32-bit PCM. The DAC/preamp, which is the heart of the unit, follows the same design concept of our UD-503 and adopts a dual-mono circuit design that is fully balanced.

Separate VERITA AK4490 D/A converters - made by Asahi Kasei Microdevices Corporation - are used for the left and right channels. In addition to a USB digital input (for Windows/Mac computers), optical/coaxial digital input and RCA analog input, we have also enabled high-resolution wireless audio listening by including a LDAC-compatible Bluetooth® receiver. Furthermore, with a combined 3.5mm optical digital/stereo mini jack on the front panel, the unit supports wired, as well as wireless, input from DAPs.

The power amplifier uses a Class-D power amplifier (made by ICEpower a/s) that guarantees high resolution during the playback of 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.

  • Tick USB DAC With a Dual-Mono Configuration That Supports Resolutions Up To 11.2MHz DSD And
  • Tick 384kHz/32bit PCM
  • Tick Bluetooth Receiver Supports LDACTM/Qualcomm aptXTM For High Quality Wireless Audio Quality
  • Tick High-Output Class-D Power Amplifier
  • Tick Switchable Filter Types, Including 4 PCM and 2 DSD Digital Filters
High Capacity

High Capacity

Efficient toroidal-core power transformers that can supply stable power are used. They are specifically designed to suppress magnetic flux leakage and prevent electromagnetically-induced noise, so can provide current that is always pure and stable.

Dual Mono DAC

Dual Mono DAC

High-performance VERITA AK4490 DACs support 11.2MHz DSD and 384kHz/32-bit PCM. For the DAC chips, the key to high-performance digital audio, we used the highly-regarded VERITA AK4490* DACs, made by Asahi Kasei Microdevices Corporation. Along with native playback of 11.2MHz DSD signals through direct processing, a wide range of high-resolution audio sources (including 384kHz/32-bit PCM digital input) are supported.

Robust Design

Robust Design

All-metal enclosure provides both vibration resistance and a stylish appearance in an A4-sized footprint that can be easily accomodated. Since the enclosure is completely made of metal panelwork, which is resistant to external noise, the infiltration of electromagnetic noise generated by computers and other equipment is well-suppressed. This creates an electrically ‘clean’ internal environment with little noise.

USB Input

USB Input

The USB input supports resolutions up to 11.2MHz DSD and 384kHz/32-bit PCM. “DSD native playback” in which DSD is converted directly to analogue without first being converted to PCM is also supported. TEAC HR Audio Player, a free music playback software specifically written for TEAC products, supports ASIO 2.1 and DoP (DSD over PCM) formats, allowing native playback of 11.2MHz DSD audio sources on Windows as well as Mac computers.

Bluetooth Receiver That Supports LDAC

The onboard Bluetooth receiver supports LDAC and aptXTM as well as AAC and other wireless transmission of high-quality audio. You can easily enjoy your music by wirelessly transmitting audio from your smartphone or tablet.

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.

Speaker Outputs

Maximum Output 60W + 60W (10% Distortion, 1 kHz, 4 Ohms)
30W + 30W (10% distortion, 1 kHz, 8 Ω)
Rated Output 43W + 43W (1% Distortion, 1 kHz, 4 Ω)
22W + 22W (1% Distortion, 1 kHz, 8 Ohms)
Allowable Speaker Impedance 4 - 8 Ohms
Total Harmonic Distortion 0.005% or Less (1 kHz, 8 Ω, 1 W)
S/N Ratio 100 dB or More ( Analogue Input, When 8 Ohm Load, Rated Output, A-Weighted )
Frequency Response 10 Hz–100 kHz +1/–3 dB ( 8 Ohms, 1W, Analogue Input )

Pre Out Audio Outputs

1 x RCA Pair Output Impedance : 150 Ohms
S/N Ratio 103 dB or More ( Analogue Input, When 1kHz/2Vrms output, A-Weighted )
1 x 3.5mm 4-Pole Stereo Mini Jack Compatible Impedance Range : 16–600 Ohms
Practical Maximum Output 280 mW + 280 mW ( GAIN Set to HIGH, Into 32Ω Load, 10% )

Analogue Audio Inputs

1 x RCA Pair Input Impedance : 30k Ohms
Maximum Input : 2 Vrms
1 x 3.5mm Stereo Mini Jack Input Impedance : 22k Ohms
Maximum Input : 2 Vrms

Digital Audio Inputs

Digital Coaxial 1 x RCA Connector
Digital Optical 1 x Square (TOSLINK) Connector
1 x Round Connector
Digital USB 1 x USB-B 2.0 Port
Bluetooth Bluetooth Version 4.0


Power Supply Model for Europe : AC 220–240 V ( 50/60 Hz )
Model For U.S.A./Canada. AC 120 V (60 Hz)
Power Consumption 38 W
Standby Power 0.5 W or Less ( In Standby Mode )
External Dimensions 290mm × 81.2mm × 264mm
Weight 3.7 Kg
Included Accessories 1 x Power Cord
1 Remote Control ( with Batteries )
1 x Owner's Manual

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.

PayPal Credit - Flexible Credit

Buy Now, Pay Later: Get 4 months 0% finance when you spend £99 or more. Look for the PayPal Credit button when making your purchase.

More information on PayPal Credit is available here.

PaybyFinance - Pay Monthly

Pay monthly plans up to 60 months, on loan values between £500 and £25000. Minimum order value of £556.

0% IF6 6 Months
15.9% IB12 12 Months
15.9% IB24 24 Months
15.9% IB36 36 Months
15.9% IB48 48 Months
15.9% IB60 60 Months

Choose your deposit amount

Deposit variable between 10% and 50%, subject to a minimum loan value of £500.


Please note: the above quotation is an indicative cost and actual monthly payments may vary by +/- 2p per month.

For further information please visit the finance page.


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We do not dispatch orders to addresses outside of the United Kingdom.

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