TEAC AI-503 USB DAC/Integrated Amplifier

code: n/a
From £900.00 (FREE UK Delivery)
Item out of Stock  |  Usually dispatched within 24 hours
Add to Bag
This product has been added to your basket...
  • Continue Shopping
  • Checkout

Integrated amplifier with Bluetooth function and a dual mono USB DAC.

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 TEAC's 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, TEAC 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. The pre-amp 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 very realistic soundstage, along with a high signal-to-noise ratio and excellent sense of space. By connecting an external power amplifier to the fitted pre-out jacks, you can upgrade performance and create an even more capable audio system. The headphone amp section uses a discrete TEAC-HCLD circuit, with a push-pull arrangement, allowing it to drive even high-impedance headphones with ease. The two-stage High/Low gain switch enables optimal volume setting for everything from low-impedance in-ear monitors to high-impedance (600Ω) on-ear headphones. Furthermore, the inclusion of a 3.5mm headphone jack, one that supports a 4-pole separate ground connection, allows excellent channel separation, even when using balanced-type headphones or earphones.

Main features:

  • USB DAC with a dual-mono configuration that supports resolutions up to 11.2MHz DSD and 384kHz/32bit PCM
  • Bluetooth® receiver supports LDACTM/Qualcomm® aptXTM for high quality wireless audio quality
  • Dedicated headphone amp with discrete, push-pull circuit
  • Headphone jack supports 3.5mm 4-pole separate ground connection
  • Combined stereo mini/optical digital jack on front panel, convenient for connecting digital audio players
  • Pre-amp section provides fully balanced transmission and uses TEAC-QVCS high-precision volume control circuit
  • High-output Class-D power amplifier (made by ICEpower a/s)
  • Switchable filter types, including 4 PCM and 2 DSD digital filters
  • Pre-out jacks can be connected to both power amplifiers and active speakers
  • Two pairs of analog RCA inputs, as well as USB, optical and coaxial digital inputs (one each) on back panel
  • Dual analog level meters with adjustable brightness

Technical Specification:

Speaker Outputs:

  • Maximum output: 60W + 60W (10% distortion, 1 kHz, 4 Ω) / 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 Ω)
  • Allowable speaker impedance: 4–8 Ω
  • Total harmonic distortion: 0.005% or less (1 kHz, 8 Ω, 1 W)
  • S/N ratio: 100dB or more (analog input, when 8 Ω load, rated output, A-weighted)
  • Frequency response: 10 Hz–100 kHz +1/–3 dB (8 Ω, 1W, analog input)

PRE OUT Audio Outputs:

  • RCA jacks: 1 pair (L/R)
  • Output impedance: 150 Ω
  • Frequency response: 10 Hz–100 kHz (+1/–3 dB) (analog input, when 200mVrms output)
  • S/N ratio: 103 dB or more (analog input, when 1kHz/2Vrms output, A-weighted)
  • Total harmonic distortion: 0.005% or less (analog input, when 1kHz/2Vrms output, 20kHz LPF)

Headphone Output:

  • 3.5mm 4-pole stereo mini jack: 1
  • Practical maximum output: 280 mW + 280 mW (GAIN set to HIGH, into 32 Ω load, 10%)
  • Compatible impedance range: 16–600 Ω

Analogue Audio Inputs:

  • RCA jacks: 1 pair (L/R) / Input impedance: 30 kΩ / Maximum input: 2 Vrms
  • 3.5mm stereo mini jack: 1 / Input impedance: 22 kΩ / Maximum input: 2 Vrms

Digital Audio Inputs:

  • COAXIAL digital - RCA connector: 1
  • OPTICAL digital - Square (TOSLINK) connector: 1 / Round connector: 1 (–24.0 to –14.5 dBm peak)
  • USB-B port: 1 (USB 2.0 standard)

PCM Data Sampling Frequency:

  • COAXIAL digital: 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz
  • OPTICAL digital: 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz
  • USB: 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz, 352.8 kHz, 384 kHz

Quantization Bit Depth:

  • COAXIAL digital/OPTICAL digital: 16/24-bit
  • USB: 16/24/32-bit

DSD Data Sampling Frequency:

  • COAXIAL digital/OPTICAL digital: 2.8 MHz (supported using 176.4kHz/24-bit DoP transmission)
  • USB: 2.8/5.6/11.2 MHz

Bluetooth Function:

  • Bluetooth version: 4.0
  • Output class: Class 2 (approximate transmission distance 10 m)
  • Supported profiles: A2DP, AVRCP
  • Supported A2DP codecs: SBC, AAC, Qualcomm® aptXTM, LDAC
  • A2DP content protection: SCMS-T
  • Maximum number of stored pairings: 8


  • Power supply: AC 220–240 V (50/60 Hz)
  • Power consumption: 38 W
  • Standby power: 0.5 W or less (in standby mode)
  • External dimensions (W × H × D including protrusions): 290 × 81.2 × 264 (mm) (11 1/2" × 3 1/4" × 10 1/2")
  • Weight: 3.7kg (8 1/4 lb)
  • Operating temperature range: +5ºC to +35ºC
  • Operating humidity range: 5% to 85% (no condensation)
  • Storage temperature range: −20ºC to +55ºC

Included Accessories:

  • Power cord ×1
  • Remote control (RC-1328) × 1
  • Batteries for remote control (AAA) × 2
  • Owner's manual (including warranty) × 1

We endeavour to despatch same day for orders placed up to 2pm on available stock items (items with stock message "Usually dispatched within 24 hours"). Please remember to check with us first for a physical stock check if next day delivery is important to you. Any items with stock message "Usually dispatched within 72 hours" are items that we do not hold in stock but order in from the importer or manufacturer as soon as a customer order is recieved. Occasionally these may be delayed beyond 72 hours due to importer/manufacturer stock levels but we will inform you as soon as we can if this is the case.

UK ORDERS:  We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge.  Non Mainland locations - Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer and are not Free of Charge. Smaller items are delivered using Royal Mail recorded delivery or special delivery. Larger items are delivered using a courier service such as Interlink Express, DPD, UPS or DHL. 

INTERNATIONAL ORDERS: We offer competitive rates which can be confirmed by email. Please just ask – we will need a full delivery address and telephone number. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using DPD, DHL or UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Turntableworld or by the courier with a request for any further information required. Customs duties do not apply for shipments into any EU country (for a full list please refer to the EU Country List). Customs duties can apply for countries outside of the EU. Customers in these countries are responsible for all taxes and duties incurred when the items enter their country.

COLLECT IN STORE OR HOME INSTALL:At the request of the manufacturer some items cannot be supplied by mail order but you can click and buy them and then elect to collect them from our store or arrange a home install (if applicable). Applicable items clearly state that they are Collect in store or home install. Once ordered you will receive a message prompting you to contact us by phone or email to arrange for us to deliver and install or to reserve and collect from our store at your convenience, you will also be advised of the delivery time / stock availability as not all Home install / collect in store items are held in stock. 

Be the first to review TEAC AI-503 USB DAC/Integrated Amplifier. Write a review ›