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At just 215 mm wide, the TEAC AI-303 audio amplifier houses a compact and powerful amplifier module, a Bluetooth® receiver with DAC®, Qualcomm® aptX™ HD and a USB audio input for playback of Hi-Res sound sources such as DSD256 and PCM 384 /32 from PC/laptop, iPhone, Android phones and tablets, thanks to the USB-C port. The HDMI ARC/eARC interface allows you to enjoy high-quality TV sound with your favorite speakers, while a pair of LINE inputs match your existing hi-fi system and the 4-pin headphone output with ground-isolated circuitry creates high-end headphones. Connecting from TV with a Single HDMI Cable The only connection between the AI-303 and a TV is an HDMI cable. With support for ARC/eARC and HDMI CEC, the AI-303's volume control and power on/off can be controlled via the TV's remote control while receiving PCM 192/24 Hi-Res Audio if the TV supports this resolution. Thanks to its small footprint, the AI-303 can be installed in a TV cabinet. * Please set the digital output to "PCM" in the TV's output settings. Supports Hi-Res audio formats DSD512 and PCM 384/32 To maximize the sound quality of the digital source in studio master quality, the D/A converter of the AI-303 has two types of digital filters and a x2Fs, x4Fs and x8Fs up-conversion processing to track your preferred sound. Large selection of digital inputs, HDMI, USB-C, coaxial and optical. The connections to the digital sources are up to date. The AI-303 features an HDMI port for TV, a USB-C port for PC/laptop and a coaxial/optical port for traditional digital music players, allowing the potential of any digital source to be realized with the powerful D/A Converter is maximized. Built-in Bluetooth® receiver with support for LDAC® and Qualcomm® aptX™ HD The Bluetooth® receiver is used for easy wireless connection to a smartphone and supports standard Bluetooth® codecs such as Qualcomm® aptX™, AAC and SBC, among other standard Bluetooth® codecs also high-resolution wireless codecs such as LDAC®, LHDC and Qualcomm® aptX™ HD. The front panel LEDs indicate which codec is enabled when the connection is established. USB-C for versatile USB connection with PC, smartphone and tablet The AI-303 also supports a variety of digital devices such as smartphones/tablets and portable digital audio players that support USB Audio 2.0 via a powered USB-C port that enables automatic device detection when the device is equipped with a USB-C port is. Most Android devices and newer iPad Air/iPad Pro equipped with a USB-C port can be connected with a single USB-C cable without additional devices. An additional Apple USB adapter is required to connect to an iPhone. When connecting to an Android device, "OTG Connection" or "USB Debug" must be enabled in the developer options menu. Two pairs of audio inputs for more flexibility Two pairs of LINE inputs even fit your existing audio system, including CD players and analog turntables. Analog turntables must be equipped with a built-in phono amplifier. Powerful Ncore® power amplifier from Hypex The compact AI-303 houses a highly energy-efficient and powerful Ncore® power amplifier from Hypex, which has been adopted from the upper-class model and delivers a clear and crisp sound with great musicality. 4-pin headphone output with separated ground The headphone amplifier circuit is designed so that the ground of the left and right channels from the preamp to the 4-pin headphone jack is separated. By separating the two grounds, channel separation is significantly improved and a clear soundstage is achieved. The grounded connection is possible for headphones with a 4-pin plug. * Headphones with a traditional 3-pin plug are also compatible. * 3 pin assignment of the 4-pin socket: Tip: L+, Ring: R+, Ring: L-, Sleeve: R- Coupling Capacitor Less Circuit Headphone Amplifier The headphone amplifier uses the Coupling Capacitor Less Circuit (CCLC) design, which eliminates the negative effects of Eliminates capacitors and provides a high-dimensional headphone listening environment with sufficient low frequency range and good response, while traditional headphone amplifier designs that use output stage coupling (or DC signal removal) inevitably have an impact on the sound due to capacitors, such as: B. Sound changes, phase delays and level drops at low frequencies. More natural Headphone listening with Crossfeed The Crossfeed function provides a natural feeling of sound source distribution when listening to headphones, emphasizing the presence of the middle sound source to improve the lack of mid-range sound and clarify the range of the human voice such as singing, narration and dialogue. The crossfeed effect can be adjusted using the CROSSFEED control on the front. Full MQA Decoding The AI-303 supports full MQA decoding to enjoy studio master quality sound from Allen digital inputs USB-C, HDMI, coaxial and optical inputs in MQA streaming and MQA CD from CD player via a digital connection. Various DAC modes with SoC The AI-303 is equipped with a dedicated digital processing SoC, which performs various digital processes, including MQA decoding. For studio master quality sound, the digital filters required for analog conversion are also processed in the SoC instead of in the D/A converter. In addition to an FIR filter with a short delay and slow roll-off characteristics, an RDOT filter with natural timbre and sound field reproducibility is available for the digital filter, which is based on the technology of analog completion using fluency theory. Combined with upconversion, subtle differences in sound nuance are realized depending on the filter type. Additionally, if the RDOT filter is selected with the upconverter turned off, the D/A converter operates as a NOS (Non Over Sampling) D/A converter. In NOS mode, the pre- and post-echo caused by the impulse response are suppressed and fluctuations in the direction of the time axis are eliminated, enabling faithful analog conversion of the input waveform. This enables high fidelity analog conversion to the input waveform. High-quality analog volume with conductor attenuator Unlike traditional volume circuits, the AI-303's front volume circuit is designed not to pass the music signal directly. By reading the value of the volume control, the circuit reproduces the value using an ohmic attenuator on the board, thereby transmitting the music signal to the amplifier via the shortest path and maintaining the purity of the signal. The system achieves low distortion and an even at low volume high signal-to-noise ratio, so that the original, clear sound of the sound source is reproduced without loss of quality even at low volumes. Last but not least, the level difference between the left and right channels (gain error) and the crosstalk between the two channels are minimized. Asynchronous mode to eliminate jitter in USB transmission When used as a USB DAC, the AI-303 operates in asynchronous mode, where the input signal is controlled by the built-in clock. So the connection with the PC/laptop and the AI-303 becomes a purer digital signal transmission without USB transmission jitter. "Bulk Pet" digital audio transmission When a large amount of digital data from high-resolution sound sources is transmitted via a USB cable, the traditional transmission method causes a large uneven processing load on both the sending PC and the receiving USB DAC, resulting in problems such as sound dropouts can lead. However, "Bulk Pet" achieves stable data transmission by averaging the processing load on both sides to transmit a certain amount of data evenly. Since the sound quality also changes with the load status of the PC, you can choose your preferred sound quality from four preset transmission modes. Stress-free three-point support feet TEAC's unique "Stress-less Foot" three-point support foot is used to provide a stable installation without even the slightest deformation of the floor surface affecting stability. Unlike traditional feet, the stress-free foot is not directly connected to the chassis, allowing it to swing freely for a more natural sound. The base made of milled steel is not permanently mounted, but is attached hanging to the floor. This allows for a more natural and richer sound with a sense of sound source development similar to that of a traditional pinpoint spike foot. Bluetooth® multi-point connection for two The built-in Bluetooth® receiver establishes connections with two different devices at the same time. If you e.g. For example, if you're playing songs from a smartphone, the AI-303 can switch to another device just like selecting the input source, without the hassle of reconnecting steps. * Simultaneous playback is not supported. Subwoofer Preout A subwoofer preout ensures versatility and future system expansions and makes the AI-303 the heart of your home theater system. Full metal housing design The entire housing is made of aluminum/steel panels that are resistant to incoming antenna noise, thereby suppressing the ingress of electromagnetic noise emitted by PCs and other devices. 1A clean, noise-free internal environment is achieved even in harsh audio equipment environments. Additionally, the 8mm thick aluminum plates that wrap the metal casing on both sides prevent twisting and distortion, ensuring a strong and stable construction. Features at a glance Connect from TV with a single HDMI cable Supports Hi-Res audio formats DSD512 and PCM 384/32 Wide range of digital inputs, HDMI, USB-C, coaxial and optical USB-C for a versatile USB connection with PC, smartphone and tablet Integrated Bluetooth® receiver with support for LDAC and Qualcomm® aptX™ HD USB-C for a versatile USB connection with PC, smartphone and tablet Two pairs of audio inputs for more flexibility Powerful Ncore® power amplifier from Hypex 4 -pin headphone output with ground-isolated coupling capacitorless headphone amplifier More natural headphone sound with crossfeed Full MQA decoding Various DAC modes with SoC High-quality analog volume with ladder-type attenuator Asynchronous mode to avoid jitter in USB transmission "Bulk Pet" digital audio transmission Voltage-free three-pin Point feet Bluetooth® multipoint connection for two people Subwoofer pre-output Full metal housing design Accessories included Power cord Remote control (RC-1337) AAAA batteries × 2 User manual PRODUCT ATTRIBUTES EAN:4907034223879 Manufacturer number:AI-303-B Product weight:3.0 kilograms AUDIO -INPUTS Optical/Toslink:1 RCA:2 Input Level & Impedance RCA:10kΩ USB-C:1 Wireless:Bluetooth HDMI eArc:1 GAIN Rated Power (4Ω):50 + 50W THD at Rated Output Power (4Ω):0.03% Rated Power (8Ω) :25+25W THD at Rated Output Power (8Ω):0.03% S/N Ratio:100dB Speaker Impedance:4-8Ω Frequency Response:2-70000Hz A/B Output:No Channels:2 AUDIO OUTPUTS 3.5mm Jack: 1 Power & Impedance 3.5 mm jack:220mW + 220mW (32Ω 1kHz THD 1% JEITA) Subwoofer pre-output:1 AUDIO CODECS & FORMATS Bluetooth Codecs:AAC aptX aptX HD LDAC LHDC SBC Bluetooth Version:4.2 Max. Bluetooth Pairings:8 POWER SUPPLY Energy consumption:63W DIMENSIONS AND WEIGHT Product height:6.1cm Product width:21.5cm Product length:25.7cm Product weight:2.3kg Packaging height:16cm Packaging width:33.7cm Packaging length:39.3cm CONTROL METHODS Control:On device remote control

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