This desktop audio amplifier accommodates a compact amplifier module with Bluetooth® receiver and USB audio input to playback Hi-Res sound source.

Only 215mm in width, ideal for high quality sound playback on TVs and notebook PCs

Built-in Bluetooth® receiver supporting LDAC®, and Qualcomm® aptX™ HD
The Bluetooth® receiver is employed for easy wireless connection with a smartphone, supporting high-resolution wireless codecs including LDAC®, LHDC, and Qualcomm® aptX™ HD, in addition to other standard Bluetooth® codecs such as Qualcomm® aptX™, AAC, and SBC. The LEDs on the front panel indicate which codec is engaged when connection is established.

High performance Ncore® power amplifier from Hypex
The compact AI-303 accommodates a high energy efficient and high performance Ncore® power amplifier designed by Hypex, borrowed from upper model, delivering clear and crisp sound with rich musicality.

Coupling Capacitor Less Circuit headphone amplifier
The headphone amplifier employs the Coupling Capacitor Less Circuit (CCLC) design, which eliminates these negative effects caused by capacitors and provides a high-dimensional headphone listening environment with sufficient low-frequency range and good response, while conventional headphone amplifier design that employs output stage coupling (or removal of DC signal) inevitably affects the sound due to capacitors, such as sound changes, phase delays, and low-frequency level drops

More natural headphone listening with Crossfeed
The Crossfeed function provides natural sense of sound source deployment on Headphone listening, while emphasizing presence of the center source to improve lack of center sound and clarifies human voice range such vocal, narration and dialogues. The Crossfeed effect is adjustable with the CROSSFEED knob on the front panel.

Amplifier section

• Rated output – 25W + 25W (LINE IN, 1kHz, 8Ω, THD 0.03%, JEITA ) / 50W + 50W (LINE IN, 1kHz, 4Ω, THD 0.03%, JEITA )

Digital audio inputs

COAXIAL

• Connector – RCA × 1
• LPCM – 32k / 44.1k / 48k / 88.2k / 96k / 176.4k / 192kHz, 16 / 24bit
• DSD – 2.8MHz (in 176.4kHz/24bit DoP format)

OPTICAL

• Connector – TOS-link × 1
• LPCM – 32k / 44.1k / 48k / 88.2k / 96k / 176.4k / 192kHz, 16 / 24bit
• DSD – 2.8MHz (in 176.4kHz/24bit DoP format)

USB

• Connector – USB Type-C × 1 (USB2.0 complied)
• LPCM – 44.1k / 48k / 88.2k / 96k / 176.4k / 192k / 352.8k / 384kHz, 16 / 24 / 32bit
• DSD – 2.8M / 5.6M / 11.2MHz

HDMI

• Connector – HDMI Type-A × 1
• Supported formats – ARC/eARC 192kHz, 24bit (PCM)

Analog audio inputs

• Version – 4.2
• Class – Class2 (range: approx. 10m / 33ft.)
• Supported profile – A2DP, AVRCP
• Supported codec – LDAC, LHDC, Qualcomm® aptX™ HD audio, Qualcomm® aptX™ audio, AAC, SBC
• A2DP contents protection – SCMS-T
• Number of paring memory – Max. 8 dvices
• Multi-point connection – Max. 2 dvices

Speaker output

• Connectors – Screw type × 1 pair (compatible with Banana plug)
• Compatible speaker impedance – 4Ω to 8Ω