HDBaseT™ 2.0 4K60 extender with ARC.

The NX2-220 extends HDMI 2.0b signals at full 18 Gbps bandwidth over a single CAT6a/7 cable, supporting 4K@60Hz (4:4:4) up to 40 m and 1080p@60Hz up to 70 m. It is HDCP 2.2 and HDCP 1.x compliant and passes HDR10, HDR10+, and Dolby Vision metadata without alteration — ensuring the display receives the full dynamic range intended by the source regardless of the extension distance.

What distinguishes the NX2-220 from a basic HDMI extender is the depth of its audio architecture. The transmitter provides both a 3.5 mm stereo L/R output and an optical S/PDIF output, with four selectable audio modes accessed via a front-panel button. These modes allow the installer to choose between extracting audio directly from the HDMI source, returning audio from the display via ARC, returning audio from the receiver's optical S/PDIF input, or a combined ARC mode that simultaneously outputs return audio on S/PDIF, L/R, and loops it back through HDMI. This flexibility covers scenarios from simple audio de-embedding to complex setups where a display's built-in tuner or streaming app needs to feed audio back to an amplifier at the source end — without running a separate audio cable.

The full audio format range covers PCM 2.0/5.1/7.1, Dolby Digital, Dolby Digital Plus, Dolby TrueHD, DTS, DTS-HD Master Audio, and DSD over HDMI, with LPCM 2.0, Dolby Digital/Plus, and DTS supported on the optical path. Colour depth support includes 8/10/12-bit at 1080p and 4K30, 8-bit at 4K60 (4:4:4), and 10/12-bit at 4K60 (4:2:0).

Bi-directional IR pass-through enables source control from the display end and display control from the source end simultaneously. Included IR receiver and blaster cables (1.5 m, 20–60 kHz) connect via 3.5 mm jacks on both units. RS-232 pass-through on Phoenix connectors provides a serial control path between transmitter and receiver for integration with control systems or RS-232 equipped displays. CEC pass-through is also supported for basic device control without additional cabling.

Power over Cable means a single 24 V/1 A power supply connected to either the transmitter or receiver powers both units through the CAT cable. This simplifies installation significantly — particularly at the display end where mains power may not be conveniently accessible behind a wall-mounted screen. The included power supply uses a locking DC connector to prevent accidental disconnection.

Both units are housed in compact metal enclosures (165 × 88.3 × 20 mm) with included mounting ears for fixed installation behind displays, inside credenzas, or in rack-adjacent positions. ESD protection meets IEC 61000-4-2 at ±8 kV air-gap and ±4 kV contact discharge. A micro-USB service port on each unit provides firmware update capability for future compatibility updates.

The NX2-220 is suited for conference rooms where a source rack feeds a wall-mounted display with return audio to an amplifier, classrooms with interactive displays requiring IR control pass-through, digital signage with remote source equipment, and any installation where running a single CAT cable replaces multiple HDMI and control cables.