Kramer HDMI 2.1 Cable

C-HMU – HDMI 2.1 Ultra High Speed Cable with Ethernet (8K / 48 Gbps)

Kramer C-HMU is a professional HDMI 2.1 Ultra High Speed cable designed for modern AV installations where maximum bandwidth, stable signal, and reliability are crucial. The cable supports up to 8K@60 Hz (48 Gbps), Dynamic HDR, eARC (Enhanced Audio Return Channel), and advanced audio formats – perfect for home cinema, gaming, conference rooms, and professional AV environments.

With K-Lock™ pull-resistant connectors, short HDMI connector, and small bend radius, the C-HMU is particularly suitable for tight spaces behind TVs, in racks, or media cabinets.

HDMI 2.1 – Future-Proof Video and Audio

The C-HMU is certified Ultra High Speed HDMI and supports:

• 8K@60 Hz and high bandwidth up to 48 Gbps

• Dynamic HDR for better contrast and color depth

• eARC for uncompressed high-resolution audio

• Full compatibility with HDCP 2.2, EDID, CEC, and Ethernet

Supported color spaces include RGB, YCbCr, BT.2020, Adobe sRGB, and xvYCC, among others.

Stable Connection Even in Demanding Installations

The cable is designed for maximum reliability:

• K-Lock™ HDMI connectors with approx. 15 lbs retention force to prevent disconnections

• 24K gold-plated connectors for the best possible signal transmission

• Triple-shielded cable for high interference immunity

• Carefully selected conductor gauge (AWG) depending on length

This ensures a stable signal even at high resolutions and during long-term use.

Multiple Lengths – Choose the Right One for Your Installation

The C-HMU is available in several length variants (same performance, different cable dimensions):

• 0.9 m – C-HMU-3

• 1.8 m – C-HMU-6

• 2.7 m – C-HMU-9

• 3.0 m – C-HMU-10

• 4.6 m – C-HMU-15

Shorter lengths have thinner cables and smaller bend radii, which are ideal behind TVs and in cabinets.

Technical Specifications (Common)

Video & Audio

• Max resolution: 8K@60 Hz

• Bandwidth: 48 Gbps

• HDMI Features: Dynamic HDR, eARC, HDCP 2.2, CEC, Ethernet

• Audio formats: Dolby Digital Plus™, Dolby TrueHD™, DTS-HD Master Audio™, DVD-Audio, SA-CD

Construction

• Connectors: HDMI Type-A male to male, K-Lock™, 24K gold-plated

• Short connector: 3.1 mm

• Conductor material: Copper

• Shielding: Triple

• Jacket: PVC

• Color: Black

Standard & Environment

• Fire safety: CL3

• Environmental requirements: RoHS, REACH

Summary

The Kramer C-HMU is a robust, premium-grade HDMI 2.1 cable for those who want:

• Full support for 8K, HDR, and eARC

• Secure connection without disconnections (K-Lock)

• Reliable performance in both home cinema and professional AV environments

• A cable that works even in tight installations