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Kramer

Kramer CP-HM/HM/ETH-50 Plenum Rated High-Speed HDMI Cable

A 50-foot plenum-rated HDMI cable built for safe, high-speed A/V runs in professional installations.

$164.00*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Kramer CP-HM/HM/ETH-50 is a 50-foot high-speed HDMI cable engineered for professional audio-video installations where building codes demand plenum-rated cabling. Its fire-retardant, low-smoke jacket is approved for use in plenum airspaces — the open areas above suspended ceilings and below raised floors that serve as HVAC pathways — where standard PVC-jacketed cables are prohibited. This makes it an essential component for commercial environments such as conference rooms, lecture halls, houses of worship, and retail displays where HDMI runs must pass through regulated spaces.

Beyond its safety compliance, the cable supports high-speed HDMI with Ethernet, combining video, audio, and data transmission into a single run. At 50 feet, it covers the distance typical of projector-to-source or display-to-rack installations without requiring active signal boosters in most standard configurations. Both ends are terminated with full-size HDMI Type A male connectors, ensuring compatibility with the vast majority of professional and consumer AV equipment. Kramer's reputation in the professional integration market backs the build quality, with robust shielding and connector construction designed for set-it-and-forget-it reliability in permanent installations.

Specifications

Cable Type
HDMI (M) to HDMI (M) with Ethernet
Length
50 feet
Rating
Plenum Rated
Speed
High-Speed

Pros & Cons

👍 Pros

  • Plenum-rated jacket meets strict fire safety codes for commercial airspace installations
  • 50-foot length accommodates long runs between source and display without repeaters in most setups
  • Built-in Ethernet channel reduces the need for a separate network cable to compatible devices
  • Kramer's professional-grade build quality ensures reliable long-term signal integrity
  • Standard HDMI-A male connectors on both ends for broad device compatibility

👎 Cons

  • 50-foot fixed length offers no flexibility if a shorter or longer run is needed
  • Thicker plenum-rated jacket is less flexible and harder to route through tight spaces than standard HDMI cables
  • Does not support HDMI 2.1 features like 4K at 120Hz or 8K resolution
  • Higher cost than non-plenum-rated cables of the same length
  • Bulk and stiffness make it impractical for portable or temporary setups

Frequently Asked Questions

Plenum-rated means the cable's jacket is made from fire-retardant, low-smoke materials approved for installation in plenum airspaces — the spaces above drop ceilings and below raised floors used for HVAC airflow — where building codes require stricter fire safety standards.
Yes, it is an HDMI with Ethernet cable, supporting the HDMI Ethernet Channel for data sharing between compatible devices without a separate network cable.
Kramer designs this cable for reliable high-speed transmission at 50 feet. For most setups at this length, it will deliver a clean signal, though very high-resolution or high-refresh-rate sources may benefit from a signal extender.
Yes, its plenum rating exceeds standard in-wall (CL2/CL3) requirements, making it appropriate for both in-wall and plenum airspace installations in commercial and residential buildings.
Both ends feature standard full-size HDMI Type A male connectors.

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