This article covers Monoprice Monoprice 4K High Speed HDMI Cable 40ft.

Overview

The Monoprice 4K High Speed HDMI Cable 40ft is an active long-distance HDMI cable with CL2 in-wall rating, delivering up to 18Gbps bandwidth. Supporting 4K@24Hz, 3D video, Deep Color (up to 48-bit), and Audio Return Channel (ARC), it’s a reliable solution for home theater projectors, conference rooms, and any scenario requiring a clean, long cable run between source and display. Its active design compensates for signal loss over the full 12.2-meter (40-foot) length, ensuring stable 3840×2160 resolution transmission that passive cables often struggle to maintain at this distance. The braided jacket and CL2 certification also make it compliant for in-wall installation under North American building codes.

Connectivity & Compatibility

The cable uses standard HDMI Type A (19-pin) connectors on both ends, compatible with TVs, monitors, projectors, game consoles (PlayStation, Xbox), PCs, and AV receivers. HDMI 2.0 compliant with 18Gbps data rate Supports 3840×2160@24Hz, 2560×1440@60Hz, 1920×1080@60Hz, and 3D formats x.v.Color, Deep Color (up to 48-bit), ARC, and HDMI Ethernet Channel (HEC) CL2 (Class 2) rated for in-wall installation * Braided shielding for noise rejection and physical durability

Product Info

The Monoprice 4K High Speed HDMI Cable 40ft is a mid-range long HDMI cable from U.S.-based Monoprice. Its key differentiator versus budget entries is the active circuitry and CL2 in-wall rating, making it suitable for semi-permanent or professional installations. Release: Continuously available since approximately 2015 Price: Around ¥17,182 on as of June 2026 Warranty: Monoprice Lifetime Warranty (cables only) Accessories: Cable only, no extra adapters * Availability: , Monoprice direct store

Best Use Cases

Home theater with ceiling-mounted projector The 40-foot length easily spans the distance between a projector at the ceiling and the AV rack on the wall. Active signal boosting keeps 4K stable at this length, and CL2 rating allows safe routing inside walls or ceiling cavities. Commercial signage and event installations For digital signage, trade-show booths, and conference-room displays that require long, tidy cable runs, this cable’s active circuitry avoids the flicker and dropouts typical of passive cables beyond 30 feet. The braided jacket withstands repeated coiling and uncoiling during setup. * PC gamer wanting a separated setup If your PC tower lives under the desk or in another room, a 40ft HDMI cable can reach a monitor on your desk without needing an extender. HEC support also lets you combine LAN and video into one cable. Not ideal for: 4K@60Hz or 120Hz gaming, HDR, or 4:4:4 chroma subsampling — those scenarios require an HDMI 2.1 (48Gbps) cable. For short runs under 3 meters, a cheaper passive cable will do.

Things to Consider

Be aware that the maximum resolution is 3840×2160@24Hz only. For 4K@60Hz, HDR, or high-refresh-rate output from modern consoles or PCs, you’ll need an HDMI 2.1 cable. Active HDMI cables have a defined direction (source end versus display end). Check the markings near each connector before plugging — hooking it up backward will result in no video signal. Despite the braided exterior, long cables are sensitive to sharp bends. Avoid kinking or pinching the cable, especially near the connector ends, to prevent damage to the internal active electronics. Monoprice’s Lifetime Warranty is handled directly with the manufacturer (in English). Japanese users may need to pay return shipping if filing a claim, so factor that into your purchase decision.

Product Disclosure (Amazon)

  • Manufacturer: Monoprice
  • Seller: KKストア本店 EC事業部
  • Fulfilled by: KKストア本店 EC事業部
  • ASIN: B015121JYC
  • Note: This article covers a manufacturer-made product based on Amazon listing details.