Sennheiser Headset Cable X3K1, Copper Cable for Broadcast Boomsets, 2m,XLR-3 Connector, 6.3mm Jack Plug
SKU: 21593656487

Sennheiser Headset Cable X3K1, Copper Cable for Broadcast Boomsets, 2m,XLR-3 Connector, 6.3mm Jack Plug

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Description

Sennheiser Headset Cable X3K1, Copper Cable for Broadcast Boomsets, 2m,XLR-3 Connector, 6.3mm Jack PlugSennheiser HEADSET CABLE X3K1 (Cable II X3K1) Professional Broadcast Headset Cable The Sennheiser Headset Cable X3K1 (Article Number: 700427, Legacy: 505782 508546) is a premium, heavy duty replacement master connection cable engineered exclusively for Sennheiser's professional broadcast boomsets and monitoring headsets. Spanning exactly 2 meters (6. 6 feet) in length, this dual shielded copper cable acts as the primary hardware interface between an

Sennheiser HEADSET CABLE X3K1 (Cable II-X3K1) Professional Broadcast Headset Cable

The Sennheiser Headset Cable X3K1 (Article Number: 700427, Legacy: 505782 / 508546) is a premium, heavy-duty replacement master connection cable engineered exclusively for Sennheiser's professional broadcast boomsets and monitoring headsets. Spanning exactly 2 meters (6.6 feet) in length, this dual-shielded copper cable acts as the primary hardware interface between an announcer's headset and an electronic news gathering (ENG) field mixer, production truck terminal, or master control console.

The "X3K1" designation outlines its exact termination configuration: the shared single-sided headset connector runs down a straight line and splits cleanly at the tail end into a standard 3-pin XLR-Male connector for the microphone circuit, alongside a 6.3 mm (1/4") TRS jack plug for stereo headphone monitoring.

Key Structural and Engineering Attributes

  • Aramid-Fiber Reinforced Core: Braided internally with heavy-duty Aramid (Kevlar) reinforcement strands. This structural core significantly increases the cable's tensile strength, preventing inner copper lines from snapping or stretching when subjected to sudden tugs on a chaotic sideline or live stage set.

  • Integrated Anti-Microphonic Coiled Segment: Features a short, precision-engineered coiled element located immediately below the proprietary headset plug interface. This acts as a mechanical shock buffer, intercepting clothing friction, physical handling vibrations, and structure-borne noise before they can travel up the jacket and introduce low-end rumble to the audio feed.

  • Highly Flexible Soft Shielding Layout: Outer-jacket wrapped in a specialized, highly tactile polymer matrix. This design keeps the twin-parallel cable assembly completely flexible and resistant to tangling or looping, even when deployed under extreme temperatures in cold field-broadcast booths.

  • Gold-Plated Contact Interface pins: Both the 3-pin XLR-Male mic barrel and the 1/4" phone plug are treated with heavy gold electroplating. This maximizes signal conductivity, lowers contact resistance, and provides complete protection against atmospheric corrosion and oxidization over years of field abuse.

Technical Specifications Matrix

Feature Parameter Hardware Specification Profile
Model Reference Name Headset Cable X3K1 (CABLE II-X3K1)
Official Article Number 700427 (Current) / 508546 / 505782
Global Trade Product Code (UPC) 615104246300
Primary Cable Composition High-purity multi-strand copper with internal Aramid reinforcement
Total Physical Cable Length 2.0 Meters (6.6 Feet)
Headset-Side Connection Sennheiser Modular Multi-Pin Matrix Terminal (with locking screw mechanism)
Microphone Signal Termination 1 x 3-Pin XLR-Male Plug (Balanced line configuration)
Headphone Signal Termination 1 x 6.3 mm (1/4") TRS Stereo Jack Plug
Jacket Compound Build Non-reflective Matte Black Elastic Polymer
Net Structural Weight Approx. 106 grams (3.73 oz)

Master Headset Compatibility Profile

The X3K1 modular terminal architecture is engineered to attach flush onto the single-sided connection points of the following Sennheiser professional broadcast lines:

  • HMD/HME 26 Series: HMD 26-II-600, HMD 26-II-100, HME 26-II

  • HMD/HME 27 Series: HMD 27 PRO, HME 27 PRO

  • HMD 300 PRO Series: HMD 300 PRO, HMD 300 X3K1, HMD 301 PRO

  • (Note: Not compatible with legacy HD 25 series variants that use alternative pinned layout configurations).

In the Box: Component Inventory

  • 1 x Sennheiser Headset Cable X3K1 (2m Cable Terminated to XLR-3 / 1/4" Jack)

  • 1 x Replacement Miniature Mechanical Mounting Screw

Installation and Field Management Advice

Securing the Headset Anchor Screw: When mounting the X3K1 cable terminal into your compatible headset cup assembly (such as an HMD 26-II or HMD 300 PRO), align the multi-pin array carefully and push it firmly into the receiving slot. Once seated flush, use a small precision screwdriver to lock the included miniature anchor screw into place. Do not over-torque this screw to avoid cracking the plastic headset chassis—tighten it just until it sits hand-tight to keep the cable from tearing loose during intense field movement.

Dynamic Microphone vs. Active Phantom Power Safety: If you are running an HMD 300 PRO or an HMD 26-II headset utilizing this cable, keep in mind that these boomsets feature a high-performance dynamic microphone capsule ($40\text{ Hz}$ to $18,000\text{ Hz}$, hypercardioid/supercardioid). Dynamic elements do not require power. While standard professional audio consoles isolate the XLR lines safely, some older field-recording hubs or intercom boxes with faulty grounding loops can introduce audio artifacts or mild signal clipping if 48V phantom power is left active on that channel. For the cleanest, lowest-noise signal path, manually deactivate the 48V phantom power switch on your mixer's incoming headset microphone channel strip.

Shipping Notes
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Exchange/Return Notes
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SKU: 21593656487

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Juango
Los Angeles, US
★★★★★ 5
A Durable and Convenient Protection Solution
Color: Green Orange
One of the most impressive attributes of these cases is their lightweight yet durable construction. The material feels robust and dependable, shielding my device from scratches, minor impacts, and everyday wear and tear. Despite this durability, the cases remain slim and non-bulky, preserving the device's original profile—a feature I deeply appreciate for maintaining portability and elegance. Another commendable aspect is the precise fit of the cases. Each case snugly wraps around the device, ensuring a secure grip and seamless alignment with buttons, ports, and camera cutouts. This level of precision adds to the ease of use and demonstrates a high attention to detail in the manufacturing process. Additionally, having two cases in one pack offers excellent value. It allows you to switch between them as needed or have a backup readily available. This small yet thoughtful feature adds a layer of convenience that sets this product apart from other single-case offerings.
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Reviewed in the United States on March 9, 2025
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Foothill Woman
Whiting, US
★★★★★ 5
Fits great
Color: Green
After my grandson keep bee lining for the remote, dropped it, which made a teeny chip in it-I decided to try a cover! This is really nice. It fits great. It has a nice grippy feel to it and now it's protected. We bought the lime green one, so now we can find it a lot easier as well as having it looking pretty sleek. It a great cover.
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Reviewed in the United States on October 19, 2025
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Tina
Alexandria, US
★★★★★ 5
Much better fitting
Color: White
Had to buy 2 of these cases because the first one was so well done. I bought another brand and it was such a loose fit. These are awesome!
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Reviewed in the United States on May 17, 2026
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Carrie Wheat
Whiting, US
★★★★★ 5
As advertised
Color: Green Orange
Did exactly what they needed. Made the remote slightly larger so it is easier to use and less slippery.
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Reviewed in the United States on May 31, 2026
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Woodlandsman
Omaha, US
★★★★★ 4
Pretty good...
Color: Red
Red color is kind of an orange-red. Hm... Came with some kind of dust on it. Once cleaned off it's not as slippery, yet still slips on just fine. Protects the remote - and your hands from the remote's hard edges. The raised bumps on the back make it easier to pickup - without digging your fingernails into cushions or carpets as you "scoop."
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Reviewed in the United States on January 31, 2026

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