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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SKU: 21593656487

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Rebecca
Charlottesville, US
★★★★★ 5
Pretty initial necklace
Color: A, Color: A
This is a cute necklace that I ordered for my daughter. This necklace is nice because it's decent quality but I wouldn't be devastated if it broke or got lost. The initial is nicely made and the chain is delicate. It's the perfect size for my 7 year old and I think my 11 year old would also like it. When I ordered it, it was $15 but now there is a coupon to make it $12 which is a great value. I would buy it for myself if it was silver. It comes in a nice box that makes it great for gifting.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2026
K
Kayla
Fort Morgan, US
★★★★★ 4
Great for daughter or friend!
Color: E, Color: E
This is absolutely perfect for a daughter for Valentine’s Day or a gift just to give. The initial is in a gold with a gold chain and a precious pink heart. Easy to use gold clasp to put it on or off. The chain seems pretty regular like most chains, but seems durable enough to wear everyday. It hasn’t tarnished or turned any necks green so it’s skin safe I would say. Wouldn’t recommend showering with it, but it has stayed gold with no tarnish. It is simple and cute for a friend, daughter, even a mom.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 7, 2026
W
What_Jenna_Reads
Lexington, US
★★★★★ 5
Great for my 8 year old daughter. Dainty and elegant
Color: K, Color: K
This necklace is perfect for my 8 year old daughter. She loves dressing up her clothes with fun necklaces and this one is so elegant and pretty. The chain is very thin so be mindful of that. It could definitely easily break if not taken care of. I do like that it has an adjustable clasp so I can shorten it to where she likes it. The chain is actually a good length so there is room to grow. It is plated so definitely not recommended to wear in water of any kind as it will eventually turn. For the price it’s a good little necklace for younger girls and having their initial on it will be something special for them. The box it comes in is sweet and has a really motivational saying in it.
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Reviewed in the United States on February 5, 2026
M
Maegan Murphy
Cuba, US
★★★★★ 5
Must have
This initial necklace is adorable. The gold tone is pretty and shiny without looking cheap, and the pink heart adds the perfect little pop of color. It feels lightweight but well made, and the clasp is easy to use while still feeling secure. I bought it for my daughter and it’s the perfect everyday necklace cute, simple, and special without being over the top. It’s held up well so far with no discoloration, and it looks great layered or worn alone. Such a great little personalized piece.
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Reviewed in the United States on February 5, 2026
J
JZB
Cuba, US
★★★★★ 5
Beautiful necklace!
I got this beautiful necklace with my daughter’s initial and I was pleasantly surprised when it arrived. It is a 18K gold plated chain and pendant, it looks high quality, and it is very light. My toddler loves the little pink heart, it’s quite the dainty detail! It makes for a beautiful present for your daughter, niece, friend, or loved one. The price is amazing, too! Go grab one or 5!
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Reviewed in the United States on February 5, 2026

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