Sennheiser SL HEADMIC 1 -4 BK

Sennheiser SL HEADMIC 1 -4 BK Omnidirectional Headset Microphone (Black)

The Sennheiser SL HEADMIC 1 -4 BK (Article Number: 506905) is a factory-original original equipment manufacturer (OEM) ultra-lightweight condenser headset microphone. It is engineered for high-tier public speaking, corporate presentations, academic lectures, and broadcast environments where the microphone must remain completely discreet on camera or under studio lights.

Integrating Sennheiser’s high-tier MKE 1 omnidirectional subminiature capsule, this premium neckband framework balances outstanding speech clarity with a minimalist footprint. The "-4" model designation indicates that this variant is fitted with a specialized 3-pin special connector (LEMO style), built exclusively to secure into high-end professional wireless transmitter lines.

Key Performance and Acoustic Attributes

• Subminiature MKE 1 Microphone Matrix: Built around a 3.3 mm miniature pre-polarized condenser capsule that reproduces the spoken word with outstanding transparency, balanced high-frequency intelligibility, and a linear 20 Hz to 20,000 Hz frequency tracking scale.

• Featherlight Metal Ergonomics: The neckband and microphone boom are constructed from a robust, flexible metal wire frame. Weighing only 7 grams without the cable, it distributes clamping force evenly to guarantee user comfort during all-day conference sessions.

• Adjustable Modular Architecture: The ultra-thin 1.1 mm microphone boom arm can be adjusted in length or swapped entirely to sit on either the left or right side of the presenter's face depending on visual preference or wardrobe layout.

• Extreme Acoustic Headroom: Engineered to cleanly absorb vocal dynamics up to 143 dB SPL without internal diaphragm clipping, ensuring high-energy corporate keynotes or dramatic theatrical dialogue remain distortion-free.

Technical Specifications Matrix

In the Box: Production Package Inventory

• 1 x SL Headmic 1 Neckworn Framework Microphone (Black)

• 1 x Connection Cable (Fitted with a 3-pin special LEMO connector)

• 1 x MZC 2 High-Frequency Response Cap

• 1 x SL MZW 1 Specialized Foam Windscreen

• 1 x Protective Soft Case (Tailored to cradle the headset and an optional bodypack transmitter)

• 1 x Quick Start Guide & 1 x Safety Instructions

Deployment and Live Fitting Advice

Locking the 3-Pin Connector Interface: The 3-pin specialized plug uses a secure push-pull locking ring mechanism. Align the micro-alignment grooves inside the plug with the chassis jack of your transmitter (such as the SK 6212 or SK 6000) and press straight forward until it clicks into position. When removing the line, pull directly from the knurled metal collar—never yank or pull on the flexible microphone wire itself.

Positioning the Omnidirectional Capsule: Because the omnidirectional polar pattern picks up sound uniformly from all directions, it remains highly forgiving if the user turns their head. For optimized speech capture and low feedback tracking, adjust the telescoping boom so the capsule sits just behind the corner of the mouth. Avoid placing the mic directly in front of the lips to prevent explosive breath pop artifacts. Use the included SL MZW 1 foam windshield if the presentation takes place directly underneath an air conditioning vent or outdoors.