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  • Orientation Type: Over Ear
  • With Mic: Yes
  • Connector Type: Wired | USB Type C
  • USP: Signature Sennheiser Sound, Removable Cable System, Comfortable Closed-Back Design
  • Warranty: 12 Months Warranty

Specifications

  • Product Category

    • Device Type

    • Headphone

    • Suitable For

    • Travel | Gaming | Entertainment | Office Use

    • Form Factor

    • Over-Ear

  • Manufacturer Details

    • Brand

    • Sennheiser

    • Model Series

    • HD 400U

    • Model Number

    • HD 400U

  • Product Dimensions (Open)

    • Dimensions In CM (WxDxH)

    • 19.50 x 10 x 23.20

    • Product Weight

    • 217 g

    • Dimensions In Inches (WxDxH)

    • 7.67 x 3.93 x 9.13

  • Sound

    • Frequency Response

    • 18 Hz – 20 kHz

    • Additional Sound Features

    • Uncompressed Digital Audio, True Sennheiser Sound, Balanced Tuning with Clear Mids, Detailed Highs & Controlled Bass, Analog Cable Support

    • Sound Configuration

    • Stereo Sound

    • Sensitivity

    • 120 dB SPL at 1 kHz, 1V RMS

    • Impedance

    • 18 Ohm

    • Noise Cancellation Type

    • Passive Noise Cancellation

    • Total Harmonic Distortion

    • <0.5% (1 kHz, 100 dB SPL)

    • Deep Bass

    • Yes

  • Physical Attributes

    • Audio Jack

    • 3.5mm

    • Cable Length

    • 1.4 Meters

    • Device Control Type

    • In-line Controls

    • Foldable Headphones

    • Yes

    • Device Controls

    • Play/Pause Music, Accept/End Phone Calls, Fast-forward/Skip Tracks, Rewind Tracks, Activate Voice Assistant

    • Driver/Diaphragm Features

    • Dynamic

    • Additional Body Features

    • Durable & Reliable, Soft & Replacable Ear Pads, Removable Cable System, Closed-back Over-ear Comfort

  • Functions

    • Compatible Devices

    • Laptops | Tablets | Mobile Phones

    • Compatible OS

    • iOS | Android OS | Windows OS

  • Mic Specifications

    • No. of Microphones

    • 1

    • Microphone Availability

    • Yes

    • Microphone Features

    • Omni-Directional Pick-up Pattern

    • Microphone Placement

    • In-line Mic

    • Microphone Frequency Range

    • 10 Hz - 10 kHz

    • Microphone Sensitivity

    • -44 dBV/Pa

  • Smart Functions

    • Voice Assistance

    • Siri Supported | Google Assistant Supported

  • Network Connectivity

    • Wi-Fi Supported

    • No

    • Bluetooth Supported

    • No

      • Battery Details

        • Charging

          • Fast Charging Capability

          • No

          • Charging Case

                • Materials & Durability

                  • Body Material

                  • Plastic

                • Aesthetics

                  • Brand Color

                  • Black

                  • Color

                  • BLACK

                • In The Box

                  • Documents

                  • 1 x Quick Guide | 1 x Warranty Card

                  • Main product

                  • 1 x Headphone U

                  • Accessories

                  • 1 x USB-C Cable

                  • Package Includes

                  • 1 x Headphones, 1 x USB-C Cable, 1 x Warranty Card, 1 x Quick Guide

                  • Generic Name

                  • Earphone/Headphone

                • Packaged Dimensions

                • After Sales & Services

                  • Warranty on Main Product

                  • 12 Months

                  • Warranty Type

                  • Carry-In

                  • Standard Warranty Includes

                  • Manufacturing Defects

                  • Standard Warranty Excludes

                  • Physical Damage

                  • Installation & Demo

                  • Not Applicable

                  • Warranty on Accessories

                  • 6 Months

                  • Installation & Demo applicable

                  • No

                • Certification

                  • Certifications

                  • ROHS Compliance

                • Company Contact Information

                  • Customer Support Number

                  • 18005727662

                  • Customer Support Email

                  • customersupport@croma.com

                  • Manufacturer/Importer/Marketer Name & Address

                  • Importer Name & Address: Sonova Consumer Hearing India Private Limited 510, 5th Floor, Time Tower, M.G.Road, Sector 28, Gurugram, Haryana - 122002 | Manufacturer Name & Address: Sonova Consumer Hearing GmbH Im Heidkampe 9, 30659 Hannover Germany

                  • Country of Origin

                  • Germany

                  • Country of Brand Origin

                  • Germany

                • Croma Service Promise

                  • Customer Support Email

                  • customersupport@croma.com

                  • Registered Name and Address

                  • Infiniti Retail Ltd. - Unit No. 701 & 702, 7th Floor, Kaledonia, Sahar Road, Andheri (East); Mumbai - 400069. India

                  • Customer Support Number

                  • 1800 572 7662

                  • Customer Care Contact Person

                  • Grievance Officer

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                Overview

                Instant USB-C Plug-and-Play Connection

                The Sennheiser HD 400U provides direct digital audio connectivity across modern personal devices. Featuring a USB-C plug-and-play connection, these wired headphones connect straight to compatible laptops, desktop computers, tablets, and mobile phones without complex configuration steps. Because the unit receives audio signals and electrical power directly through the digital cable interface, operating the device requires no internal batteries or routine recharging routines. Digital signal transmission ensures consistent audio signal transfer across business calls, music listening, and multimedia desktop sessions without wireless latency.

                 

                Signature Acoustic Engineering and Balanced Audio Output

                Equipped with dynamic transducers housed inside a closed acoustic structure, the Sennheiser HD 400U delivers a balanced frequency response ranging from 18 Hz to 20,000 Hz. With a nominal impedance rating of 18 ohms and sound pressure levels reaching 120 dB, the internal drivers function efficiently when connected to standard mobile devices and office computers without requiring external amplification units.

                 

                Closed-Back Over-Ear Design for Passive Noise Isolation

                The physical construction incorporates a closed-back over-ear design engineered to reduce background room noise naturally. Soft, replaceable ear pads enclose the ears to establish effective passive noise isolation during extended listening sessions in busy environments. The lightweight physical frame features a foldable construction that simplifies storage inside carrying bags during daily transit. This physical configuration maintains user comfort across daily office working hours, commuting schedules, and domestic listening routines.

                 

                Removable Cable System with Inline Remote and Microphone

                A removable cable system offers practical flexibility for varied hardware configurations. The supplied 1.4-metre USB-C cable attaches securely to the ear cup via a dedicated twist-to-lock connection mechanism. An inline remote with microphone allows users to manage phone calls, adjust audio playback options, and trigger mobile voice assistants such as Siri, Google Assistant, or Baidu directly. An omni-directional microphone pick-up pattern enables clear voice capture during remote business meetings and phone calls.

                 

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