Description
For more than 80 years, Sennheiser has stood for true sound. The HD 400U carries this legacy forward, delivering the unmistakable Signature Sennheiser Sound through a modern USB-C connection. No pairing. No batteries. Just pure, uncompressed audio, instantly.
- Signature Sennheiser Sound
- USB-C digital plug-and-play connection
- Removable cable system
- Inline remote & microphone
- Closed-back over-ear comfort
Sound that Stays True: Hear Music the Way the Artist Intended
At the heart of the HD 400U is the Signature Sennheiser Sound. Carefully tuned to be balanced and natural, it reveals emotional detail that standard headphones often miss. Clear and expressive mids, shimmering highs, and deep yet controlled bass combine to create a listening experience that feels authentic, immersive, and true to the music.
Instant Digital Connection: Plug and Play Simplicity that Lets the Music Speak
The USB C digital connection delivers uncompressed audio directly from your device to your ears. With no pairing rituals or batteries to manage, the HD 400U offers a reliable, plug-and-play experience across compatible smartphones, tablets, laptops, and computers. Just connect and press play.
Instant Digital Connection: Comfortable Design, Ideal to Carry Around
Lightweight and secure, the HD 400U is built for hours of comfortable listening. The closed-back over-ear design provides passive noise isolation while allowing the sound to breathe. Soft, replaceable ear pads and a foldable construction make it ideal for work, travel, and everyday use.
Instant Digital Connection: Flexible and Functional
The removable cable system gives you the freedom to adapt to different devices. Use the included USB C cable with inline remote and microphone for calls and playback, or switch to an optional analog cable when needed.
True Sennheiser Sound
Balanced tuning with clear mids, detailed highs, and controlled bass.
Pure Digital Audio
USB C connection delivers stable, uncompressed sound without pairing or charging.
Flexible Listening
Removable cable system lets you use the included USB-C cable or switch to an optional analog cable.
Stay Connected
Inline remote and microphone for easy call handling and music control.
Comfortable Closed-back Design
Lightweight, foldable construction with passive noise isolation and soft, replaceable ear pads
Built to Last
Durable materials engineered for everyday reliability
What's in the Box
- One USBC cable with inline remote and microphone
- A quick guide to get you started
Product Features
- Transducer principle: Dynamic
- USB C
- Microphone - pick-up pattern: Omni-directional
- Signature Sennheiser sound
- Removable cable system
- Inline remote & microphone
- Cable length: 1.4 m
- Headphones - Sound pressure level (SPL): 120 dB SPL @ 1 kHz, 1V RMS
- Headphones - Total harmonic distortion (THD): <0.5% (1 kHz, 100 dB SPL)
- Microphone - Frequency response: 100 – 10,000 Hz
- Microphone - Sound pressure level (SPL): -44 dbV/Pa
Specifications
-
Brand
- Sennheiser
Warranty
-
Warranty
- 24 months
Dimensions
-
Weight
- 0.217 kg
General
-
Product Type
- Wired Headphones
-
Product Category
- TV & Audio
Headphone Features
-
Headphone features Fit
- Over-Ear
-
Cord Length
- 1 m
-
Wired or Wireless
- Wired
-
Compatibility
- All Smartphones
- Laptops
- Tablets
-
Features
- Noise Isolating
- Wired Headphones
Sound Features
-
Sound Pressure Level
- 120 dB
-
Frequency Response
- 18 - 20
- 000 Hz
-
Impedance
- 18 Ω
Battery & Power
-
Power Source
- Battery
Headphone Filter Features
-
Headphone Fit
- Over-Ear
-
Headphone Features
- Noise Isolating
-
Microphone
- Yes
-
Connection Type
- USB-C
Over Ear Heaphones Filter Spec
-
Brand Name
- Sennheiser
-
Headphone Features
- Noise Isolating
Delivery & Returns
Delivery
We offer a comprehensive nationwide (excluding Republic of Ireland) delivery service; we aim to deliver all orders as quickly as possible.
| Item Type | Delivered In | Delivered By |
|---|---|---|
| Small Items | 3 - 5 Working days | DPD |
| Large Electrical Items | 3 - 5 Working days | Independent transport company |
| Furniture & Bedding | 3 - 5 Working days | Independent transport company |
| Clearance Items | 5 - 7 Working days | Independent transport company |
| Harvey Norman Customer Direct | Please refer to each individual product description page for accurate lead times. | |
Please note: Delivery times for rural areas may vary depending on routes and availability. If you have ordered any products that involve a lead time, are customised, or made to measure, we will contact you to discuss delivery. For more information regarding delivery and associated costs, please click here.
Free Click & Collect In Store
Can’t wait for delivery or don’t want to pay additional delivery charges? It’s incredibly simple to collect your online order in store and get your hands on your product quickly and easily. Simply select the Click & Collect option and head to your nearest Harvey Norman store to collect your order.
During checkout, select “Click & Collect” and select your preferred store.
After your order is placed, you will receive an order acknowledgement email with your order number.
Once the store has confirmed your order and reserved the stock, you will receive an email to inform you that your order is “Ready for collection”. If you want to use "Contactless Click & Collect" select this option on this email.
Bring your order number to the store you selected for Click & Collect, along with photo ID and the credit card you used to make the order.
Speak to one of our staff and your order should be processed in minutes.
If availing of Contactless Click & Collect, please click the link in your email “ready to pick up” to let the store know you are on your way. When you have parked in the designated parking bay, open your email, and choose the “I’m here” option and a member of staff will bring your purchase out to your car.
Easy returns
Store Purchases: For all items purchased from a physical store, please return to your local Harvey Norman Store. Please see Terms & Conditions here.
Online Purchases: For all items purchased via our Online Store (website), please contact our Online Customer Service Team at [email protected] where a dedicated Customer Service Agent will guide you through the process.
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Delivery
Collect from
Click & Collect
Collect in store
Nearest store with stock
Nearest store with stock
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