As Amazon Associates, we earn from qualifying purchases. This means we may receive a small commission at no extra cost to you if you click through and make a purchase.
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
You are looking at the hifiman open back planar magnetic headphones vs sundara closed back models. Both use planar magnetic drivers and stealth magnet technology for clear sound. They share a wired connection and over-ear fit. The main difference is the back design. One is open-back for ambient sound. The other is closed-back for isolation. This choice affects how you hear music and how much noise you let in.
Back Design
Open-Back
Closed-Back
Weight
13.8 ounces
15.2 ounces
Ear Cups
Newly designed casing
Beechwood ear cups
Diaphragm
Standard planar layers
NEO supernano Diaphragm
Use
Audiophiles, Studio
Audiophiles, Studio, Mixing
Choose the first if
- You want lighter headphones for long sessions.
- You prefer open sound in a quiet room.
- You need compatibility with low-voltage portable players.
Choose the second if
- You need sound isolation from outside noise.
- You want detailed imaging with a thinner diaphragm.
- You prefer mixing or studio work requiring closed design.
Verdict
Choose the open-back model if you value lower weight and natural sound in a controlled environment. Choose the Sundara if you need isolation and detailed resolution for mixing. Both deliver high-fidelity audio through planar magnetic technology.
HE400SE vs Sundara Key Specs
back design
Edge: Tie
The HE400SE features an open-back design. This allows air to move freely through the ear cups, creating a wider soundstage. It is ideal for critical listening in quiet rooms. The Sundara uses a closed-back design. This seals the ear cups to isolate you from external noise. It prevents sound leakage, making it better for shared spaces. Your choice depends on your listening environment. Open-back offers spatial depth, while closed-back provides isolation.
driver technology
Edge: HIFIMAN Sundara Closed-Back Planar Headphones
Both models use planar magnetic drivers with HIFIMAN’s Stealth Magnet technology. This design reduces wave diffraction and distortion for accurate sound. The Sundara adds the NEO Supernano Diaphragm (NsD). This diaphragm is 80% thinner than standard designs. Thinner diaphragms respond faster and deliver detailed imaging. The HE400SE does not mention this specific diaphragm thickness. Both deliver full-range sonics, but the Sundara’s thinner diaphragm aims for faster transient response.
weight
Edge: HIFIMAN Open-Back Planar Magnetic Headphones
Weight affects long-term comfort during extended sessions. The HE400SE weighs 13.8 ounces. The Sundara weighs 15.2 ounces. The HE400SE is lighter by 1.4 ounces. Both feature lightweight headbands for comfort. The Sundara includes hand-assembled beechwood ear cups, which add to its mass. The HE400SE uses a durable casing for driver protection. If you prioritize minimal weight for hours of use, the HE400SE has a slight advantage.
features
Edge: HIFIMAN Sundara Closed-Back Planar Headphones
The Sundara highlights a detachable dual-sided 3.5mm cable. This allows you to replace the cable if it fails. It also supports different cable upgrades for better performance. The HE400SE includes a dual-sided high-performance 3.5mm cable with a 6.35mm adapter. It does not explicitly state the cable is detachable. Detachable cables extend the lifespan of your headphones. This feature gives the Sundara a practical edge for maintenance and customization.
use
Edge: Tie
Both models target audiophiles and studio use. The Sundara also lists mixing as a use case. Its closed-back design helps in noisy studio environments by isolating sound. The HE400SE is optimized for audiophiles who value accuracy and open sound. Its high sensitivity makes it suitable for low-voltage portable players. The Sundara’s inclusion of mixing suggests a focus on precision in controlled settings. Both serve professional and enthusiast needs effectively.
compatibility
Edge: HIFIMAN Open-Back Planar Magnetic Headphones
Both headphones use a 3.5mm connection. Each package includes a 6.35mm adapter for desktop equipment. The HE400SE notes high sensitivity, making it easy to drive from portable hi-res audio players. This means you can get good volume from smaller devices. The Sundara does not mention sensitivity levels. Both offer mainstream cable connections for wide device compatibility. The HE400SE’s sensitivity claim gives it an edge for portable source pairing.
Which HIFIMAN planar model fits you
Critical listeners in quiet rooms
Our pick: HIFIMAN Open-Back Planar Magnetic Headphones
The open-back design allows air to move freely, creating a wider soundstage ideal for critical listening. This model offers high sensitivity, making it a perfect match for low-voltage sources like portable players. Its lightweight headband ensures comfort during extended sessions without trapping heat.
Studio engineers needing isolation
Our pick: HIFIMAN Sundara Closed-Back Planar Headphones
The closed-back design seals the ear cups, preventing sound leakage and external noise intrusion. This makes it suitable for mixing and studio environments. The detachable cable adds durability and convenience, while the beechwood ear cups provide a stable, comfortable fit for long recording sessions.
Audiophiles prioritizing portability
Our pick: HIFIMAN Open-Back Planar Magnetic Headphones
Weighing only 13.8 ounces, this model is lighter than the alternative. Its high sensitivity works well with portable devices. The acoustically invisible stealth magnets reduce distortion for accurate sound. You get a durable casing and a dual-sided cable with a 6.35mm adapter for wide compatibility.
HIFIMAN Open-Back Planar Magnetic Headphones
Best for: Audiophiles seeking accurate open-back sound
- Connectivity
- Wired, 3.5 mm, 6.35 mm adapter
- Form Factor
- Over-Ear
- Back Design
- Open-Back
- Driver
- Planar Magnetic
- Use
- Audiophiles, Studio
- Ear Style
- Stereo
The HIFIMAN HE400SE uses open-back planar magnetic drivers with stealth magnets to reduce sound wave diffraction. This design lowers distortion for accurate, full-range audio. The headphones weigh 13.8 ounces and feature a lightweight, adjustable headband for comfort during long sessions. High sensitivity allows them to work well with low-voltage portable sources. You get a wired connection with a 3.5mm cable and 6.35mm adapter. This model suits audiophiles seeking detailed sound without the bulk of heavier studio cans.
- Open-back planar magnetic driver design
- Acoustically invisible stealth magnets reduce distortion
- High sensitivity matches low-voltage portable sources
- Lightweight headband ensures comfort for long listening
- Heavier build at 13.8 ounces compared to lighter alternatives
- Larger dimensions with a 12-inch length
- Wired connection limits wireless convenience
- You want detailed, low-distortion sound from an open-back design
- You listen to music for extended periods and need comfort
- You use portable players with low voltage outputs
- You need wireless connectivity for mobile use
- You prefer a lighter, more compact over-ear fit
- You require closed-back isolation for noisy environments
Verdict: HIFIMAN HE400SE Open-Back Planar Headphones deliver precise audio through stealth magnets and high sensitivity. They fit listeners who prioritize sound accuracy and comfort over wireless freedom.
HIFIMAN Sundara Closed-Back Planar Headphones
Best for: critical listening and studio isolation
- Connectivity
- Wired, 3.5mm, 6.35mm
- Form Factor
- Over-Ear
- Back Design
- Closed-Back
- Driver
- Planar Magnetic
- Features
- Detachable Cable
- Use
- Audiophiles, Studio, Mixing
The HIFIMAN Sundara Closed-Back uses Stealth Magnet planar magnetic drivers to reduce sound reflections. It features a detachable dual-sided 3.5mm cable and beechwood ear cups. The over-ear design weighs 15.2 ounces. This wired headphone suits audiophiles and studio mixing. The closed-back build isolates sound, distinguishing it from open-back competitors like the HE400SE.
- Stealth Magnet design reduces reflections
- NEO supernano Diaphragm for fast response
- Detachable dual-sided 3.5mm cable
- Beechwood ear cups for style and sonics
- Closed-back design limits soundstage width
- 15.2 ounces weight is substantial for all-day wear
- Wired connection restricts movement
- You need sound isolation for studio work
- You prefer closed-back planar magnetic drivers
- You want detachable cable maintenance
- You require wireless Bluetooth connectivity
- You prioritize ultra-lightweight portability
- You need an open soundstage for spatial audio
Verdict: HIFIMAN Sundara Closed-Back Planar Headphones deliver detailed planar sound with isolation, making them ideal for critical listening and studio environments where background noise must be blocked.
Specifications side by side
| Spec | HIFIMAN Open-Back Planar Magnetic Headphones | HIFIMAN Sundara Closed-Back Planar Headphones |
|---|---|---|
| Connectivity | Wired, 3.5 mm, 6.35 mm adapter | Wired, 3.5mm, 6.35mm |
| Form Factor | Over-Ear | Over-Ear |
| Back Design | Open-Back | Closed-Back |
| Connection | Wired | Wired |
| Driver | Planar Magnetic | Planar Magnetic |
| Fit | Over-Ear | Over-Ear |
| Features | – | Detachable Cable |
| Use | Audiophiles, Studio | Audiophiles, Studio, Mixing |
| Ear Style | Stereo | – |
| Dimensions | 12 × 10.5 × 7.09 inches | 12.4 × 10 × 7.05 inches |
| Weight | 13.8 ounces | 15.2 ounces |
| Color | Silver,Black | black&orange |
| Model | He400SE | SUNDARA Closed-Back |
| Size | – | adjustable |
Frequently asked questions
Which HIFIMAN planar headphone has a detachable cable?
The Sundara closed-back model includes a detachable cable. This feature allows you to replace the wire if it becomes damaged or worn over time. The open-back HE400SE does not list this attribute in its specifications, so its cable is likely fixed. You should choose the Sundara if you want the flexibility to swap cables.
Are these headphones wireless or Bluetooth enabled?
Neither model supports wireless connectivity. Both the open-back HE400SE and the closed-back Sundara use a wired connection. You must plug them into your audio source using a cable. This design ensures a stable signal without battery concerns, which is typical for audiophile-grade planar magnetic headphones focused on sound accuracy.
Which model is lighter and more portable?
The open-back HE400SE is lighter at 13.8 ounces. The Sundara closed-back headphones weigh 15.2 ounces. The difference is small, but the HE400SE is slightly more comfortable for long sessions if weight is a priority. Both models are over-ear designs that wrap around your head for secure fit during use.
Which headphones are better for studio mixing?
The Sundara closed-back headphones are better for studio mixing. Their closed-back design provides isolation, blocking background noise so you can focus on your audio. The HE400SE open-back design allows sound to leak out and in, which is less ideal for critical mixing environments where privacy and noise control are essential.
Do these headphones have a wide soundstage?
The open-back HE400SE offers a wider soundstage. Its open-back design allows air to move freely through the ear cups, creating a more spacious audio image. The Sundara closed-back model seals the ear cups, which focuses the sound inward. You will perceive a broader stage with the HE400SE during critical listening.
What colors are available for these models?
The HE400SE comes in silver and black finishes. The Sundara closed-back headphones are available in a black and orange color scheme. These options allow you to choose a style that matches your personal preference or workspace aesthetic. Both models maintain a professional look suitable for audiophile use.
Which model is best for low-voltage portable players?
The open-back HE400SE is ideal for low-voltage sources like portable players. It features high sensitivity, which means it can produce loud, clear sound even with limited power. The Sundara does not list high sensitivity as a key attribute. You should choose the HE400SE if you plan to drive these headphones with smaller devices.