HiFiMAN HE400se – Open-Back Planar Magnetic Headphones

The HiFiMAN HE400se are open-back planar magnetic headphones designed for audiophiles seeking detailed, natural sound at an accessible level. With a wide frequency response, low impedance, and lightweight build, they deliver clarity and spaciousness ideal for both home listening and critical monitoring.

Key Features

• Planar magnetic drivers: Deliver accurate, distortion-free sound with excellent transient response
• Open-back design: Provides a wide, immersive soundstage with natural imaging
• Comfortable build: Lightweight 390 g design with soft ear pads for long listening sessions
• Low impedance: 25 Ω rating makes them easy to drive with portable players, amps, or desktop setups
• Detachable cable: 1.5 m headphone cable with 3.5 mm plug for flexible use

Customer Benefits

The HE400se offers planar magnetic performance in an affordable package, making it an excellent entry point into high-end headphones. Audiophiles benefit from natural sound reproduction, while casual listeners enjoy comfort and easy compatibility with various devices.

Quick Specs

• Type: Open-back planar magnetic headphones
• Frequency Response: 20 Hz – 20 kHz
• Impedance: 25 Ω
• Efficiency: 91 dB
• Weight: 390 g
• Cable: 1.5 m (3.5 mm plug), detachable

What’s in the Box

• HiFiMAN HE400se headphones
• 1.5 m headphone cable (3.5 mm plug)
• ¼” (6.35 mm) adapter
• Ear pads (pre-installed)

Use Cases / Ideal For

Perfect for audiophiles, home listeners, and music enthusiasts seeking accurate sound reproduction. Ideal for critical listening, desktop setups, or casual enjoyment of high-quality audio.

Pros & Cons

✅ Pros:

• Affordable entry into planar magnetic headphones
• Lightweight and comfortable for long sessions
• Natural, detailed sound with wide soundstage
• Low impedance makes them easy to drive

⚠️ Cons:

• Open-back design leaks sound (not ideal for portable use or shared spaces)
• Requires amplification for best performance

The HiFiMAN HE400se combines planar magnetic technology, open-back spaciousness, and lightweight comfort into a budget-friendly package—making it a top choice for those entering the world of high-fidelity headphones.