HiFiMAN RE-400 Waterline in-ear headphones Silver/Black

In-Ear Monitor with Titanium Diaphragm

The HiFiMAN RE-400 Waterline is a high-performance in-ear monitor built for listeners who want accurate sound from a compact form factor. Its 8.5mm titanium diaphragm driver is designed and manufactured in-house, paired with a neodymium magnet structure and OFC copper cabling. The silver and black finish distinguishes this model visually. It targets users seeking a premium wired earbud experience without the bulk of over-ear headphones.

Upgrade from Basic Earbuds

This model replaces standard bundled earbuds or entry-level in-ears that use generic dynamic drivers and thin cables. The jump is worth it when you need a frequency response of 15 to 22 kHz, a sensitivity of 102 dB per milliwatt, and a rated power handling of 10 mW with a 30 mW maximum. The 32 ohm impedance with a 3.2 ohm tolerance ensures broad compatibility with portable sources. The 6.700 metre cord length provides reach for desktop or mobile use.

Check Source Output and Fit Preference

Before ordering, verify that your playback device has a standard headphone connector to match the plug. The earbud coupling style sits in the outer ear rather than sealing deep in the canal, so confirm you prefer that fit over true in-ear tips. The 32 ohm load is easy to drive, but very low-voltage outputs may not reach desired volume. No inline microphone or remote is mentioned in the specifications.