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HIFIMAN EF400 - Balanced Desktop DAC and Amplifier - Open Box FAQs

What types of headphones are compatible with the HiFiMan EF400?

The HiFiMan EF400 is compatible with a wide range of headphones, including both high-sensitivity in-ear monitors (IEMs) and power-demanding over-ear headphones. It offers multiple output options—3.5mm single-ended, 4.4mm balanced, 6.35mm single-ended, and 4-pin XLR balanced—to accommodate various headphone connections. For high-sensitivity IEMs, it's recommended to use the low-gain mode to prevent excessive power output.

Does the HiFiMan EF400 support both NOS (Non-OverSampling) and OS (OverSampling) modes?

Yes, the HiFiMan EF400 supports both NOS and OS modes. Users can switch between these modes to tailor the sound to their preferences. According to HiFiMan, the OS mode typically sounds natural, while the NOS mode offers a balanced and neutral presentation.

Is the HiFiMan EF400 suitable for driving power-hungry headphones?

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