If you buy a high-end headphone like the Sennheiser HD 650 or a HiFiMAN Sundara and plug it into your computer, it might sound “weak.” The bass will be muddy, the soundstage will be cramped, and the volume will be underwhelming. You need an amplifier.
Do I Need One?
Not all headphones need an amplifier. If you have low-impedance, high-sensitivity headphones (like most IEMs), a small dongle DAC/Amp is enough. If you have high-impedance headphones (like the Sennheiser HD 600), you need an amplifier that can provide enough voltage.
Key Factors
- Impedance (Ohms): Tells you how much voltage you need. High ohms need more voltage.
- Sensitivity (dB/mW): Tells you how much power you need to reach a certain volume. Low sensitivity needs more power.
- Features: Do you need Bluetooth? Balanced outputs? DSP?
Our Picks
For most people, a desktop stack like the FiiO K7 or Topping DX3 Pro+ is the “set it and forget it” solution. If you want something portable, look at the iFi Gryphon.
Final Verdict
Don’t overthink the “numbers.” Get a well-rated, clean-measuring amplifier from a reputable brand like FiiO, Topping, or iFi, and you’ll be set for years.
For more, read Best Desktop DAC/Amp Combos 2026.