Colin FosterBy Colin Foster

Updated November 2026

An objective 2 amp DAC is a compact desktop unit that converts digital audio from your computer into an analog signal and drives your headphones. This guide explains what the design does, how to connect it correctly, and how to tell whether its output suits your headphone impedance. Follow the steps below and you should get clean, stable sound at a volume you can control.

What the Objective 2 Amp DAC Does

A DAC (digital-to-analog converter) handles the conversion from digital files to an analog waveform, while the amp section supplies enough current to move a headphone driver. Many built-in laptop and motherboard outputs combine weak amplification with noisy electronics, which is why a dedicated unit often sounds fuller and quieter in the background. The objective 2 amp DAC is aimed at people who want that separation on a desk without a large rack of gear.

Shopping for one? See our guide: 10 Best DAC and Amp Combo Units for Headphones in 2026.

How to Set Up the Objective 2 Amp DAC

  1. Place the unit on a flat, stable surface away from power bricks and Wi-Fi routers to limit interference.
  2. Connect the USB cable from the unit to your computer, preferably directly to a rear port rather than a hub.
  3. Set the computer’s default playback device to the DAC’s name so audio bypasses the internal sound chip.
  4. Turn the unit’s gain setting to low before plugging in headphones, then raise it gradually.
  5. Connect headphones to the front output and play a familiar track at moderate volume to check for hiss or distortion.

Matching the Output to Your Headphones

Headphone impedance, usually listed in ohms, determines how much power a pair needs. Low-impedance headphones, roughly 32 ohms or less, typically work well with the low gain setting. Higher-impedance models often need the high gain position to reach comfortable listening levels. Check the manufacturer’s specification sheet for your headphones, then match the gain setting to that number rather than guessing by feel.

Headphone Impedance Suggested Gain Setting
Up to about 32 ohms Low
About 32 to 150 ohms Medium, adjust by ear
Above about 150 ohms High

Checking for Noise and Stable Operation

Once the unit is running, play near-silent passages and listen for a faint hiss or a buzzing hum. Hiss that changes with volume usually points to a gain setting that is too high for your headphones. Hum that stops when you unplug the USB cable often points to a ground loop, which a different outlet or a powered USB hub may fix. If the sound drops out, try a different USB port and confirm the playback device is still selected in your operating system’s sound settings. For persistent issues, a qualified audio technician or the manufacturer’s support team is the right resource.

Common Mistakes to Avoid

  • Leaving gain on high with sensitive, low-impedance headphones, which causes hiss and fast volume creep.
  • Routing the connection through a cheap USB hub that adds electrical noise.
  • Forgetting to switch the computer’s output device, so the internal sound chip still plays audio.
  • Judging sound quality at a volume you cannot comfortably maintain for long sessions.
  • A short, shielded USB cable helps keep the connection tidy and reduces the chance of interference on the desk. View on Amazon
  • A powered USB hub is useful if your computer has few rear ports and you need a stable connection for the unit. View on Amazon

FAQ

Does the objective 2 amp DAC work with any headphones?

It works with most standard headphones, but low-impedance pairs need the low gain setting to avoid hiss. Very high-impedance models may need the high setting to reach adequate loudness.

Do I need special drivers to use it?

Most current operating systems recognize USB audio devices without extra software. Check the manufacturer’s page for any driver or firmware notes specific to your computer.

Why is the sound quieter than my laptop’s built-in output?

The gain setting may be on low, or the computer’s system volume may be reduced. Raise the gain one step at a time while keeping the system volume near maximum for the cleanest signal.

Conclusion

The objective 2 amp DAC can clean up your headphone sound when it is set up with the right gain and a stable USB connection. Match the gain to your headphones’ impedance, check for hiss and hum, and avoid the common setup errors above. With those steps done, you should have a quieter, fuller listening setup at your desk.

Ready to choose one?

Colin Foster

About Colin Foster

Colin Foster is part of our editorial team and reviews and edits our headphone comfort & accessories + gaming headsets guides, checking product details against manufacturer specifications and owner feedback.