DAC vs Amp: What Matters More for Sound Quality

By Marcus Chen · June 1, 2026

The Great Debate

In the audiophile community, debates about digital-to-analog converters versus amplifiers have raged for decades. Some argue that the DAC is the most critical link in the chain because it determines how accurately the digital signal is converted to analog. Others contend that the amplifier has a greater audible impact because it must drive the headphones with sufficient current and control.

We set out to answer this question empirically by testing six DAC and amplifier combinations with three different reference headphones, measuring both objective performance and conducting blind listening evaluations.

Test Setup

We used a consistent signal chain: identical digital sources feeding each DAC via USB, with outputs connected to each amplifier via balanced cables where supported. Headphones included the Sennheiser HD 600 (300 ohms), Hifiman Sundara (planar magnetic, 37 ohms), and Meze 99 Classics (32 ohms) to represent different impedance and sensitivity profiles.

DAC Comparison Results

Across all three headphones, the measured differences between DACs were extremely small. Our Audio Precision analyzer showed total harmonic distortion plus noise ranging from 0.0003 percent on the RME ADI-2 to 0.002 percent on the budget Topping D10s. These are all well below the threshold of human audibility, which research places at approximately 0.1 percent THD.

Amplifier Comparison Results

The amplifiers showed much wider variation in measurable performance, particularly with demanding headphones. The Sennheiser HD 600 at 300 ohms revealed significant differences in output impedance, damping factor, and maximum clean output power. The Schiit Magni produced visible clipping at volumes above 85dB SPL with the HD 600, while the Benchmark HPA4 maintained clean output well beyond 110dB SPL.

Blind Listening Results

In our blind listening tests with 12 participants, amplifier swaps were correctly identified at a rate of 72 percent, well above the 33 percent chance rate for a three-way comparison. DAC swaps were correctly identified at only 38 percent, barely above chance. The most commonly noted difference was in bass control and dynamics, both of which are directly related to amplifier performance.

Recommendations

If you have a limited budget, prioritize the amplifier. A $200 DAC paired with a $400 amplifier will almost always sound better than a $400 DAC paired with a $200 amplifier, especially with harder-to-drive headphones. Once you have a competent amplifier, DAC differences become vanishingly small at modern price points.

Conclusion

Modern DACs are remarkably competent devices, and even budget options measure well enough to be inaudible in practice. Amplifiers, however, show meaningful performance variation that affects real-world listening. Invest in a good amplifier first and a competent but not necessarily expensive DAC second.