Do You Need a Dongle DAC or Portable Amp for Your Headphones?

I bought a $400 pair of planar magnetic headphones, plugged them into my phone with a $15 USB-C dongle, and was disappointed. Not because the dongle was bad — because I had no idea my headphones were only producing 30% of their potential sound. Here’s what I learned the hard way.

What is a Dongle DAC and When Do You Actually Need One?

A dongle DAC (Digital-to-Analog Converter) is a tiny USB-C or Lightning adapter that converts digital audio signals into analog sound your headphones can play. Most phones no longer have headphone jacks, so these have become essential.

But here’s the hard truth I wish someone told me: most people don’t need a dongle DAC. If you’re listening to Spotify at 160kbps on AirPods or basic earbuds, your phone’s built-in DAC is fine. The upgrade only matters if you own high-impedance headphones (250 ohms or more) or planar magnetic drivers that demand more voltage than your phone can provide.

I tested this myself with my Beyerdynamic DT 990 Pro (250 ohm) — the phone’s headphone jack produced weak, tinny sound. Plug in a $35 AudioQuest DragonFly Cobalt, and suddenly those headphones sound like they’re supposed to. That’s the difference a dongle DAC makes for high-impedance gear.

Portable Amps: The Next Level After Dongle DACs

Portable amps are different from dongle DACs. A dongle handles the digital-to-analog conversion. A portable amp takes that analog signal and amplifies it to drive harder-to-power headphones. Think of it as the difference between a weak flashlight and a high-powered lamp.

If you own anything from the audiophile tier — Hifiman, Audeze, Focal — you’ll want both. The dongle DAC converts the signal, and the portable amp gives it the muscle to drive those demanding drivers. I use the Seymour Audio Soundbase SE ($199) paired with my Schiit Bifrost 2 for desktop, and a mini portable amp for travel.

When a Dongle DAC Alone Is Enough (And When It’s Not)

Here’s my take: stick with a basic dongle DAC if you have in-ear monitors or low-impedance headphones under 50 ohms. The AirPods Pro 2, Sony WF-1000XM5, and most TWS earbuds don’t need anything extra. But if you’re running 250-600 ohm headphones like my Sennheiser HD 660S2, you’re leaving money on the table without proper amplification.

For the rest of us with hybrid setups — earbuds for commuting, over-ear for home — I recommend getting a mid-range dongle DAC like the Apple USB-C Dongle ($9) for casual use and a dedicated portable amp when you’re at home listening critically.

My Setup and What I’d Recommend for Different Budgets

I currently use this configuration: Samsung Galaxy S24 Ultra (3.5mm output) → Apple USB-C dongle for my AirPods Pro 2, then switch to a Seymour Audio Portable Amp for my Sennheiser Momentum 4 Wireless at home. The difference in sound quality between the two setups is night and day, but both are justified by how I use each pair of headphones.

If you’re just getting started, grab a $15-20 dongle DAC like the Sabrent or Apple USB-C adapter. If you’re serious about your headphones, invest in a portable amp in the $100-200 range. Your ears will thank you.

For more on choosing the right headphones for your needs, check out my budget audiophile headphones guide or my headphone fit guide.

Related reading on this site: my 250 ohm impedance breakdown that finally explained why the DT 770 Pro whispered on my phone my balanced cable teardown that stopped me spending $180 on braided wire.