FiiO KA11 Review: The Number That Disqualifies It

The FiiO KA11 is a USB-C dongle that turns a laptop or phone with no headphone socket into one with a good headphone socket. The reason it is worth naming over a generic USB headphone DAC has nothing to do with how it sounds, which we have not heard. It is that FiiO publishes output power at three loads instead of one, and the third is the figure that tells a large group of buyers not to buy it.

What this rests on: FiiO's published parameter table, cross-checked against a full retailer specification listing on 16 September 2026. Nothing here was measured or listened to. See how we test.

Published specifications

DAC

Cirrus Logic CS43131

DSD

DSD256

PCM

384 kHz / 32-bit

THD+N

< 0.0006% at 32 ohm; < 0.00038% at 300 ohm

Weight

8.5 g

Amplifier

SGM8262

Connector

USB-C to 3.5 mm

Dimensions

44.5 x 9.7 x 10.5 mm

Cable length

65.5 mm

Signal-to-noise

>= 125 dB at 32 ohm, A-weighted

Output impedance

< 0.7 ohm at 32 ohm

Output power, 16 ohm

L+R >= 245 mW + 245 mW

Output power, 32 ohm

L+R >= 200 mW + 200 mW

Output power, 300 ohm

L+R >= 22 mW + 22 mW

The problem it addresses

Two real ones, and neither is "my audio is not good enough".

The first is a missing jack. Phones and thin laptops deleted the headphone socket, and a wired pair still needs somewhere to go. The second is a noisy output — hiss on a quiet passage, or a whine that tracks your mouse, which is a ground loop or interference rather than weakness.

Notice what is not on that list: wanting things to sound better in the abstract. That is the reason most dongles get bought and the reason most disappoint.

What it does well

It publishes the number that says no. FiiO states at least 245 mW per channel into 16 ohm, 200 mW into 32 ohm, and 22 mW into 300 ohm. Most makers of small USB audio devices quote the first figure and stop, because 245 mW reads as enormous. The same device delivers under a tenth of that into a high-impedance load, and FiiO prints it.

The output impedance is genuinely low. Under 0.7 ohm at 32 ohm. For a multi-driver IEM this matters more than raw power, because a high source impedance does not just reduce volume — it bends the frequency response, and the headphone stops sounding like itself.

It is 8.5 grams. Small enough that the question of whether to carry it never arises.

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Ugly score 2

A small dark rectangle on a short cable. It is the least ugly thing this site has reviewed, and it is not trying to be anything else.

Where it stops being the right tool

22 mW into 300 ohm is the whole of it. If you own 250 or 300 ohm studio headphones, this is the manufacturer telling you, in its own specification table, that the device is not for you. A bus-powered dongle has a fixed voltage supply, and driving a high-impedance load needs voltage swing it does not have. The answer there is mains power and a desktop amplifier, and no dongle of any brand escapes this.

But do not read impedance as the whole answer either, because sensitivity is the number that actually decides whether you are short of power. A high-impedance headphone can be efficient and a low-impedance one can be power-hungry. The 300 ohm figure above is a ceiling on what the device can deliver, not a verdict on your specific headphones — check their sensitivity against it rather than assuming.

There is no volume control on the device. You are using the host's steps, and some Android builds give you coarse ones, so the useful range can land between two of them.

The cable is fixed and 65.5 mm long. That is the normal failure mode of this whole category: the joint flexes in a pocket until it does not work, and there is no replaceable part.

Who should buy it, and who should not

Buy it if you have efficient headphones or IEMs, no headphone socket or a noisy one, and you want the problem to go away in something that weighs eight grams.

Skip it if your headphones are high-impedance, or if your onboard output is working fine and the hope is that a dongle will make good headphones better. Test what you already have first — that is free and it settles the question more often than not.

Would we buy it again?

Yes, for the right headphones — and the reason is the specification table rather than the sound. A maker that publishes output power at three loads, including the one that loses it a sale, has told you something you can check your own headphones against. In a category where most devices quote the single most flattering figure they own, that is the most useful thing a manufacturer can do.