The FiiO KA2 is a 12.3g USB DAC/amp dongle with two Cirrus Logic CS43131 chips and a single 4.4mm balanced output rated at 153mW into 32Ω, sold in USB-C and Lightning versions. It suits listeners with 4.4mm-terminated earphones or headphones who want PCM up to 32-bit/384kHz and DSD256 from a phone or computer.
Who the FiiO KA2 is for
4.4mm balanced cables: Its only headphone jack is a 4.4mm balanced output rated at 153mW into 32Ω and 54mW into 300Ω, for earphones and headphones from 16 to 300Ω.
Lightning iPhones and iPads: The Lightning version plugs straight into Lightning iPhones and iPads running iOS 10.0.2 or later.
Android phones and computers: The USB-C version connects directly to Android phones and tablets, runs driver-free on macOS and uses FiiO's USB audio driver on Windows; each version includes a USB-A adapter.
Hi-res files: It decodes PCM up to 32-bit/384kHz and DSD64/128/256, and its ring light glows blue up to 48kHz, yellow above 48kHz and green for DSD.
Skip it if: you need a 3.5mm jack, in-line remote or call support, or app control from an iPhone: the KA2 has no buttons, and FiiO says the Lightning version cannot be controlled from the iOS FiiO Control app.
FiiO KA2 key specs
DAC: 2 × Cirrus Logic CS43131
Output: 4.4mm balanced only (no 3.5mm jack)
Output power: 153mW at 32Ω, 112mW at 16Ω, 54mW at 300Ω (THD+N under 1%)
SNR and THD+N: At least 125dB at 32Ω and 131dB at 600Ω (A-weighted); THD+N under 0.0005% at 32Ω
Formats: PCM up to 32-bit/384kHz; DSD64/128/256
Headphone impedance: 16–300Ω; output impedance under 0.5Ω
Versions: USB-C or Lightning, on an attached 70mm cable
App and filters: 5 digital filters, set in FiiO Control on Android (USB-C version)
Size and weight: About 40 × 15 × 12mm; about 12.3g
In the box: KA2, user manual, plus a USB-A to USB-C adapter (USB-C version) or USB-A to Lightning adapter (Lightning version)
Genuine FiiO stock. Free shipping on every order, 45-day returns.
FiiO KA2 vs similar options
vs FiiO KA13: Adds a 3.5mm jack with coaxial out and a Desktop Mode rated at 550mW + 550mW into 32Ω balanced; pick the KA2 for a 12.3g stick with its USB-C or Lightning cable built in.
vs FiiO Snowsky TINY A: Adds 10-band PEQ, in-line remote and mic support and USB-C charging pass-through, with a 3.5mm jack; pick the KA2 for a 4.4mm balanced output rated at 153mW into 32Ω.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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