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USB-C / LIGHTNING DONGLE · CS43131 × 2

FiiO KA2

A USB-C / Lightning dongle with two CS43131 DAC chips, a 4.4 mm balanced output. About 12.3 g.

Manufacturer page

POWER AT 32 Ω≥153mW4.4 mm balanced
OUTPUT IMPEDANCENot statedNo data from the manufacturer
SNR≥125dBas FiiO states it
PRICE$34.59Lowest price at eBay
OUTPUTS4.4 mm balanced
DAC CHIPCS43131 × 2
PARAMETRIC EQNoFiiO offers no adjustable EQ
CONTOURNot supported

Numbers are the manufacturer's stated figures unless marked as measured; sources linked below.

Outputs and power

4.4 mm balanced
153mWat 32 Ω per channel
KA series comparison: ≥153 mW, THD+N <1%
Output impedance -
SNR≥125 dB

Not stated: gain, supply voltage, distortion, crosstalk.

Is it enough for your headphones?

FiiO rates the KA2 at ≥153 mW into 32 Ω. Below is how much of that is left to spare for each kind of headphones when you listen loud, with peaks at 110 dB. A figure marked est. is worked out from that rating.

Sensitive IEMsMulti-driver sets that hiss on strong sources
needs 0.6 mWest. 77 mW at 16 Ω+21 dB
Most IEMsTypical in-ears, 16 to 50 Ω
needs 3.2 mW≥153 mW at 32 Ω+17 dB
Easy-to-drive headphonesClosed and portable, 32 Ω
needs 16 mW≥153 mW at 32 Ω+10 dB
Hard-to-drive headphones300 Ω, HD 600 class, hungry for voltage
needs 20 mWest. 16 mW at 300 Ωunder 1 dB short
Most planarsPlanar magnetic, low impedance, need current
needs 50 mW≥153 mW at 32 Ω+5 dB
Demanding planarsThe hardest loads, desktop territory
needs 251 mWest. 82 mW at 60 Ω5 dB short

Where to buy

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eBay · retail price, checked 16 Oct 2026$34.59

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The device

From FiiO's spec sheet unless marked
InputUSB-C cable, Lightning cable
FormatsPCM up to 32-bit / 384 kHz, DSD64; DSD128; DSD256
DAC chipCS43131 × 2
AppFiiO Control APPproduct page
Parametric EQNo adjustable EQ. Not supported in Contour.product page
SizeAbout 40 × 15 × 12 mm
WeightAbout 12.3 g

How it stacks up against the competition

Power at 32 Ω · price in US dollars
100 mW200 mW10 mW$20$30$50scale breaks hereMost IEMs need 3.2 mW+17 dB to spareFiiO KA11: 200 mW at 32 Ω, $29.99KA11Questyle M12i: 21 mW at 32 Ω, $49TANCHJIM SPACE LITE: 98 mW at 32 Ω, $39.99SPACE LITESnowsky Melody: 250 mW at 32 Ω, $39.99MelodyHidizs S3 PRO: 55 mW at 32 Ω, $39.99Hidizs S9: 125 mW at 32 Ω, $49.99S9Hidizs SD2: 70 mW at 32 Ω, $35.99Hidizs XO: 195 mW at 32 Ω, $40.99XOTempoTec Sonata BHD Pro: 280 mW at 32 Ω, $59.90TempoTec Sonata HD III: 70 mW at 32 Ω, $45.90HiBy FC3: 70 mW at 32 Ω, $39HiBy FC4: 340 mW at 32 Ω, $49iFi GO link: 70 mW at 32 Ω, $59Snowsky Tiny A: 34 mW at 32 Ω, $19.99TRN Black Pearl: 320 mW at 32 Ω, $31.44 (lowest offer on /deals today)JCALLY AP6: 440 mW at 32 Ω, $39.99JCALLY AP7: 70 mW at 32 Ω, ~$45.73JCALLY JM7MAX: 118 mW at 32 Ω, $19.99JCALLY JM20: 31.3 mW at 32 Ω, ~$31.64JCALLY JM20 PRO: 31.3 mW at 32 Ω, ~$35.46JCALLY JM20MAX: 195 mW at 32 Ω, $29.99JM20MAXJCALLY JM30: 31.3 mW at 32 Ω, ~$27JCALLY JM30L: 31.3 mW at 32 Ω, $26.99JCALLY JM30PRO: 31.3 mW at 32 Ω, ~$46.49JCALLY JM45: 20 mW at 32 Ω, ~$26.50JCALLY JM45L: 20 mW at 32 Ω, ~$28.45JCALLY JM80E: 45 mW at 32 Ω, $39JCALLY JM98MAX: 195 mW at 32 Ω, $34.99JCALLY SP30: 31.3 mW at 32 Ω, ~$54.61NiceHCK NK1 Ultra: 122 mW at 32 Ω, $29.99NK1 UltraFiiO JIEZI B: 34 mW at 32 Ω, $22.99FiiO KA2100 mW200 mW50 mW$20$30$50scale breaks hereMost IEMs need 3.2 mW+17 dB to spareFiiO KA11: 200 mW at 32 Ω, $29.99KA11Questyle M12i: 21 mW at 32 Ω, $49TANCHJIM SPACE LITE: 98 mW at 32 Ω, $39.99SPACE LITESnowsky Melody: 250 mW at 32 Ω, $39.99MelodyHidizs S3 PRO: 55 mW at 32 Ω, $39.99Hidizs S9: 125 mW at 32 Ω, $49.99S9Hidizs SD2: 70 mW at 32 Ω, $35.99Hidizs XO: 195 mW at 32 Ω, $40.99XOTempoTec Sonata BHD Pro: 280 mW at 32 Ω, $59.90TempoTec Sonata HD III: 70 mW at 32 Ω, $45.90HiBy FC3: 70 mW at 32 Ω, $39HiBy FC4: 340 mW at 32 Ω, $49iFi GO link: 70 mW at 32 Ω, $59Snowsky Tiny A: 34 mW at 32 Ω, $19.99TRN Black Pearl: 320 mW at 32 Ω, $31.44 (lowest offer on /deals today)Black PearlJCALLY AP6: 440 mW at 32 Ω, $39.99JCALLY AP7: 70 mW at 32 Ω, ~$45.73JCALLY JM7MAX: 118 mW at 32 Ω, $19.99JM7MAXJCALLY JM20: 31.3 mW at 32 Ω, ~$31.64JCALLY JM20 PRO: 31.3 mW at 32 Ω, ~$35.46JCALLY JM20MAX: 195 mW at 32 Ω, $29.99JM20MAXJCALLY JM30: 31.3 mW at 32 Ω, ~$27JCALLY JM30L: 31.3 mW at 32 Ω, $26.99JCALLY JM30PRO: 31.3 mW at 32 Ω, ~$46.49JCALLY JM45: 20 mW at 32 Ω, ~$26.50JCALLY JM45L: 20 mW at 32 Ω, ~$28.45JCALLY JM80E: 45 mW at 32 Ω, $39JCALLY JM98MAX: 195 mW at 32 Ω, $34.99JM98MAXJCALLY SP30: 31.3 mW at 32 Ω, ~$54.61NiceHCK NK1 Ultra: 122 mW at 32 Ω, $29.99NK1 UltraFiiO JIEZI B: 34 mW at 32 Ω, $22.99FiiO KA2
  • Nearby
  • Same DAC chip
  • Most IEMs, 3.2 mW

Devices with the same DAC chip

CS43131 · 24 devices use it
JCALLYJM30L31.25 mW$26.9931.25 mW · $26.99
JCALLYJM3031.25 mW~$2731.25 mW · ~$27
FiiOKA11200 mWNoSGM8262$29.99200 mW · $29.99PEQ No · Amp SGM8262
JCALLYJM20MAX195 mWSGM8262$29.99195 mW · $29.99Amp SGM8262
TRNWorks with ContourBlack Pearl320 mWWorks with Contour10 bands$31.44320 mW · $31.44PEQ Yes, 10 bands
JCALLYJM2031.25 mW~$31.6431.25 mW · ~$31.64
JCALLYJM20 PRO31.25 mWYes8 bands~$35.4631.25 mW · ~$35.46PEQ Yes, 8 bands
TANCHJIMSPACE LITE98 mW$39.9998 mW · $39.99
SnowskyWorks with ContourMelody>250 mW0.736 ΩMeasuredWorks with Contour10 bands$39.99>250 mW · 0.736 Ω · $39.99PEQ Yes, 10 bands
JCALLYJM30PRO31.25 mW~$46.4931.25 mW · ~$46.49
JCALLYSP3031.25 mW~$54.6131.25 mW · ~$54.61
TempoTecSonata BHD Pro280 mW$59.90280 mW · $59.90

All 24 in the finder

Compared with

Manufacturers' stated figures; the price is today's lowest

FiiO KA2 vs FiiO KA3

At 32 Ω FiiO KA2 is listed at ≥153 mW and FiiO KA3 at ≥235 mW; the lowest prices are $34.59 and $95.94, $61.35 apart.

FiiO KA2 vs FiiO KA3: the manufacturers' stated figures and today's lowest price, side by side
FiiO KA2FiiO KA3
Power at 32 Ω≥153 mW4.4 mm balanced≥235 mW4.4 mm balanced, Claim variant: comparison table
Price today$34.59eBay, 16 Oct$95.94eBay, 16 Oct
DAC chipCS43131 × 2ES9038Q2M
InputsUSB-C cable, Lightning cableUSB-C
Outputs4.4 mm balanced3.5 mm · 4.4 mm balanced
SizeAbout 40 × 15 × 12 mm56.3 × 20.2 × 12 mm
WeightAbout 12.3 gAbout 17.5 g

More like this

More portable DAC amps

Sources

Checked 14 Oct 2026
KA2 specifications
fiio.com · the spec sheet
Used for output impedance, noise and distortion, formats, the DAC chip, input, outputs, the app, size and weight
KA series comparison
fiio.com
Used for power
KA2 product page
fiio.com · the product page
Used for the app