FiiO K11 R2R vs Loxjie A30

Short answer

More power: the FiiO K11 R2R, with 460 mW into 32 Ω; the Loxjie A30 has 100 mW. The FiiO K11 R2R drives 7 headphones to 100 dB that the Loxjie A30 cannot (Moondrop COSMO, Moondrop PARA, Moondrop PARA 2, 4 more).
Hiss with sensitive IEMs: cannot be compared — the maker of the Loxjie A30 publishes no noise figure.
Price: the FiiO K11 R2R costs $6 more; what that buys on these numbers is set out further down, under What the price difference buys.

Both are desktop DAC/amps, $176 against $170.

The FiiO K11 R2R reaches 100 dB on 567 of the 567 models here, the Loxjie A30 on 560.

Side by side

Every published figure, next to each other

Specification	FiiO K11 R2R	Loxjie A30
Power into 32Ω	460 mW	100 mW
Power into 150Ω	99 mW	21 mW
Power into 300Ω	50 mW	11 mW
Power into 600Ω	25 mW	5.3 mW
Output impedance	1.0 Ω	not published
Output noise	7.2 µV	not published
Price	$176	$170
Headphones it reaches 100 dB on out of 567	567	560

Not published means the maker leaves it out, so that axis cannot be compared.

Balanced output

The 4.4 mm or XLR socket, rated on its own

Balanced	FiiO K11 R2R	Loxjie A30
Socket	4.4mm	no separate rating
Power into 32Ω	1.3 W	—
Power into 300Ω	220 mW	—
Output impedance	1.5 Ω	—
Output noise	14.1 µV	—
Headphones it reaches 100 dB on out of 567	567	—

Only the FiiO K11 R2R has a separate balanced rating from its maker; through it, it reaches 100 dB on 567 of the 567 models here. The Loxjie A30 may still have a balanced socket — its spec sheet simply gives no figure for one, so there is nothing to put beside it.

How solid these numbers are

Where each power figure comes from

Load	FiiO K11 R2R	Loxjie A30
32 Ω	Published	Published
150 Ω	Derived	Derived
300 Ω	Published	Derived
600 Ω	Derived	Derived

Both makers publish a power rating. FiiO K11 R2R publishes at 32 Ω and at 300 Ω; Loxjie A30 at 32 Ω. The other rows are worked out from those.

So the two columns are not equally firm row by row: at 300 Ω only the FiiO K11 R2R figure is the maker’s own. On those rows the derived number is the one to doubt first.

What the labels mean.

What separates them

The headphones that tell them apart

7 headphones reach 100 dB on the FiiO K11 R2R but not on the Loxjie A30 — Moondrop COSMO, Moondrop PARA, Moondrop PARA 2, 4 more.

560 of the 567 models here reach 100 dB on both.

On real headphones

Headroom and hiss on 8 models, both sources

Headroom is at a 100 dB SPL peak.

The widest gap on the list is the Shure SE846: FiiO K11 R2R has +40 dB of headroom there against +28 dB. 11 dB is about 13 times the power, which matters for peaks rather than for how loud the music sits.

The hiss columns are empty for Loxjie A30 because that maker publishes no output noise figure.

Headphone	Impedance	Needs	FiiO K11 R2R headroom	Loxjie A30 headroom	FiiO K11 R2R hiss	Loxjie A30 hiss
Shure SE846	9 Ω	0.04 mW	+40 dB	+28 dB	32 dB	not published
Campfire Audio Andromeda 2020	9 Ω	4.0 mW	+20 dB	+8 dB	12 dB	not published
Audeze LCD-2 Classic	70 Ω	0.79 mW	+24 dB	+18 dB	10 dB	not published
Beyerdynamic DT 1990 Pro (250Ω)	250 Ω	0.63 mW	+20 dB	+13 dB	5 dB	not published
HiFiMAN HE400se	25 Ω	7.9 mW	+18 dB	+10 dB	4 dB	not published
Audio-Technica ATH-R70X	470 Ω	1.6 mW	+13 dB	+6 dB	-2 dB	not published
Sennheiser HD 600	300 Ω	6.6 mW	+9 dB	+2 dB	-6 dB	not published
HiFiMAN Susvara	60 Ω	50 mW	+7 dB	+0 dB	-8 dB	not published

What the price difference buys

The gap in dollars, against the gap in numbers

The FiiO K11 R2R costs $6 more than the Loxjie A30. Out of the 567 models here, that difference buys 7 more models driven to 100 dB.

Nothing runs the other way: there is no axis here on which the cheaper of the two does better.

Only published figures count here; blank axes are counted separately.

Each in full: FiiO K11 R2R and Loxjie A30.