Topping A30 Pro: power output and what it will drive

The Topping A30 Pro is a desktop amplifier at $249. It delivers 5.5 W into 32Ω and 840 mW into 300Ω, which ranks it 8 of 280 for raw power among the sources in this database.

Measured at 100 dB SPL it has comfortable headroom on 567 of the 567 dynamic and planar headphones catalogued here. Power is published at 16Ω, 32Ω, 300Ω; the rest of the table is derived from those figures.

Specifications

What it actually puts out

TypeDesktop amplifier

Price$249

Power into 32 Ω5.5 W

Power into 150 Ω1.4 W

Power into 300 Ω840 mW

Power into 600 Ω420 mW

Output impedance0.1 Ω

Output noise0.3 µV

Comfortable headroom on 567 of 567 headphones (100%)

Provenance

Where these numbers come from

The manufacturer publishes 6.0 W into 16Ω, 5.5 W into 32Ω, 840 mW into 300Ω. The rest of the table is worked out from those.

Derived rows hold output voltage steady, as an amplifier does (method).

Source: toppingaudio.com.

Load	Power	Status	How it was arrived at
16 Ω	6.0 W	Published	the manufacturer publishes this figure at this exact load
32 Ω	5.5 W	Published	the manufacturer publishes this figure at this exact load
150 Ω	1.4 W	Derived	worked out between two published loads, holding output voltage linear between them
300 Ω	840 mW	Published	the manufacturer publishes this figure at this exact load
600 Ω	420 mW	Derived	beyond the published loads, holding output voltage constant — which understates rather than flatters

Matching

Against 40 well-known headphones

Easiest to hardest to drive, with headroom at a 100 dB SPL peak.

Headphone	Impedance	Sensitivity	Needs	Headroom	Verdict
Shure SE846	9 Ω	114.0 dB/mW	0.04 mW	+49 dB	Comfortable faint hiss
64 Audio U12t	12.6 Ω	108.0 dB/mW	0.16 mW	+45 dB	Comfortable
Shure SE215	17 Ω	107.0 dB/mW	0.20 mW	+45 dB	Comfortable
Moondrop Aria	32 Ω	107.1 dB/mW	0.19 mW	+45 dB	Comfortable
Audeze LCD-X 2021	20 Ω	103.0 dB/mW	0.50 mW	+41 dB	Comfortable
Truthear Hexa	20.5 Ω	103.1 dB/mW	0.49 mW	+41 dB	Comfortable
Sennheiser IE 200	18 Ω	101.6 dB/mW	0.69 mW	+39 dB	Comfortable
Sony MDR-7506	63 Ω	106.0 dB/mW	0.25 mW	+41 dB	Comfortable
Meze 99 Classics	32 Ω	103.0 dB/mW	0.50 mW	+40 dB	Comfortable
Focal Clear MG	55 Ω	104.0 dB/mW	0.40 mW	+39 dB	Comfortable
Philips SHP9500	32 Ω	101.0 dB	0.79 mW	+38 dB	Comfortable
Focal Utopia	80 Ω	104.0 dB/mW	0.40 mW	+38 dB	Comfortable
Meze Empyrean	32 Ω	100.0 dB	1.0 mW	+37 dB	Comfortable
Campfire Audio Andromeda 2020	9 Ω	94.0 dB	4.0 mW	+29 dB	Comfortable
Etymotic ER2SE	15 Ω	96.0 dB/mW	2.5 mW	+34 dB	Comfortable
AKG K371	32 Ω	99.1 dB/mW	1.2 mW	+37 dB	Comfortable
Audio-Technica ATH-M50X	38 Ω	99.0 dB/mW	1.3 mW	+36 dB	Comfortable
Beyerdynamic DT 900 Pro X	48 Ω	100.0 dB/mW	1.0 mW	+36 dB	Comfortable
Audeze LCD-2 Classic	70 Ω	101.0 dB/mW	0.79 mW	+35 dB	Comfortable
Grado SR80x	38 Ω	98.0 dB/mW	1.6 mW	+35 dB	Comfortable
Sennheiser HD 560S	120 Ω	100.8 dB/mW	0.83 mW	+33 dB	Comfortable
HiFiMAN Edition XS	18 Ω	92.0 dB	6.3 mW	+30 dB	Comfortable
HiFiMAN Arya Stealth	32 Ω	94.0 dB	4.0 mW	+31 dB	Comfortable
Dan Clark Audio AEON 2 Closed	13 Ω	90.0 dB/mW	10 mW	+27 dB	Comfortable
Audeze LCD-5	14 Ω	90.0 dB/mW	10 mW	+27 dB	Comfortable
Beyerdynamic DT 1990 Pro (250Ω)	250 Ω	102.0 dB/mW	0.63 mW	+32 dB	Comfortable
HiFiMAN HE400se	25 Ω	91.0 dB	7.9 mW	+28 dB	Comfortable
HiFiMAN Sundara	32 Ω	92.0 dB	6.3 mW	+29 dB	Comfortable
Dan Clark Audio Stealth	23 Ω	90.0 dB/mW	10 mW	+27 dB	Comfortable
Fostex T50RP MK3	50 Ω	92.0 dB/mW	6.3 mW	+28 dB	Comfortable
AKG K702	62 Ω	92.9 dB/mW	5.1 mW	+28 dB	Comfortable
ZMF Verite Closed	300 Ω	99.0 dB/mW	1.3 mW	+28 dB	Comfortable
Sennheiser HD 650	300 Ω	97.8 dB/mW	1.7 mW	+27 dB	Comfortable
Sennheiser HD 800S	300 Ω	96.8 dB/mW	2.1 mW	+26 dB	Comfortable
Beyerdynamic DT 770 Pro (250Ω)	250 Ω	96.0 dB	2.5 mW	+26 dB	Comfortable
Audio-Technica ATH-R70X	470 Ω	98.0 dB/mW	1.6 mW	+25 dB	Comfortable
ZMF Atrium	300 Ω	96.0 dB/mW	2.5 mW	+25 dB	Comfortable
Abyss AB-1266 Phi TC	50 Ω	88.0 dB/mW	16 mW	+24 dB	Comfortable
Sennheiser HD 600	300 Ω	91.8 dB/mW	6.6 mW	+21 dB	Comfortable
HiFiMAN Susvara	60 Ω	83.0 dB	50 mW	+18 dB	Comfortable

Noise

Will it hiss?

At 0.3 µV of output noise, here is where that noise lands in the five most revealing in-ears in the database.

This one hisses. With the most sensitive in-ears in the database its own noise lands around 11 dB SPL, which you will hear between tracks and in quiet passages.

In-ear	Impedance	Sensitivity	Hiss level
Simgot EA500	16 Ω	141.0 dB/V	11 dB SPL
Tanchjim EA FORCE	17 Ω	137.7 dB/V	7 dB SPL
Shure SE846	9 Ω	134.5 dB/V	4 dB SPL
Campfire Audio Clara	13.3 Ω	134.1 dB/V	4 dB SPL
64 Audio Fourte	10 Ω	134.0 dB/V	4 dB SPL

Damping

Output impedance and the one-eighth rule

At 0.1Ω output impedance this source satisfies the one-eighth rule with every headphone in the database, down to the 3Ω in-ears. Nothing here will have its frequency response shaped by the source.

Check any pair.

Cheaper

The cheapest thing here that does the same job

Source	Type	Price	Into 300 Ω	Output impedance	Output noise
Topping L30 II	desktop amplifier	$149	560 mW	0.1 Ω	0.3 µV

Of the 280 sources here, 1 do everything the Topping A30 Pro does as a headphone output: reach 100 dB on every headphone it reaches, stay inside the one-eighth rule wherever it does and stay under the audible-hiss threshold wherever it does. The cheapest of them is the Topping L30 II at $149, against this one’s $249 — $100 less.

This counts the headphone output only; inputs, converters, the volume control and the build are outside it.

Alternatives

Compared with its closest rivals: vs Bottlehead Crack (OTL kit) · vs Schiit Magni Piety · vs Schiit Midgard · vs Schiit Valhalla 2.

Compare any two or match your own headphones. Every Topping source here.

Topping A30 Pro: power output and what it will drive

What it actually puts out

Where these numbers come from

Against 40 well-known headphones

Will it hiss?

Output impedance and the one-eighth rule

The cheapest thing here that does the same job

Other desktop amplifiers at a similar price

Topping L50

Schiit Midgard

Schiit Asgard 3

SMSL SH-9

SMSL H300

Schiit Magni Piety