Gustard H26 vs Singxer SA-1: Which Drives More Headphones?

Gustard H26 vs Singxer SA-1

Short answer

More power: the Gustard H26, with 9.70 W into 32 Ω; the Singxer SA-1 has 5.50 W. Both drive 567 of the 567 non-electrostatic headphones here to 100 dB, so on that test the difference changes nothing.
Hiss with sensitive IEMs: cannot be compared — the maker of the Gustard H26 publishes no noise figure.
Output impedance: 51 headphones are left alone by the Gustard H26 under the one-eighth rule but coloured by the Singxer SA-1 (64 Audio Aspire 1, 64 Audio Fourte, 64 Audio Nio, 48 more).
Price: the Gustard H26 costs $400 more; what that buys on these numbers is set out further down, under What the price difference buys.

Both are desktop amplifiers, $1099 against $699.

On raw power they are level: each reaches 100 dB on 567 of the 567 non-electrostatic models here.

Every published figure, next to each other

Specification	Gustard H26	Singxer SA-1
Power into 32Ω	9.7 W	5.5 W
Power into 150Ω	2.1 W	1.6 W
Power into 300Ω	1.0 W	785 mW
Power into 600Ω	517 mW	380 mW
Output impedance	0.1 Ω	1.4 Ω
Output noise	not published	0.3 µV
Price	$1099	$699
Headphones it reaches 100 dB on out of 567	567	567

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

Where each power figure comes from

Load	Gustard H26	Singxer SA-1
32 Ω	Published	Published
150 Ω	Derived	Derived
300 Ω	Derived	Derived
600 Ω	Derived	Published

Both makers publish a power rating. Gustard H26 publishes at 32 Ω; Singxer SA-1 at 32 Ω and at 600 Ω. The other rows are worked out from those.

So the two columns are not equally firm row by row: at 600 Ω only the Singxer SA-1 figure is the maker’s own. On those rows the derived number is the one to doubt first.

What the labels mean.

The headphones that tell them apart

On power they are interchangeable across this whole database: there is no headphone here that one reaches 100 dB on and the other does not.

51 headphones are left alone by the Gustard H26 under the one-eighth rule but coloured by the Singxer SA-1 (64 Audio Aspire 1, 64 Audio Fourte, 64 Audio Nio, 48 more).

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

Headroom and hiss on 8 models, both sources

Headroom is at a 100 dB SPL peak.

The widest gap on the list is the Campfire Audio Andromeda 2020: Singxer SA-1 has +32 dB of headroom there against +28 dB. 3 dB is about 2.1 times the power, which matters for peaks rather than for how loud the music sits.

The hiss columns are empty for Gustard H26 because that maker publishes no output noise figure.

Headphone	Impedance	Needs	Gustard H26 headroom	Singxer SA-1 headroom	Gustard H26 hiss	Singxer SA-1 hiss
Shure SE846	9 Ω	0.04 mW	+48 dB	+52 dB damping	not published	4 dB
Campfire Audio Andromeda 2020	9 Ω	4.0 mW	+28 dB	+32 dB damping	not published	-16 dB
Audeze LCD-2 Classic	70 Ω	0.79 mW	+37 dB	+36 dB	not published	-18 dB
Beyerdynamic DT 1990 Pro (250Ω)	250 Ω	0.63 mW	+33 dB	+32 dB	not published	-22 dB
HiFiMAN HE400se	25 Ω	7.9 mW	+30 dB	+29 dB	not published	-23 dB
Audio-Technica ATH-R70X	470 Ω	1.6 mW	+26 dB	+25 dB	not published	-29 dB
Sennheiser HD 600	300 Ω	6.6 mW	+22 dB	+21 dB	not published	-33 dB
HiFiMAN Susvara	60 Ω	50 mW	+20 dB	+18 dB	not published	-35 dB

The gap in dollars, against the gap in numbers

The Gustard H26 costs $400 more than the Singxer SA-1. Out of the 567 models here, that difference buys 51 more models left alone under the one-eighth rule.

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.