Soncoz SGA1 vs xDuoo TA-30

Short answer

More power: the xDuoo TA-30, with 3.00 W into 32 Ω; the Soncoz SGA1 has 407 mW. The xDuoo TA-30 drives 1 headphone to 100 dB that the Soncoz SGA1 cannot (Symphonium Titan).
Hiss with sensitive IEMs: cannot be compared — the maker of the xDuoo TA-30 publishes no noise figure.
Price: the xDuoo TA-30 costs $109 more; what that buys on these numbers is set out further down, under What the price difference buys.

Both are desktop amplifiers, $600 against $709.

The xDuoo TA-30 reaches 100 dB on 567 of the 567 models here, the Soncoz SGA1 on 566.

Side by side

Every published figure, next to each other

Specification	Soncoz SGA1	xDuoo TA-30
Power into 32Ω	407 mW	3.0 W
Power into 150Ω	207 mW	640 mW
Power into 300Ω	210 mW	320 mW
Power into 600Ω	105 mW	160 mW
Output impedance	0.1 Ω	not published
Output noise	1.8 µV	not published
Price	$600	$709
Headphones it reaches 100 dB on out of 567	566	567

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	Soncoz SGA1	xDuoo TA-30
Socket	4-Pin XLR + 4.4mm	no separate rating
Power into 32Ω	407 mW derived	—
Power into 300Ω	840 mW	—
Output impedance	0.05 Ω	—
Output noise	3.6 µV	—
Headphones it reaches 100 dB on out of 567	566	—

Only the Soncoz SGA1 has a separate balanced rating from its maker; through it, it reaches 100 dB on 566 of the 567 models here. The xDuoo TA-30 may still have a balanced socket — its spec sheet simply gives no figure for one, so there is nothing to put beside it. Derived figures are worked out from the loads the maker did publish.

How solid these numbers are

Where each power figure comes from

Load	Soncoz SGA1	xDuoo TA-30
32 Ω	Derived	Published
150 Ω	Derived	Derived
300 Ω	Published	Derived
600 Ω	Published	Derived

Both makers publish a power rating. Soncoz SGA1 publishes at 300 Ω and at 600 Ω; xDuoo TA-30 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 and at 600 Ω only the Soncoz SGA1 figure is the maker’s own and at 32 Ω only the xDuoo TA-30 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

1 headphone reaches 100 dB on the xDuoo TA-30 but not on the Soncoz SGA1 — Symphonium Titan.

566 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 Campfire Audio Andromeda 2020: xDuoo TA-30 has +23 dB of headroom there against +15 dB. 9 dB is about 7.4 times the power, which matters for peaks rather than for how loud the music sits.

The hiss columns are empty for xDuoo TA-30 because that maker publishes no output noise figure.

Headphone	Impedance	Needs	Soncoz SGA1 headroom	xDuoo TA-30 headroom	Soncoz SGA1 hiss	xDuoo TA-30 hiss
Shure SE846	9 Ω	0.04 mW	+35 dB	+43 dB	20 dB	not published
Campfire Audio Andromeda 2020	9 Ω	4.0 mW	+15 dB	+23 dB	-0 dB	not published
Audeze LCD-2 Classic	70 Ω	0.79 mW	+25 dB	+32 dB	-2 dB	not published
Beyerdynamic DT 1990 Pro (250Ω)	250 Ω	0.63 mW	+25 dB	+28 dB	-7 dB	not published
HiFiMAN HE400se	25 Ω	7.9 mW	+16 dB	+25 dB	-8 dB	not published
Audio-Technica ATH-R70X	470 Ω	1.6 mW	+19 dB	+21 dB	-14 dB	not published
Sennheiser HD 600	300 Ω	6.6 mW	+15 dB	+17 dB	-18 dB	not published
HiFiMAN Susvara	60 Ω	50 mW	+8 dB	+15 dB	-20 dB	not published

What the price difference buys

The gap in dollars, against the gap in numbers

The xDuoo TA-30 costs $109 more than the Soncoz SGA1. Out of the 567 models here, that difference buys 1 more model 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: Soncoz SGA1 and xDuoo TA-30.