Uploaded March 2026 | Updated September 2026, 2 weeks ago

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Thanks to Apos Audio for sending the SA-2 for review!

Buy from Apos (affiliate link): https://apos.audio/products/singxer-sa-2-fully-balanced-headphone-amplifier?sca_ref=1448954.julYPU81dF

Buy from Amazon (affiliate link): amzn.to/4suBsja

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Test Gear…

All music was lossless or hi-rez FLAC files or DSD files played locally, or in the case of FLAC also streamed from Qobuz, all through Roon.

Chain 1…

Sonore opticalRendu Deluxe (review coming!) usb into Berkeley Alpha USB (youtu.be/94AvDeeRjHA) then AES into Berkeley Alpha S2 DAC (youtu.be/JY3c4HEyH0s), XLR output to SA-2

Chain 2…

FiiO SR11 streamer (youtu.be/YuagbK8p0FA) USB output into Schiit Mimir (youtu.be/JnT_3HpAHt0) then XLR output into SA-2.

Chain 3…

Same as Chain 2 except swap out Mimir for FiiO BR15 (review coming soon!)

Chain 4…

Chord 2Go + 2Yu streamer/DDC (youtu.be/S3O7JNOJIqI) USB output into Ferrum WANDLA GSE (youtu.be/Qh1b-XFH7R8) then XLR output into SA-2.

Headphones Used...

Beyerdynamic DT 880 600 ohm: youtu.be/iDaUsS2rFrk++
Focal Radiance: youtu.be/rXnmlXCf_bA
Focal Utopia (OG) (1): youtu.be/sqHjnH6EdM4
(2): youtu.be/tb3le-TwGnQ
HiFiMan HE1000 Unveiled: youtu.be/pSXKdoYg0Tc
HiFiMan Susvara (1): youtu.be/mZJ78eXWkt0
(2): youtu.be/oUrJx173P5M
Massdrop + Sennheiser HD6XX: youtu.be/02Um5rMNYS8
SJY Horizon Closed Carbon: youtu.be/8UOM3K_VLDc

Compared Amps...

Aune S17 Pro EVO: youtu.be/kKBhzMKcs38
Lake People G111mk2: youtu.be/kSxg9OJWlXQ
Schiit Jotunheim 3: youtu.be/GhLNMFzcr74

Timestamps...

00:00 Intro, Pricing, Disclaimer
01:11 Shameless Self Promotion
01:39 Takeaways
02:20 About the SA-2
10:41 Test Gear in Description
10:52 Sound
20:50 Comparisons with Jotunheim 3 & S17 Pro EVO
23:13 Final Thoughts