Tangzu Wan'er S.G vs TRN CS4: which should you buy?

On aggregated review scores the Tangzu Wan'er S.G comes out ahead with a HearWiki score of 79. The full breakdown - sub-scores, specs and what reviewers actually said - is below.

Our pick: Tangzu Wan'er S.G - Great overall at around $19.

Wired IEMs

Score breakdown

Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.

Tangzu Wan'er S.G leads on 3 of 4 measures.

Tangzu Wan'er S.G
TRN CS4

HearWiki score

Sound

7.8

4.8

Value

9.3

6.8

Price (USD)

$19

$10

Generation & platform

The scores rank quality. This is the other question: is the newer one actually newer technology, or the same platform in a new shell?

Same generation

Both shipped in 2022. These are the same generation of hardware - nothing in the radio, the codecs or the noise cancelling separates them. The platform is level; the newer hardware shows up in convenience features instead - the TRN CS4 adds USB-C.

Wan'er S.G2022
CS42022

What differsWan'er S.GCS4

USB-C: No; Yes

Specifications

Wan'er S.GCS4

Type: Wired IEMs; Wired IEMs
Price (USD): $19; $10
HearWiki score: 79; 50
Released: 2022; 2022
Availability: Still sold new; Still sold new
Driver: 10 mm dynamic; 10 mm dynamic
Driver type: dynamic; dynamic
Driver size: 10 mm; 10 mm
Drivers per side: 1; 1
Frequency response: 20 Hz - 20 kHz; 20 Hz - 20 kHz
Impedance: 20 Ω; 23 Ω
Sensitivity: 107 dB/mW; 118 dB/mW
Active noise cancelling: No; No
ANC type: none; -
Transparency mode: No; -
Companion app: No; -
Custom EQ: No; -
Wear detection: No; -
Controls: none; -
Weight: 4.2 g; 4.2 g
Detachable cable: Yes; Yes
USB-C: No; Yes
Connector: 2-pin 0.78 mm; 2-pin 0.78 mm
Model code: Tangzu Wan'er Studio Edition; -

Specification comparison of Tangzu Wan'er S.G vs TRN CS4
Spec	Tangzu Wan'er S.G	TRN CS4
Type	Wired IEMs	Wired IEMs
Price (USD)	$19	$10
HearWiki score	79 / 100 Great	50 / 100 Weak
Released	2022	2022
Audio
Driver	10 mm dynamic	10 mm dynamic
Driver type	dynamic	dynamic
Driver size	10 mm	10 mm
Drivers per side	1	1
Frequency response	20 Hz - 20 kHz	20 Hz - 20 kHz
Impedance	20 Ω	23 Ω
Sensitivity	107 dB/mW	118 dB/mW
Features
Active noise cancelling	No	No
ANC type	none	-
Transparency mode	No	-
Companion app	No	-
Custom EQ	No	-
Wear detection	No	-
Controls	none	-
Design
Weight	4.2 g	4.2 g
Detachable cable	Yes	Yes
USB-C	No	Yes
Connector	2-pin 0.78 mm	2-pin 0.78 mm
Model code	Tangzu Wan'er Studio Edition	-

What reviewers said

Tangzu Wan'er S.G

The Tangzu Wan'er S.G. is a budget-friendly wired IEM that focuses on delivering a pleasant, warm-leaning sound signature and solid build quality for its price. While it offers strong value with a comfortable fit and agreeable tuning, its technical performance—such as detail retrieval and high-frequency extension—is only average compared to pricier competitors.

Pro:Affordable price with strong overall value
Pro:Comfortable fit for extended listening
Pro:Warm and pleasing tonal balance

Con:Average technical performance and detail resolution
Con:High frequencies can be limited
Con:No included controls or app support

TRN CS4

The TRN CS4 is a very affordable wired IEM built around a single 10mm dynamic driver. It delivers energetic treble and respectable detail for the price, though its stock tuning can come across as sharp; with some tweaks, it offers surprisingly good imaging and soundstage for a budget model. A lightweight, detachable-cable design adds value at this low cost.

Pro:Strong treble energy
Pro:Decent detail retrieval
Pro:Surprisingly good imaging and soundstage for the price

Con:Can sound harsh out of the box
Con:Not especially polished stock tuning
Con:Limited frequency range

Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.

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New comparison Tangzu Wan'er S.G TRN CS4