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USB-C DONGLE · CS43131 × 2

TRN Black Pearl

Works with Contour

A USB-C dongle with two CS43131 DAC chips, a 3.5 mm and a 4.4 mm balanced output, a built-in mic and a 10-band EQ in Contour.

Manual (PDF) · Manufacturer page · Price history

TRN Black Pearl on a plain white background
POWER AT 32 Ω320mW4.4 mm balanced, per channel not stated
OUTPUT IMPEDANCENot statedNo data from the manufacturer
SNR>121dBoutput not stated
PRICE$31.44Lowest price at Shenzhen Audio
OUTPUTS3.5 mm · 4.4 mm balanced
DAC CHIPCS43131 × 2
PARAMETRIC EQ10 bandsMEASUREDpeak, shelves; TRN states 8
Works with Contour

Numbers are the manufacturer's stated figures unless marked as measured; sources linked below. Figures marked Measured are my own, taken on the Soundblooms rig; the method is under My measurements.

Outputs and power

4.4 mm balanced
320mWat 32 Ω
Manual: 320 mW at 32 Ω, per channel or both channels not stated
Output impedance -
3.5 mm
125mWat 32 Ω
Manual: 125 mW at 32 Ω, per channel or both channels not stated
Output impedance -
SNR>121 dB
THD+N<0.00015% (TRN does not say for which output)

Not stated: gain, supply voltage, crosstalk.

Is it enough for your headphones?

TRN rates the Black Pearl at 320 mW into 32 Ω from the 4.4 mm balanced output. Below is how much of that is left to spare for each kind of headphones when you listen loud, with peaks at 110 dB. A figure marked est. is worked out from that rating.

Sensitive IEMsMulti-driver sets that hiss on strong sources
needs 0.6 mWest. 160 mW at 16 Ω+24 dB
Most IEMsTypical in-ears, 16 to 50 Ω
needs 3.2 mW320 mW at 32 Ω+20 dB
Easy-to-drive headphonesClosed and portable, 32 Ω
needs 16 mW320 mW at 32 Ω+13 dB
Hard-to-drive headphones300 Ω, HD 600 class, hungry for voltage
needs 20 mWest. 34 mW at 300 Ω+2 dB
Most planarsPlanar magnetic, low impedance, need current
needs 50 mW320 mW at 32 Ω+8 dB
Demanding planarsThe hardest loads, desktop territory
needs 251 mWest. 171 mW at 60 Ω2 dB short

Where to buy

Some shop links are affiliate links: if you buy through one, I may earn a commission. Your price and the order stay the same.

Shenzhen Audio · read 11 Nov 2026$31.44The HiFi Cat · read 11 Nov 2026$36.99Linsoul · read 11 Nov 2026$36.99HiFiGo · sold out, read 11 Nov 2026$36.99

Price historyCompare prices on Soundblooms Deals

The device

From TRN's manual unless marked
InputUSB-C
FormatsPCM up to 32-bit / 384 kHz, DSD256
DAC chipCS43131 × 2
VolumeSet with the source device's volume keys or player
MicSupports recording and call functions with a built-in microphone
IndicatorThree-color LED indicator (Blue: Standby, Green: PCM, Red: DSD)
BuildMetal chassis, tempered glass panel
Parametric EQ10 bands: peak, low shelf and high shelf, ±10 dB, Q 0.1 to 10Works with ContourTRN states 8 bands in the WALK PLAY app
Weight25 gThe manual also gives 87.5 g under basic product information.

The manual's basic product information gives Length 10.5 cm, Width 6 cm, Height 3 cm; it does not say whether this is the device or the box, so the catalog leaves dimensions empty.

How it stacks up against the competition

Power at 32 Ω · price in US dollars
200 mW500 mW100 mW$20$30$50scale breaks hereMost IEMs need 3.2 mW+20 dB to spareFiiO KA11: 200 mW at 32 Ω, $29.99KA11Questyle M12i: 21 mW at 32 Ω, $49TANCHJIM SPACE LITE: 98 mW at 32 Ω, $39.99FiiO KA2: 153 mW at 32 Ω, $34.59KA2Snowsky Melody: 250 mW at 32 Ω, $39.99MelodyHidizs S3 PRO: 55 mW at 32 Ω, $39.99Hidizs S9: 125 mW at 32 Ω, $49.99Hidizs SD2: 70 mW at 32 Ω, $35.99Hidizs XO: 195 mW at 32 Ω, $40.99XOTempoTec Sonata HD III: 70 mW at 32 Ω, $45.90HiBy FC3: 70 mW at 32 Ω, $39HiBy FC4: 340 mW at 32 Ω, $49FC4Snowsky Tiny A: 34 mW at 32 Ω, $19.99JCALLY AP6: 440 mW at 32 Ω, $39.99AP6JCALLY AP7: 70 mW at 32 Ω, ~$45.73JCALLY JM6: 28.2 mW at 32 Ω, $19.15JCALLY JM7MAX: 118 mW at 32 Ω, $19.99JCALLY JM20: 31.3 mW at 32 Ω, ~$31.64JCALLY JM20 PRO: 31.3 mW at 32 Ω, ~$35.46JCALLY JM20MAX: 195 mW at 32 Ω, $29.99JCALLY JM30: 31.3 mW at 32 Ω, ~$27JCALLY JM30L: 31.3 mW at 32 Ω, $26.99JCALLY JM30PRO: 31.3 mW at 32 Ω, ~$46.49JCALLY JM45: 20 mW at 32 Ω, ~$26.50JCALLY JM45L: 20 mW at 32 Ω, ~$28.45JCALLY JM80E: 45 mW at 32 Ω, $39JCALLY JM98MAX: 195 mW at 32 Ω, $34.99JM98MAXNiceHCK NK1 Ultra: 122 mW at 32 Ω, $29.99FiiO JIEZI A: 34 mW at 32 Ω, $18.99FiiO JIEZI B: 34 mW at 32 Ω, $22.99TRN Black Pearl200 mW500 mW100 mW$20$30$50scale breaks hereMost IEMs need 3.2 mW+20 dB to spareFiiO KA11: 200 mW at 32 Ω, $29.99KA11Questyle M12i: 21 mW at 32 Ω, $49TANCHJIM SPACE LITE: 98 mW at 32 Ω, $39.99FiiO KA2: 153 mW at 32 Ω, $34.59KA2Snowsky Melody: 250 mW at 32 Ω, $39.99MelodyHidizs S3 PRO: 55 mW at 32 Ω, $39.99Hidizs S9: 125 mW at 32 Ω, $49.99S9Hidizs SD2: 70 mW at 32 Ω, $35.99Hidizs XO: 195 mW at 32 Ω, $40.99XOTempoTec Sonata HD III: 70 mW at 32 Ω, $45.90HiBy FC3: 70 mW at 32 Ω, $39HiBy FC4: 340 mW at 32 Ω, $49FC4Snowsky Tiny A: 34 mW at 32 Ω, $19.99JCALLY AP6: 440 mW at 32 Ω, $39.99AP6JCALLY AP7: 70 mW at 32 Ω, ~$45.73JCALLY JM6: 28.2 mW at 32 Ω, $19.15JCALLY JM7MAX: 118 mW at 32 Ω, $19.99JCALLY JM20: 31.3 mW at 32 Ω, ~$31.64JCALLY JM20 PRO: 31.3 mW at 32 Ω, ~$35.46JCALLY JM20MAX: 195 mW at 32 Ω, $29.99JCALLY JM30: 31.3 mW at 32 Ω, ~$27JCALLY JM30L: 31.3 mW at 32 Ω, $26.99JCALLY JM30PRO: 31.3 mW at 32 Ω, ~$46.49JCALLY JM45: 20 mW at 32 Ω, ~$26.50JCALLY JM45L: 20 mW at 32 Ω, ~$28.45JCALLY JM80E: 45 mW at 32 Ω, $39JCALLY JM98MAX: 195 mW at 32 Ω, $34.99JM98MAXNiceHCK NK1 Ultra: 122 mW at 32 Ω, $29.99NK1 UltraFiiO JIEZI A: 34 mW at 32 Ω, $18.99FiiO JIEZI B: 34 mW at 32 Ω, $22.99TRN Black Pearl
  • Nearby
  • Same DAC chip
  • Most IEMs, 3.2 mW

Devices with the same DAC chip

CS43131 · 24 devices use it
JCALLYJM30L31.25 mW$26.9931.25 mW · $26.99
JCALLYJM3031.25 mW~$2731.25 mW · ~$27
FiiOKA11200 mWNoSGM8262$29.99200 mW · $29.99PEQ No · Amp SGM8262
JCALLYJM20MAX195 mWSGM8262$29.99195 mW · $29.99Amp SGM8262
JCALLYJM2031.25 mW~$31.6431.25 mW · ~$31.64
FiiOKA2≥153 mWNo$34.59≥153 mW · $34.59PEQ No
JCALLYJM20 PRO31.25 mWYes8 bands~$35.4631.25 mW · ~$35.46PEQ Yes, 8 bands
TANCHJIMSPACE LITE98 mW$39.9998 mW · $39.99
SnowskyWorks with ContourMelody>250 mW0.736 ΩMeasuredWorks with Contour10 bands$39.99>250 mW · 0.736 Ω · $39.99PEQ Yes, 10 bands
JCALLYJM30PRO31.25 mW~$46.4931.25 mW · ~$46.49
JCALLYSP3031.25 mW~$54.6131.25 mW · ~$54.61
TempoTecSonata BHD Pro280 mW$59.90280 mW · $59.90

All 24 in the finder

Compared with

Manufacturers' stated figures; the price is today's lowest

TRN Black Pearl vs FiiO KA11

At 32 Ω TRN Black Pearl is listed at 320 mW and FiiO KA11 at 200 mW; the lowest prices are $31.44 and $29.99, $1.45 apart.

TRN Black Pearl vs FiiO KA11: the manufacturers' stated figures and today's lowest price, side by side
TRN Black PearlFiiO KA11
Power at 32 Ω320 mW4.4 mm balanced200 mW3.5 mm, channel basis not specified in artwork
Power at 16 ΩNot stated245 mW3.5 mm
Price today$31.44Shenzhen Audio, 11 Nov$29.99HiFiGo, 16 Oct
DAC chipCS43131 × 2CS43131
InputsUSB-CUSB-C, Lightning
Outputs3.5 mm · 4.4 mm balanced3.5 mm
Weight25 g8.5 g

TRN Black Pearl price history · FiiO KA11 price history

More like this

More portable DAC amps

PEQ on Android: Contour EQ supports this dongle

Contour EQ is a free, open-source Android app that reads and writes the PEQ stored inside the TRN Black Pearl.

TRN Black Pearl EQ app for Android

Sources

Checked 27 Oct 2026
TRN Black Pearl user manual
aliexpress-media.com · the manual, PDF
Used for power, noise and distortion, formats, the DAC chip, outputs, parametric EQ, microphone, weight, build, the indicator and operating temperature
TRN Black Pearl, TRN Official Store
aliexpress.com

My measurements

Measured 22 Oct 2026
10bandsParametric EQ
Filters: peak, low shelf, high shelf; pass filters not tested in this run
Written to the device over USB and read back, 22 Oct 2026