Short answer: the TANGZU TianPeng. It ranks #137 of 1291 in-ear headphones by sound quality, rated 4.4/5, at $629; the BGVP Astrum ranks #235, rated 4.3/5, and costs $699, so there is little reason to consider the other one.
The case for the TANGZU TianPeng: Squig.link measurements from six hobbyists give the TianPeng a preference score of 79.1 with a tidy 1.43 dB deviation, so its eight driver hybrid of dynamic, balanced armature and bone conduction units hangs together coherently. The tradeoff: A 4.5 dB dip near 4.1 kHz and a presence band 2.3 dB below target take some bite out of vocals and guitars, which can sound slightly veiled.
What the BGVP Astrum does well: The median of 10 hobbyist measurements gives it a very good Harman preference score of 77 with a 1.49 dB spread, and its mids sit within about 1.5 dB of target, so vocals and instruments sound natural. The tradeoff: Its 1.49 dB spread is less even than the best measured sets.
Buy the TANGZU TianPeng. It is rated higher for sound quality than the BGVP Astrum and costs less, which makes it the one to get unless you need something the other one does better.
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Squig.link measurements from six hobbyists give the TianPeng a preference score of 79.1 with a tidy 1.43 dB deviation, so its eight driver hybrid of dynamic, balanced armature and bone conduction units hangs together coherently.
Linsoul $629.00 eBay
The median of 10 hobbyist measurements gives it a very good Harman preference score of 77 with a 1.49 dB spread, and its mids sit within about 1.5 dB of target, so vocals and instruments sound natural.
BGVP $699.00 eBayPrices on this page were last checked October 16, 2026 at 5:46 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| TANGZU TianPeng | BGVP Astrum | |
|---|---|---|
| Price | $629.00 | $699.00 |
| Ranked | #137 of 1291 in In-Ear Headphones | #235 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 79 (median of 6 squig.link measurements, calibrated to AutoEQ) | 77 (median of 10 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.43 dB standard deviation | 1.49 dB standard deviation |
| Tonal Tilt | -0.50 (negative is warmer, positive brighter) | -0.42 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.0 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 6 balanced armature + 1 bone conduction) | Tribrid |
| Drivers | 1 x 14.2mm dynamic + 6 x balanced armature + 1 x piezoelectric bone conduction | 2 x 8mm dynamic + 2 x balanced armature + 2 x electrostatic |
| Impedance | 9.8 ohms | 12 ohms |
| Sensitivity | 104 dB | 111 dB/Vrms |
| Built-in Microphone | No | - |
| Frequency Response | - | 20Hz - 40kHz |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the TANGZU TianPeng from audioamigo, bassaudio, csi-zone, jaytiss, koi and soundignity; the BGVP Astrum from aden, animagus, audioamigo, dchpgall, faxepremium, hu-fi, jaytiss, pw, soundcheck39 and tonedeafmonk, all via squig.link.
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