AudioChainsDB
Moondrop

Chu II

headphones

$23

Used market: $20*

Manufacturer datasheet

Specifications

3 of 6 values have a recorded source
Connector
0.78 mm 2-pin, 3.5 mm single-ended plug·
Form Factor
In-Ear·
Impedance ohms
18✓
Transducer Type
Dynamic·
Detachable Cable
yes·
Sensitivity dB V
119✓

Expert Audio Engineering Commentary

Tonal Profile

The first Chu had a fixed cable and 28 Ω; Chu II moved to a detachable 2-pin and dropped to 18 Ω. The lower impedance matters more than the price: an 18 Ω load in front of a laptop jack with 30–50 Ω of output impedance loses roughly 5–7 dB and, worse, follows the driver's impedance curve instead of the signal.

* Estimated with the depreciation fallback (~87% retained value). · checked on 8/5/2026