The Letshuoer Cadenza12 is 16Ω at 110.0 dB/mW; the Letshuoer DZ4 is 12Ω at 104.0 dB/mW. This page is only about what they ask of an amplifier — not how they sound, which no specification on either sheet can tell you.
The DZ4 needs 6.0 dB more than the Cadenza12 to reach the same loudness — 0.40 mW against 0.10 mW.
| Specification | Cadenza12 | DZ4 |
|---|---|---|
| Impedance | 16 Ω | 12 Ω |
| Sensitivity | 110.0 dB/mW | 104.0 dB/mW |
| Sensitivity (voltage) | 128.0 dB/V | 123.2 dB/V |
| Power for 100 dB | 0.10 mW | 0.40 mW |
| Voltage for 100 dB | 40 mV | 69 mV |
| Current for 100 dB | 2.5 mA | 5.8 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 2.00 Ω | 1.50 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
Every source in the database that drives one of them drives the other. On power, the choice between these two changes nothing about what amplifier you need.
5 sources are low enough in output impedance for the Cadenza12 under the one-eighth rule but not for the DZ4 (FiiO KA13, Schiit Vali 2+, Astell&Kern HC3, 2 more).
12 sources stay below the audible-hiss threshold with the DZ4 but cross it with the Cadenza12 (Lake People G103-S Mk II, Lake People G111 Mk II, Grace Design m900, 9 more).
280 of the 280 sources here reach 100 dB on both. That count is about power only — the output-impedance and hiss lines above are separate questions, and a source can pass this one and fail those.
Each model has a page of its own with the full source list, the hiss estimate and the provenance of every figure above: Letshuoer Cadenza12 and Letshuoer DZ4. Every figure on this page comes from what Letshuoer published, or is derived from it — what that maker publishes, counted.