The TRN Kirin is 32Ω at 106.0 dB (no reference unit printed); the TRN MT4 Pro is 40Ω at 113.0 dB (no reference unit printed). 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 Kirin needs 7.0 dB more than the MT4 Pro to reach the same loudness — 0.25 mW against 0.05 mW.
| Specification | Kirin | MT4 Pro |
|---|---|---|
| Impedance | 32 Ω | 40 Ω |
| Sensitivity | 106.0 dB | 113.0 dB |
| Sensitivity (voltage) | 120.9 dB/V | 127.0 dB/V |
| Power for 100 dB | 0.25 mW | 0.05 mW |
| Voltage for 100 dB | 90 mV | 45 mV |
| Current for 100 dB | 2.8 mA | 1.1 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 4.00 Ω | 5.00 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
One caution before reading the rows. TRN Kirin and TRN MT4 Pro printed a decibel figure with no reference unit, so this page reads it as per milliwatt. If it is really per volt, each of them needs far more than the table says. Why the two readings differ by so much.
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.
1 source is low enough in output impedance for the MT4 Pro under the one-eighth rule but not for the Kirin (Shanling H5).
15 sources stay below the audible-hiss threshold with the Kirin but cross it with the MT4 Pro (FiiO BTR11, FiiO K11 R2R, Lake People G103-S Mk II, 12 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: TRN Kirin and TRN MT4 Pro. Each figure on this page is labelled on those pages with where it came from, including the ones TRN never published — what that maker publishes, counted.