The TRN Conch is 30Ω at 114.0 dB (no reference unit printed); the TRN MT1 is 22Ω at 106.0 dB (no reference unit printed). This page covers what they ask of an amplifier, not how they sound.
The MT1 needs 8.0 dB more than the Conch to reach the same loudness — 0.25 mW against 0.04 mW.
| Specification | Conch | MT1 |
|---|---|---|
| Impedance | 30 Ω | 22 Ω |
| Sensitivity | 114.0 dB | 106.0 dB |
| Sensitivity (voltage) | 129.2 dB/V | 122.6 dB/V |
| Power for 100 dB | 0.04 mW | 0.25 mW |
| Voltage for 100 dB | 35 mV | 74 mV |
| Current for 100 dB | 1.2 mA | 3.4 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 3.75 Ω | 2.75 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
One caution before reading the rows. TRN Conch and TRN MT1 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.
19 sources stay below the audible-hiss threshold with the MT1 but cross it with the Conch (Fosi Audio SK02, FiiO K11 R2R, Lake People G103-S Mk II, 16 more).
280 of the 280 sources here reach 100 dB on both.
The MT1 is more demanding than 23% of the 567 non-electrostatic models in this database; the Conch than 4%.
| dB SPL | Conch power | Conch voltage | MT1 power | MT1 voltage |
|---|---|---|---|---|
| 80 | 0.4 µW | 3 mV | 2.5 µW | 7 mV |
| 85 | 1.3 µW | 6 mV | 7.9 µW | 13 mV |
| 90 | 4.0 µW | 11 mV | 0.03 mW | 24 mV |
| 95 | 0.01 mW | 19 mV | 0.08 mW | 42 mV |
| 100 | 0.04 mW | 35 mV | 0.25 mW | 74 mV |
| 105 | 0.13 mW | 61 mV | 0.79 mW | 0.13 V |
| Source | Price | Headroom, Conch | Headroom, MT1 | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 28.5 dB | 19.1 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 37.1 dB | 29.4 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 34.0 dB | 26.3 dB | 0.6 Ω | 1.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. 51 of them also publish an output impedance low enough for both under the one-eighth rule and a noise figure that stays below the audible-hiss threshold with both.
The cheapest of the 51 is the JadeAudio JA11, at $20. It leaves 28.5 dB of headroom on the Conch and 19.1 dB on the MT1, its output impedance is 0.5 Ω against a one-eighth limit of 3.75 Ω and 2.75 Ω, and its noise figure puts the hiss floor 6 dB and 13 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| Conch | 20Hz-20000Hz | not printed | not printed |
| MT1 | 20Hz-20000Hz | not printed | not printed |
TRN prints the same thing for both the Conch and the MT1: 20Hz-20000Hz.
Neither range has a tolerance printed beside it, so the matching numbers say little.
Not a measurement; maker by maker.
Both have a page of their own. In full: TRN Conch and TRN MT1. 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.