The Final Audio A5000 is 18Ω at 100.0 dB/mW; the Final Audio E5000 is 14Ω at 93.0 dB (no reference unit printed). This page covers what they ask of an amplifier, not how they sound.
The E5000 needs 7.0 dB more than the A5000 to reach the same loudness — 5.0 mW against 1.0 mW.
| Specification | A5000 | E5000 |
|---|---|---|
| Impedance | 18 Ω | 14 Ω |
| Sensitivity | 100.0 dB/mW | 93.0 dB |
| Sensitivity (voltage) | 117.4 dB/V | 111.5 dB/V |
| Power for 100 dB | 1.0 mW | 5.0 mW |
| Voltage for 100 dB | 0.13 V | 0.26 V |
| Current for 100 dB | 7.5 mA | 18.9 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 2.25 Ω | 1.75 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
One caution before reading the rows. Final Audio E5000 printed a decibel figure with no reference unit, so this page reads it as per milliwatt. If it is really per volt, that model 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.
4 sources are low enough in output impedance for the A5000 under the one-eighth rule but not for the E5000 (Schiit Vali 2+, Astell&Kern HC3, RME Fireface UFX II, 1 more).
1 source stays below the audible-hiss threshold with the E5000 but crosses it with the A5000 (Schiit Mjolnir 3).
280 of the 280 sources here reach 100 dB on both.
The E5000 is more demanding than 69% of the 567 non-electrostatic models in this database; the A5000 than 43%.
| dB SPL | A5000 power | A5000 voltage | E5000 power | E5000 voltage |
|---|---|---|---|---|
| 80 | 0.01 mW | 13 mV | 0.05 mW | 26 mV |
| 85 | 0.03 mW | 24 mV | 0.16 mW | 47 mV |
| 90 | 0.10 mW | 42 mV | 0.50 mW | 84 mV |
| 95 | 0.32 mW | 75 mV | 1.6 mW | 0.15 V |
| 100 | 1.0 mW | 0.13 V | 5.0 mW | 0.26 V |
| 105 | 3.2 mW | 0.24 V | 16 mW | 0.47 V |
| Source | Price | Headroom, A5000 | Headroom, E5000 | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 12.3 dB | 4.2 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 23.7 dB | 16.3 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR11 | $36 | 16.2 dB | 9.0 dB | 0.5 Ω | 8.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. 69 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 69 is the JadeAudio JA11, at $20. It leaves 12.3 dB of headroom on the A5000 and 4.2 dB on the E5000, its output impedance is 0.5 Ω against a one-eighth limit of 2.25 Ω and 1.75 Ω, and its noise figure puts the hiss floor 18 dB and 24 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| A5000 | nothing printed | — | — |
| E5000 | nothing printed | — | — |
Final Audio prints the same thing for both the A5000 and the E5000: nothing at all.
There is nothing here to compare, and that is worth saying plainly rather than filling the gap with somebody else’s measurement. Of the 578 models checked against a maker document so far, 490 carry a printed range and only 58 of those print the ±dB tolerance that would make a range mean anything.
Not a measurement; maker by maker.
Both have a page of their own. In full: Final Audio A5000 and Final Audio E5000. Each figure on this page is labelled on those pages with where it came from, including the ones Final Audio never published — what that maker publishes, counted.