The Meze 105 AER is 42Ω at 112.0 dB/mW; the Meze 99 Classics is 32Ω at 103.0 dB/mW. This page covers what they ask of an amplifier, not how they sound.
The 99 Classics needs 9.0 dB more than the 105 AER to reach the same loudness — 0.50 mW against 0.06 mW.
| Specification | 105 AER | 99 Classics |
|---|---|---|
| Impedance | 42 Ω | 32 Ω |
| Sensitivity | 112.0 dB/mW | 103.0 dB/mW |
| Sensitivity (voltage) | 125.8 dB/V | 117.9 dB/V |
| Power for 100 dB | 0.06 mW | 0.50 mW |
| Voltage for 100 dB | 51 mV | 0.13 V |
| Current for 100 dB | 1.2 mA | 4.0 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 5.25 Ω | 4.00 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.
1 source is low enough in output impedance for the 105 AER under the one-eighth rule but not for the 99 Classics (Shanling H5).
14 sources stay below the audible-hiss threshold with the 99 Classics but cross it with the 105 AER (FiiO BTR11, FiiO K11 R2R, Lake People G103-S Mk II, 11 more).
280 of the 280 sources here reach 100 dB on both.
The 99 Classics is more demanding than 41% of the 567 non-electrostatic models in this database; the 105 AER than 12%.
| dB SPL | 105 AER power | 105 AER voltage | 99 Classics power | 99 Classics voltage |
|---|---|---|---|---|
| 80 | 0.6 µW | 5 mV | 5.0 µW | 13 mV |
| 85 | 2.0 µW | 9 mV | 0.02 mW | 23 mV |
| 90 | 6.3 µW | 16 mV | 0.05 mW | 40 mV |
| 95 | 0.02 mW | 29 mV | 0.16 mW | 71 mV |
| 100 | 0.06 mW | 51 mV | 0.50 mW | 0.13 V |
| 105 | 0.20 mW | 92 mV | 1.6 mW | 0.23 V |
| Source | Price | Headroom, 105 AER | Headroom, 99 Classics | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 25.6 dB | 17.8 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 33.8 dB | 26.0 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 30.8 dB | 23.0 dB | 0.6 Ω | 1.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. 57 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 57 is the JadeAudio JA11, at $20. It leaves 25.6 dB of headroom on the 105 AER and 17.8 dB on the 99 Classics, its output impedance is 0.5 Ω against a one-eighth limit of 5.25 Ω and 4.00 Ω, and its noise figure puts the hiss floor 10 dB and 17 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| 105 AER | 5 Hz - 30 kHz | not printed | not printed |
| 99 Classics | 15 Hz - 25 kHz | not printed | not printed |
Meze prints 5 Hz - 30 kHz for the 105 AER and 15 Hz - 25 kHz for the 99 Classics.
Neither range has a tolerance printed beside it, so a wider range on one sheet is not deeper bass or more treble.
Not a measurement; maker by maker.
Both have a page of their own. In full: Meze 105 AER and Meze 99 Classics. Every figure on this page comes from what Meze published, or is derived from it — what that maker publishes, counted.