The CCA CRA is 25Ω at 105.0 dB (no reference unit printed); the CCA Xyrra is 27Ω at 110.0 dB (no reference unit printed). This page covers what they ask of an amplifier, not how they sound.
The CRA needs 5.0 dB more than the Xyrra to reach the same loudness — 0.32 mW against 0.10 mW.
| Specification | CRA | Xyrra |
|---|---|---|
| Impedance | 25 Ω | 27 Ω |
| Sensitivity | 105.0 dB | 110.0 dB |
| Sensitivity (voltage) | 121.0 dB/V | 125.7 dB/V |
| Power for 100 dB | 0.32 mW | 0.10 mW |
| Voltage for 100 dB | 89 mV | 52 mV |
| Current for 100 dB | 3.6 mA | 1.9 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 3.12 Ω | 3.38 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
One caution before reading the rows. CCA CRA and CCA Xyrra 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.
14 sources stay below the audible-hiss threshold with the CRA but cross it with the Xyrra (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 CRA is more demanding than 28% of the 567 non-electrostatic models in this database; the Xyrra than 13%.
| dB SPL | CRA power | CRA voltage | Xyrra power | Xyrra voltage |
|---|---|---|---|---|
| 80 | 3.2 µW | 9 mV | 1.0 µW | 5 mV |
| 85 | 0.01 mW | 16 mV | 3.2 µW | 9 mV |
| 90 | 0.03 mW | 28 mV | 0.01 mW | 16 mV |
| 95 | 0.10 mW | 50 mV | 0.03 mW | 29 mV |
| 100 | 0.32 mW | 89 mV | 0.10 mW | 52 mV |
| 105 | 1.0 mW | 0.16 V | 0.32 mW | 92 mV |
| Source | Price | Headroom, CRA | Headroom, Xyrra | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 18.7 dB | 24.0 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 28.2 dB | 33.1 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 25.2 dB | 30.1 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 18.7 dB of headroom on the CRA and 24.0 dB on the Xyrra, its output impedance is 0.5 Ω against a one-eighth limit of 3.12 Ω and 3.38 Ω, and its noise figure puts the hiss floor 14 dB and 10 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| CRA | 20-40kHz | not printed | not printed |
| Xyrra | 20-40000Hz | not printed | not printed |
CCA prints 20-40kHz for the CRA and 20-40000Hz for the Xyrra.
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: CCA CRA and CCA Xyrra. Each figure on this page is labelled on those pages with where it came from, including the ones CCA never published — what that maker publishes, counted.