The EPZ 530 Pro is 32Ω at 110.0 dB (no reference unit printed); the EPZ Q5 Pro is 24Ω at 109.0 dB (no reference unit printed). This page covers what they ask of an amplifier, not how they sound.
The Q5 Pro needs 1.0 dB more than the 530 Pro to reach the same loudness — 0.13 mW against 0.10 mW.
| Specification | 530 Pro | Q5 Pro |
|---|---|---|
| Impedance | 32 Ω | 24 Ω |
| Sensitivity | 110.0 dB | 109.0 dB |
| Sensitivity (voltage) | 124.9 dB/V | 125.2 dB/V |
| Power for 100 dB | 0.10 mW | 0.13 mW |
| Voltage for 100 dB | 57 mV | 55 mV |
| Current for 100 dB | 1.8 mA | 2.3 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 4.00 Ω | 3.00 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
One caution before reading the rows. EPZ 530 Pro and EPZ Q5 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 stays below the audible-hiss threshold with the 530 Pro but crosses it with the Q5 Pro (FiiO M33 R2R).
280 of the 280 sources here reach 100 dB on both.
The 530 Pro is more demanding than 15% of the 567 non-electrostatic models in this database; the Q5 Pro than 13%.
| dB SPL | 530 Pro power | 530 Pro voltage | Q5 Pro power | Q5 Pro voltage |
|---|---|---|---|---|
| 80 | 1.0 µW | 6 mV | 1.3 µW | 5 mV |
| 85 | 3.2 µW | 10 mV | 4.0 µW | 10 mV |
| 90 | 0.01 mW | 18 mV | 0.01 mW | 17 mV |
| 95 | 0.03 mW | 32 mV | 0.04 mW | 31 mV |
| 100 | 0.10 mW | 57 mV | 0.13 mW | 55 mV |
| 105 | 0.32 mW | 0.10 V | 0.40 mW | 98 mV |
| Source | Price | Headroom, 530 Pro | Headroom, Q5 Pro | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 24.8 dB | 22.5 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 33.0 dB | 32.3 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 30.0 dB | 29.2 dB | 0.6 Ω | 1.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. 61 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 61 is the JadeAudio JA11, at $20. It leaves 24.8 dB of headroom on the 530 Pro and 22.5 dB on the Q5 Pro, its output impedance is 0.5 Ω against a one-eighth limit of 4.00 Ω and 3.00 Ω, and its noise figure puts the hiss floor 10 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 |
|---|---|---|---|
| 530 Pro | 20Hz–20kHz | not printed | not printed |
| Q5 Pro | 20Hz–20kHz | not printed | not printed |
EPZ prints the same thing for both the 530 Pro and the Q5 Pro: 20Hz–20kHz.
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: EPZ 530 Pro and EPZ Q5 Pro. Each figure on this page is labelled on those pages with where it came from, including the ones EPZ never published — what that maker publishes, counted.