The Sony MDR-Z7M2 is 56Ω at 98.0 dB/mW; the Sony WH-1000XM6 is 16Ω at 102.0 dB/mW. This page covers what they ask of an amplifier, not how they sound.
The MDR-Z7M2 needs 4.0 dB more than the WH-1000XM6 to reach the same loudness — 1.6 mW against 0.63 mW.
| Specification | MDR-Z7M2 | WH-1000XM6 |
|---|---|---|
| Impedance | 56 Ω | 16 Ω |
| Sensitivity | 98.0 dB/mW | 102.0 dB/mW |
| Sensitivity (voltage) | 110.5 dB/V | 120.0 dB/V |
| Power for 100 dB | 1.6 mW | 0.63 mW |
| Voltage for 100 dB | 0.30 V | 0.10 V |
| Current for 100 dB | 5.3 mA | 6.3 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 7.00 Ω | 2.00 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 MDR-Z7M2 under the one-eighth rule but not for the WH-1000XM6 (Shanling H5).
1 source stays below the audible-hiss threshold with the MDR-Z7M2 but crosses it with the WH-1000XM6 (Schiit Mjolnir 3).
280 of the 280 sources here reach 100 dB on both.
The MDR-Z7M2 is more demanding than 74% of the 567 non-electrostatic models in this database; the WH-1000XM6 than 33%.
| dB SPL | MDR-Z7M2 power | MDR-Z7M2 voltage | WH-1000XM6 power | WH-1000XM6 voltage |
|---|---|---|---|---|
| 80 | 0.02 mW | 30 mV | 6.3 µW | 10 mV |
| 85 | 0.05 mW | 53 mV | 0.02 mW | 18 mV |
| 90 | 0.16 mW | 94 mV | 0.06 mW | 32 mV |
| 95 | 0.50 mW | 0.17 V | 0.20 mW | 57 mV |
| 100 | 1.6 mW | 0.30 V | 0.63 mW | 0.10 V |
| 105 | 5.0 mW | 0.53 V | 2.0 mW | 0.18 V |
| Source | Price | Headroom, MDR-Z7M2 | Headroom, WH-1000XM6 | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 10.3 dB | 13.8 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 18.6 dB | 25.9 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR11 | $36 | 10.3 dB | 18.5 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 10.3 dB of headroom on the MDR-Z7M2 and 13.8 dB on the WH-1000XM6, its output impedance is 0.5 Ω against a one-eighth limit of 7.00 Ω and 2.00 Ω, and its noise figure puts the hiss floor 25 dB and 15 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| MDR-Z7M2 | 4 Hz - 100,000 Hz | not printed | not printed |
| WH-1000XM6 | 4 Hz - 40 000 Hz (IEC) | not printed | IEC |
Sony prints 4 Hz - 100,000 Hz for the MDR-Z7M2 and 4 Hz - 40 000 Hz (IEC) for the WH-1000XM6.
WH-1000XM6: Printed for the wired connection with the headset switched on; Sony gives no figure for the wireless mode.
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: Sony MDR-Z7M2 and Sony WH-1000XM6. Every figure on this page comes from what Sony published, or is derived from it — what that maker publishes, counted.