The Beyerdynamic DT 1770 PRO is 250Ω at 102.0 dB/mW; the Beyerdynamic DT 880 Edition (600Ω) is 600Ω at 96.0 dB (no reference unit printed). This page covers what they ask of an amplifier, not how they sound.
The DT 880 Edition (600Ω) needs 6.0 dB more than the DT 1770 PRO to reach the same loudness — 2.5 mW against 0.63 mW.
| Specification | DT 1770 PRO | DT 880 Edition (600Ω) |
|---|---|---|
| Impedance | 250 Ω | 600 Ω |
| Sensitivity | 102.0 dB/mW | 96.0 dB |
| Sensitivity (voltage) | 108.0 dB/V | 98.2 dB/V |
| Power for 100 dB | 0.63 mW | 2.5 mW |
| Voltage for 100 dB | 0.40 V | 1.23 V |
| Current for 100 dB | 1.6 mA | 2.0 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 31.25 Ω | 75.00 Ω |
| Sources that reach 100 dB out of 280 | 280 | 266 |
One caution before reading the rows. Beyerdynamic DT 880 Edition (600Ω) 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.
14 of the 280 sources have the power for the DT 1770 PRO but not for the DT 880 Edition (600Ω) — Apple USB-C dongle (US), Apple USB-C dongle (EU), JadeAudio JA11, 11 more.
15 sources are low enough in output impedance for the DT 880 Edition (600Ω) under the one-eighth rule but not for the DT 1770 PRO (Audient EVO 4, ART HeadAmp 4 Pro, Focusrite Scarlett Solo 4th gen, 12 more).
266 of the 280 sources here reach 100 dB on both.
The DT 880 Edition (600Ω) is more demanding than 98% of the 567 non-electrostatic models in this database; the DT 1770 PRO than 82%.
| dB SPL | DT 1770 PRO power | DT 1770 PRO voltage | DT 880 Edition (600Ω) power | DT 880 Edition (600Ω) voltage |
|---|---|---|---|---|
| 80 | 6.3 µW | 40 mV | 0.03 mW | 0.12 V |
| 85 | 0.02 mW | 71 mV | 0.08 mW | 0.22 V |
| 90 | 0.06 mW | 0.13 V | 0.25 mW | 0.39 V |
| 95 | 0.20 mW | 0.22 V | 0.79 mW | 0.69 V |
| 100 | 0.63 mW | 0.40 V | 2.5 mW | 1.23 V |
| 105 | 2.0 mW | 0.71 V | 7.9 mW | 2.18 V |
| Source | Price | Headroom, DT 1770 PRO | Headroom, DT 880 Edition (600Ω) | Output impedance | Noise |
|---|---|---|---|---|---|
| FiiO KA11 | $29 | 16.2 dB | 6.4 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 12.8 dB | 3.0 dB | 0.6 Ω | 1.0 µV |
| iBasso DC03 Pro | $69 | 13.0 dB | 3.2 dB | 0.12 Ω | 0.9 µV |
Of the 280 sources here, 266 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 FiiO KA11, at $29. It leaves 16.2 dB of headroom on the DT 1770 PRO and 6.4 dB on the DT 880 Edition (600Ω), its output impedance is 0.7 Ω against a one-eighth limit of 31.25 Ω and 75.00 Ω, and its noise figure puts the hiss floor 27 dB and 37 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| DT 1770 PRO | 5-40,000Hz | not printed | not printed |
| DT 880 Edition (600Ω) | 5 - 35.000 Hz | not printed | not printed |
Beyerdynamic prints 5-40,000Hz for the DT 1770 PRO and 5 - 35.000 Hz for the DT 880 Edition (600Ω).
DT 880 Edition (600Ω): Beyerdynamic prints one range for the whole DT 880 Edition page, the same figure for every impedance version.
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: Beyerdynamic DT 1770 PRO and Beyerdynamic DT 880 Edition (600Ω). Each figure on this page is labelled on those pages with where it came from, including the ones Beyerdynamic never published — what that maker publishes, counted.