The Beyerdynamic DJ 300 PRO X is 48Ω at 115.0 dB (no reference unit printed); the Beyerdynamic T1 2nd Gen (600Ω) is 600Ω at 102.0 dB (no figure from the maker at all). This page covers what they ask of an amplifier, not how they sound.
The T1 2nd Gen (600Ω) needs 13.0 dB more than the DJ 300 PRO X to reach the same loudness — 0.63 mW against 0.03 mW.
| Specification | DJ 300 PRO X | T1 2nd Gen (600Ω) |
|---|---|---|
| Impedance | 48 Ω | 600 Ω |
| Sensitivity | 115.0 dB | 102.0 dB |
| Sensitivity (voltage) | 128.2 dB/V | 104.2 dB/V |
| Power for 100 dB | 0.03 mW | 0.63 mW |
| Voltage for 100 dB | 39 mV | 0.62 V |
| Current for 100 dB | 0.8 mA | 1.0 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 6.00 Ω | 75.00 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
One caution before reading the rows. Beyerdynamic DJ 300 PRO X 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. For Beyerdynamic T1 2nd Gen (600Ω) the maker publishes no sensitivity figure at all. The number in the table was collected when this database was first built and has never been traced to a manufacturer document, so treat every row below it as an estimate rather than a specification.
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.
33 sources are low enough in output impedance for the T1 2nd Gen (600Ω) under the one-eighth rule but not for the DJ 300 PRO X (Zoom AMS-22, Audient EVO 4, ART HeadAmp 4 Pro, 30 more).
19 sources stay below the audible-hiss threshold with the T1 2nd Gen (600Ω) but cross it with the DJ 300 PRO X (FiiO BTR11, FiiO K11 R2R, Lake People G103-S Mk II, 16 more).
280 of the 280 sources here reach 100 dB on both.
The T1 2nd Gen (600Ω) is more demanding than 91% of the 567 non-electrostatic models in this database; the DJ 300 PRO X than 6%.
| dB SPL | DJ 300 PRO X power | DJ 300 PRO X voltage | T1 2nd Gen (600Ω) power | T1 2nd Gen (600Ω) voltage |
|---|---|---|---|---|
| 80 | 0.3 µW | 4 mV | 6.3 µW | 62 mV |
| 85 | 1.0 µW | 7 mV | 0.02 mW | 0.11 V |
| 90 | 3.2 µW | 12 mV | 0.06 mW | 0.19 V |
| 95 | 0.01 mW | 22 mV | 0.20 mW | 0.35 V |
| 100 | 0.03 mW | 39 mV | 0.63 mW | 0.62 V |
| 105 | 0.10 mW | 69 mV | 2.0 mW | 1.09 V |
| Source | Price | Headroom, DJ 300 PRO X | Headroom, T1 2nd Gen (600Ω) | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 28.0 dB | 4.0 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 36.3 dB | 12.4 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 33.2 dB | 9.0 dB | 0.6 Ω | 1.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. 53 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 53 is the JadeAudio JA11, at $20. It leaves 28.0 dB of headroom on the DJ 300 PRO X and 4.0 dB on the T1 2nd Gen (600Ω), its output impedance is 0.5 Ω against a one-eighth limit of 6.00 Ω and 75.00 Ω, and its noise figure puts the hiss floor 7 dB and 31 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| DJ 300 PRO X | 5 - 35,000 Hz | not printed | not printed |
| T1 2nd Gen (600Ω) | 5 - 50,000 Hz | not printed | not printed |
Beyerdynamic prints 5 - 35,000 Hz for the DJ 300 PRO X and 5 - 50,000 Hz for the T1 2nd Gen (600Ω).
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 DJ 300 PRO X and Beyerdynamic T1 2nd Gen (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.