The K712 PRO's impedance is 62Ω against the HD 490 PRO's 130Ω, its high-frequency extension 40 kHz against 36 kHz, and its low-frequency extension 10 Hz against 5 Hz. Both share sensitivity (105 dB).
Both turn up in the same documented systems.
The DT 700 PRO X's sensitivity is 100 dB against the HD 490 PRO's 105 dB, its impedance 48Ω against 130Ω, and its high-frequency extension 40 kHz against 36 kHz. Both share low-frequency extension (5 Hz).
Both turn up in the same documented systems.
The HD 620S's sensitivity is 110 dB against the HD 490 PRO's 105 dB, its impedance 150Ω against 130Ω, its low-frequency extension 6 Hz against 5 Hz, and its high-frequency extension 30 kHz against 36 kHz.
Both turn up in the same documented systems.
AKG K702
- Sensitivity
- 105 dB vs 105 dB
- Impedance
- 62Ω vs 130Ω