回覆 325# cocteau
You had read good doc. The writer knows electronic circuit design.
1.
If a headphone has a low impedance and a high sensitivity rating, it will be very easy to drive. If a headphone has a high impedance rating and a high sensitivity rating, it should be easy to drive. If a headphone has a high impedance and a low sensitivity rating, it will be hard to drive. If a headphone has a low sensitivity rating and a low impedance rating, it will be very hard to drive.
Correct (in terms of amplifier circuit design). It is easier to raise the voltage (for high impedance load) than current (for low impedance load).
2.
Usually expensive headphones have a more stable impedance curve across the audio frequency range. But it is not always true. Beyer T1 has a very fluctuating impedance curve but it is very good headphones. Once you fully drive it, it sounds perfectly. |