Gr8Desire
100+ Head-Fier
- Joined
- Mar 13, 2015
- Posts
- 216
- Likes
- 66
Here's a simple question: Why does low impedance not mean higher efficiency?
I have two headphones:
1. Hifiman HE-560 with measured DC impedance of 42 ohms.
2. Sennheiser HD800 with measured DC impedance of 350 ohms.
Using my Oppo HA-1 SS amp with balanced and unbalanced outputs, the HD800 always requires a lower volume setting versus the HE-560 to obtain the same perceived sound level.
Other owners of both headphones have noted the same thing.
Why would would a HP with lower impedance require more power to drive it to the same level?
I have two headphones:
1. Hifiman HE-560 with measured DC impedance of 42 ohms.
2. Sennheiser HD800 with measured DC impedance of 350 ohms.
Using my Oppo HA-1 SS amp with balanced and unbalanced outputs, the HD800 always requires a lower volume setting versus the HE-560 to obtain the same perceived sound level.
Other owners of both headphones have noted the same thing.
Why would would a HP with lower impedance require more power to drive it to the same level?