Sennheiser HD 660 S - Dynamic Open-Back Stereo Headphone — frequency response Measured: Balanced
This is the actual measured response of the Sennheiser HD 660 S - Dynamic Open-Back Stereo Headphone by Sennheiser (source: AutoEq · HypetheSonics). Compare it against the Harman target, listen to the tuning on test signals below, then check prices (from ₹39,990 at 1 store).
Signature: Balanced
Bass vs mids: -5.3 dB
Treble vs mids: +3.4 dB
Tuning vs Harman: 2.8 dB avg dev (moderately tuned)
Measured by: AutoEq · HypetheSonics
On file since 2026-09-10
Wearing your own earphones or headphones? Pick them here and the player pre-corrects for their sound, so the demo plays the target tuning itself - not both mixed together.
Same signal, two ways: hear it without this tuning, then with it -
Sounds like
Curve-shape similarity from the same measurements - open any two in the compare tool to overlay and hear them side by side.