Superlux HD681 — frequency response Measured: Warm
This is the actual measured response of the Superlux HD681 (source: ASH-IR HpCF). Compare it against the Harman target, listen to the tuning on test signals below, then check prices (from ₹4,500 at 1 store).
Signature: Warm
Bass vs mids: +4.3 dB
Treble vs mids: +3.9 dB
Tuning vs Harman: 1.7 dB avg dev (close to target)
Measured by: ASH-IR HpCF
On file since 2026-10-05
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.