A headphone target curve descends gradually with frequency and boosts bass.

Evidence

Figure 15.23(b) shows the final choice of their reference target curve. It is based on the 1/6-octave-smoothed B&K 5128 DF Target with a −0.6 dB per octave downward tilt and a 4.3 dB bass shelf boost 105 Hz (Q = 0.707). It approximates the Harman (5128 modified) target and the PIR curve of a well-designed loudspeaker like the Revel F208 (see Figure 15. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1845

Categorization

• XREF: Connects to the Harman target curve concept and the PIR (predicted in-room) response matching a well-designed loudspeaker, a theme running through earlier chapters.