Band: opinion spread · Dot: weighted average
Sources split, and in two different directions from one curve. A narrow peak near 8 kHz sits above a dip around 4 kHz, and listeners pick out different halves of it. Some hear sibilance and hissy cymbals from the peak; others hear a top end that lacks bite and definition and want it lifted. A small minority hear it as present and detailed just as it is. How tall the peak measures depends on the rig, the connection and the pads.
Measured
Three rigs read on raw data agree on the shape. Against an HD 600 on the same rig, oratory1990 (GRAS) shows the 3.5–5 kHz band 3–5 dB lower and the 7–9 kHz band 2–6 dB higher depending on the connection; RTINGS (B&K 5128) shows about −4 dB and +7.6 dB; GadgetryTech (KB006x) about −6 dB and +8 dB on the stock pads. RTINGS sums it up: "peaks and dips in the high-mids to mid-treble can cause instruments to sound either distant or aggressive, and sibilants either dull or piercing, depending on the pitch." TechPowerUp measures "a boosted treble with a substantial 8 kHz peak"; SoundGuys reads "The narrow 8kHz peak, and high-end roll-off beginning around 10kHz".
vs. listeners — The peak's height is the moving part. oratory1990's wired file shows the smallest 8 kHz rise and his Bluetooth files a larger one, while Les Numériques found the response unchanged across connections. Pads matter more: on GadgetryTech's rig a popular aftermarket pad cuts the 7–9 kHz peak from about +8 dB to +3 dB, and a deeper pad fills the 4 kHz dip and lifts everything above 5 kHz. RTINGS' summary label calls the treble "Slightly Underemphasized (-2 dB)" even though its raw curve carries the biggest peak of the three — a band average that nets the dip, the spike and the roll-off above 10 kHz against each other.
“if your ears are treble-sensitive, you could have an issue with the 8 kHz peak as it does introduce some sibilance to certain vocals (particularly female ones) and makes high-pitched sounds, such as cymbals or gunfire, somewhat piercing”
TechPowerUp
“Malheureusement, les aigus manquent de finesse et de détail, ce qui s’entend notamment sur les cymbales, mais aussi les cuivres.”
Les Numériques (Louis Paillat) — “unfortunately the treble lacks finesse and detail, audible on cymbals and brass”
“a beautifully-present treble with a lot of detail”
TechRadar (Michelle Rae Uy)
