Band: opinion spread · Dot: weighted average
Sources split three ways. The largest group hears a distinctly coloured house tuning — W-, U- or V-shaped depending on who is describing it — that sounds 'wrong' next to neutral headphones but works as a whole once the ear adjusts. A second group, including a reviewer who measured it, finds the timbre unnatural enough that EQ is needed. A third, mostly press reviewers, describes it as clear, natural or even flat — a reading no measurement supports.
Measured
Four rigs agree on a W shape. On Kuulokenurkka's IEC711/KB501X rig, against an HD 600 on the same rig (levelled at 500 Hz): about +9 to +10 dB from 50 to 200 Hz, a 3–4 dB dip around 700 Hz–1 kHz, +5 to +8 dB at 2–3 kHz, a notch near 4 kHz and peaks near 7 and 12 kHz. Pragmatic Audio (KB501X) and GREQ (miniDSP EARS) show the same scoop between roughly 500 Hz and 2 kHz with a 2–4 kHz boost; ON-mag's bench shows bass and treble forward at the expense of the midrange.
vs. listeners — The 'flat / natural' camp (What Hi-Fi, AreaDVD, Audio46, Major HiFi, PHILE WEB) contradicts every graph: none of the four rigs shows anything close to flat. Pragmatic Audio and GREQ, who both measured it, read the shape as deliberate — Yamaha told GREQ the goal was to sound as spacious and wide as possible.
“After getting used to them, however, the colorations no longer feel like outright flaws, but rather deliberate choices by which the manufacturer has achieved its sound quality goals.”
Kuulokenurkka (Sword of Damocles)
“I also feel that at this price, EQ should not be required.”
Head-Fi review (GREQ)
“Fast, clear, natural sound”
What Hi-Fi? (Becky Roberts)
