Band: opinion spread · Dot: weighted average
Sources split almost exactly in half. One side hears tight, fast, textured bass that extends further than most dynamic headphones and hits with more body than the graph suggests. The other side hears the sub-bass roll-off and a lack of slam, and reaches for EQ. The graphs support both: the TWO has more deep bass than an HD 600 but sits well below the Harman target and a flat planar, and it has less bass than the original HEDDphone.
Measured
oratory1990's GRAS file sits 7.9 dB under the Harman over-ear target at 20 Hz and 5.8 dB under at 50 Hz, yet 3.3 dB above his HD 600 at 20 Hz; VSG's and GadgetryTech's rigs put it 4–5 dB above their HD 6XX at 20 Hz. headphones.com's B&K 5128 shows the roll-off starting around 40–60 Hz and reaching about −6 dB at 20 Hz. Against the original HEDDphone on the same rig (three rigs), everything below 200 Hz is 2–4.7 dB lower. Tape Op measured less ringing and distortion than the original, especially below 100 Hz.
vs. listeners — Both camps are describing one curve. It reaches lower than most dynamic open-backs but not as low as a flat planar, and 'lean' and 'well extended' are the same response judged against different references. HEDD's co-founder acknowledged the split in public: some listeners 'would love more weight / body' down low.
“there’s an additional richness to the TWOs that somehow connects the bass to the low midrange more naturally, without ever sounding overblown or exaggerated”
Sound On Sound (Sam Inglis)
“You still will not find the HEDDphone Two imbued with huge amounts of sub-bass rumble.”
Headfonics (Marcus)
