Open-back over-ear · 50 Ω · Mid tier

Sennheiser HD 598

Sennheiser’s approachable open-back: warm, wide, and comfortable, the classic first step into real headphones.

Frequency responseRaw · L/R averaged
Head Acoustics HMS II.32005 to 2014Open backs read bass-light on this fixture.
-12-60+6+1220501002005001k2k5k10k20k
Normalized 0 dB @ 1 kHzOne unit, one seating
TypeOpen-back over-ear
Impedance50 Ωeasy to drive
Sensitivity~112 dB / V
Needs an amp?Noruns off a laptop
SignatureWarm, wide, easygoing

Our take

The HD 598 is the friendly on-ramp: an open, spacious sound with warm mids and a soft top that flatters most music. Not as resolving or neutral as the 600-series, but comfortable, easy to drive, and hard to dislike. A little presence EQ wakes it up.

Measured on a Head Acoustics HMS II.3 artificial head — raw response, left/right averaged, normalized to 0 dB at 1 kHz. From the Sonic Temple Archive(2008–2014, one unit per model). Honest limits: seating variance runs ±0.4 dB in the mids to ±3.9 dB above 12 kHz, and open headphones read bass-light on this fixture — don’t read fine treble detail as settled. How we measure →

New to this?How to read this graphWhat impedance meansDo you need an amp?

Common questions

Straight answers — the same ones our measurements support.

Does the HD 598 need an amp?

No. At 50 Ω and sensitive, it plays loud and clean off a laptop or phone.

HD 598 vs HD 600?

The 600 is more neutral and resolving; the 598 is warmer, wider, and easier to love casually. The 600 is the reference; the 598 is the easy listen.

If you like the HD 598

Close on the graph, or a deliberate step in one direction.

Warren Labs

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