Sennheiser HD 600 Review — The Benchmark That Time Forgot to Beat
Over two decades in production. Still recommended in almost every audiophile forum thread. The Sennheiser HD 600 isn’t a headphone that needs an introduction — but it does deserve a proper re-examination.
Overview & first impressions
Released in 1997 and barely changed since, the HD 600 is one of those rare products that achieved something close to perfection on the first attempt. Sennheiser has tweaked the internals and the cosmetics over the years, but the core design — open-back, 300Ω planar-inspired dynamic drivers, replaceable everything — has stayed remarkably consistent. And the reason is simple: it works.
Out of the box, the HD 600 makes a quietly confident first impression. No glossy packaging, no unnecessary accessories. Just the headphones, a cable, and a 6.35mm adapter. Sennheiser knows who this is for.
Design & build quality
The HD 600 won’t win any awards for visual drama. The blue-grey marbled finish is divisive — some find it elegant, others find it dated. Either way, it’s distinctive. What matters more is how the headphone is put together, and here Sennheiser has thought carefully about longevity.
The ear cups detach. The cable connects via proprietary two-pin connectors and can be replaced easily. The headband padding can be swapped. Even the grilles can be removed. This is a headphone designed to last decades, not years, and the modularity means that worn components don’t mean a dead product. For the price, the build feels appropriately solid without being heavy.
| Driver type | Open-back dynamic |
| Impedance | 300Ω |
| Frequency response | 12 – 38,500 Hz |
| Sensitivity | 97 dB SPL / 1 V RMS |
| Weight | 260g (without cable) |
| Cable length | 3m (straight, replaceable) |
Sound performance
Low end
The bass on the HD 600 is accurate rather than impressive — which is exactly the point. There’s no sub-bass boost, no added warmth. What you get is tight, controlled low-end reproduction that tells you exactly what’s in the recording. For electronic music or hip-hop listeners who want weight and rumble, this might initially disappoint. For jazz, classical, acoustic, and most rock, it’s revelatory. You hear the body of a double bass, not a coloured approximation of it.
Midrange
This is where the HD 600 earns its reputation. The midrange is exceptional — open, natural, and free from the kind of upper-mid hardness that plagues many headphones at this price. Vocals sit forward without being pushed. Guitars have texture. Piano has weight. It’s a presentation that rewards attentive listening, and after extended sessions, feels more like an open window than a headphone.
High end
Slightly rolled-off at the very top — some find this smooth and fatigue-free, others find it a little dark. A modest EQ lift around 10kHz opens things up without breaking the fundamental character. Straight out of the box, the treble is civilised and never harsh.
Key features
The HD 600 is an open-back headphone, which means the drivers are vented to the outside world. This creates a wider, more natural soundstage than closed-back designs — but it also means sound leaks in and out. These are not commuting headphones. They’re for focused listening at a desk, in a quiet room, or in a studio.
The 300Ω impedance requires a dedicated headphone amplifier to reach its potential. Plugging into a phone or laptop output will technically work, but you’ll leave most of the performance on the table. A modest desktop amp — something like the Schiit Magni or the JDS Labs Atom — is all that’s needed to unlock what the HD 600 can do.
Pros
- Exceptionally natural midrange
- Wide, open soundstage for a headphone
- Fully modular — replaceable cable, pads, headband
- Excellent long-term comfort
- Scales well with better amplification
- Proven 25-year track record
Cons
- Requires a headphone amp to perform properly
- Open-back design leaks sound — not for shared spaces
- Bass is accurate, not impactful — genre-dependent
- Dated aesthetics won’t appeal to everyone
- 3m cable is impractical for desktop use without a shorter aftermarket option
Who is this for?
The HD 600 is a headphone for people who listen seriously. It suits music producers checking mixes, vinyl collectors who want to hear exactly what’s in the groove, and anyone building a proper home listening setup. It rewards good recordings and reveals flaws in bad ones — which is a feature, not a bug.
It is not for gym sessions, commutes, gaming, or anyone who wants bass emphasis. For those use cases, there are better options at a similar price. But for critical listening at home, the HD 600 remains one of the finest choices available, regardless of what else has come along.
Final verdict
9.0 / 10
Outstanding — a lifetime purchase for the right listener
The Sennheiser HD 600 is a headphone that has survived long enough to become furniture — always present, always reliable, always slightly underrated by people chasing newer things. It has weaknesses, but they are knowable and manageable. Its strengths are rare. Buy it once, maintain it, and it will still be the best thing in your setup in fifteen years. Few products at any price can claim that.