HyFa Sennheiser HD 600 Review: The Audiophile Standard
The Sennheiser HD 600 has been a reference headphone for mixing engineers, mastering studios, and audiophiles since 1997. Despite its age, it remains one of the most recommended headphones at any price. After years of ownership, here is why the HD 600 still matters.
Sennheiser HD 600 Review: The Audiophile Standard
Design and Build
The HD 600 uses an open-back circumaural design with a speckled dark-blue finish on the ear cups. The headband is padded with a replaceable cushion, and the oval velour ear pads create a comfortable seal without excessive clamping pressure.
At 260 grams without the cable, the HD 600 is light enough for multi-hour listening sessions. Every component is replaceable, from the ear pads to the headband padding to the cable itself. This repairability is rare and keeps the headphone functional for decades.
Build Quality
The plastic construction feels less premium than metal-bodied competitors, but it serves a purpose. Plastic reduces weight and resonance. The modular design means you are not buying a disposable product. Replacement parts are widely available from Sennheiser and third-party suppliers.
Sound Signature
The HD 600 has a neutral sound signature with a slight warmth in the lower midrange. This is not a headphone that flatters poor recordings or boosts bass for excitement. It reveals what is actually in the music.
Bass: Extends to about 40 Hz with a gentle roll-off below that. Bass is present, accurate, and fast but never emphasized. If you want thumping bass, look elsewhere.
Midrange: This is where the HD 600 earns its reputation. Vocals, guitars, and pianos sound strikingly natural. The slight warmth around 200-400 Hz gives body to male voices and acoustic instruments without masking detail.
Treble: Smooth and detailed up to about 10 kHz with a subtle dip around 6 kHz that reduces fatigue during long sessions. The treble avoids the harshness common in many headphones at this price point.
| Specification | Value |
|---|---|
| Type | Open-back, over-ear |
| Driver | Dynamic, 42mm |
| Impedance | 300 ohms |
| Sensitivity | 97 dB SPL/mW |
| Frequency Response | 12 Hz - 40,500 Hz |
| Weight | 260g (without cable) |
| Cable | Detachable, 3m with 6.3mm plug |
Amplification Requirements
With 300-ohm impedance and 97 dB sensitivity, the HD 600 needs a dedicated amplifier. A phone or laptop headphone jack will not drive these properly. Volume will be low, bass will be thin, and dynamics will be flat.
A desktop amp like the Schiit Magni or JDS Labs Atom provides enough power to unlock the HD 600’s full potential. Budget around $100-200 for a competent amp. For a complete guide on pairing, see our [INTERNAL: dac-amp-setup-guide-beginners].
Soundstage and Imaging
Open-back design gives the HD 600 a natural, speaker-like presentation. Sound does not feel trapped inside your head. The soundstage is intimate rather than expansive, which works well for vocal-focused music and small ensemble recordings.
Imaging is precise. Instruments occupy distinct positions in the stereo field, making the HD 600 an excellent tool for critical listening and mixing.
Comfort
Velour ear pads are breathable and soft. The light clamping force distributes pressure evenly. During summer months, the open-back design allows airflow that reduces heat buildup.
The only comfort issue is the clamping force on new units, which can feel tight for the first few weeks. The clamp loosens with use, or you can gently stretch the headband over a stack of books overnight.
HD 600 vs HD 650 vs HD 660S2
| Feature | HD 600 | HD 650 | HD 660S2 |
|---|---|---|---|
| Impedance | 300 ohms | 300 ohms | 150 ohms |
| Sound Character | Neutral | Warm | Detailed-warm |
| Bass Emphasis | Flat | Slight boost | Moderate |
| Treble | Smooth | Rolled off | Extended |
| Price | ~$300 | ~$350 | ~$500 |
The HD 600 is the most neutral of the three. The HD 650 adds warmth and bass weight that some listeners prefer for relaxed listening. The HD 660S2 is easier to drive and has a more modern tuning. For most listeners starting their audiophile journey, the HD 600 remains the best value.
Who Should Buy the HD 600
The Sennheiser HD 600 is built for people who want accuracy. If you care about hearing music as it was recorded rather than as a manufacturer thinks it should sound, this is the headphone.
Buy if: You have or plan to buy a headphone amp, prefer neutral sound, and value long-term build quality.
Skip if: You need wireless connectivity, want bass-heavy sound, or listen primarily in noisy environments where an open-back design leaks too much sound.
Key Takeaways
- Neutral, natural sound signature that has remained a studio reference for over 25 years
- 300-ohm impedance means a dedicated amplifier is essential
- Fully modular and repairable design extends the lifespan well beyond typical headphones
- Open-back design provides excellent soundstage but zero noise isolation
Next Steps
Pair the HD 600 with a quality source. Our [INTERNAL: dac-amp-setup-guide-beginners] walks through affordable DAC/amp combos. If you want to compare the HD 600 against a planar magnetic alternative, read our [INTERNAL: hifiman-sundara-review] for a head-to-head perspective.