Sennheiser HD 800S vs Audeze MM-500 Review

Two of the most serious headphones you can buy at their respective price points — one a legendary open-back dynamic from Sennheiser, the other a planar magnetic workhorse from Audeze. The HD 800S and MM-500 represent genuinely different philosophies about what a high-end headphone should be, and understanding that difference is the key to making the right call for your setup.

Sennheiser HD 800S

The Case For It

The HD 800S has a near-mythical reputation in the audiophile world, and after spending real time with it, the hype mostly holds up. Its defining quality is comfort — it is, by many accounts, one of the most wearable headphones ever made. A Reddit user who recently came to it after years with Sundara and various AKGs put it perfectly: the HD 800S makes you forget it's on your head. You stand up, walk across the room, and suddenly remember there's a flagship headphone sitting on your skull. That's rare.

The soundstage is genuinely special. Instruments "float" in space — that's not marketing copy, that's a description reviewers reach for independently. There's a three-dimensional, almost dreamlike quality to how the HD 800S presents music. Each element has room to breathe, to move, to exist at a specific point in a wide arc around your head. For classical, jazz, and orchestral music in particular, this is hard to beat.

Durability is another card the HD 800S plays with confidence. Unlike some competitors known for quality control issues, Sennheiser's build has proven itself over years of ownership. This is a headphone you can expect to still be using a decade from now.

Where It Falls Short

The treble can be divisive — there's a well-documented peak in the upper frequencies that some listeners find fatiguing over long sessions. EQ helps significantly (the Chord Mojo 2 is a fan-favorite pairing for taming this), but out of the box, brighter recordings can feel sharp. Bass slam is also not its strong suit. Compared to planar magnetics like the MM-500, the HD 800S sounds polite and smoothed-out down low. If you listen to music where impact and body matter — electronic, hip-hop, rock — this can feel like a notable omission.

It also demands a good source and amplifier. Pair it poorly and its shortcomings are amplified rather than masked.

Audeze MM-500

The Case For It

The MM-500 is Audeze's mixing and mastering-focused planar magnetic, and it shows. Where the HD 800S floats, the MM-500 grounds. Instruments are locked into defined positions in the soundstage — precise, stable, and purposeful. For professional work or for listeners who want to hear exactly where everything sits in a mix, this is an asset rather than a limitation.

Bass and slam are where the MM-500 really flexes. The planar driver delivers low-end impact that dynamic headphones at this price simply can't match. Music feels more full-bodied and engaging — one user described it as sounding "really full" compared to the HD 800S's more ethereal presentation. If you want headphones that feel alive with modern music, the MM-500 has a visceral quality the HD 800S can't replicate.

Detail retrieval is excellent, and the tuning is studio-accurate — flatter and more analytical than the HD 800S, which some users will love and others will find clinical.

Where It Falls Short

Comfort is the obvious trade-off. Planar magnetic drivers require larger, heavier housings, and the MM-500 is noticeably heavier on the head than the HD 800S. For marathon listening sessions — the kind of use these headphones are built for — that weight adds up. Earpads can also run warm over time.

The sound presentation, while accurate, won't suit everyone. The "fixed in space" quality that professionals value can feel less immersive for pure music listening compared to the HD 800S's wide, floating stage. And at its price point, it's competing with some fierce alternatives — including open-back planars that offer more soundstage width.

Head-to-Head Comparison

Category	Sennheiser HD 800S	Audeze MM-500
Driver Type	Dynamic (56mm ring radiator)	Planar Magnetic
Soundstage	Exceptional — wide, floating, 3D	Good — precise, instrument placement locked
Bass Impact	Light, polite	Strong slam, full-bodied
Treble	Extended, can be sharp (EQ recommended)	Detailed, studio-accurate
Comfort	Class-leading — featherlight	Good, but heavier and runs warm
Build / Longevity	Excellent, proven over years	Solid professional build
Best Use Case	Audiophile listening, classical, jazz	Studio work, modern genres, monitoring
Amp Requirements	High — needs a good source	High — planars are power hungry

Verdict: Different Winners for Different Listeners

This isn't a competition with a clean winner — it's a fork in the road. Buy the HD 800S if you listen to acoustic, classical, jazz, or anything where imaging, staging, and long-session comfort are your priorities. It's the more romantic, transportive headphone — one that rewards patient listening with a genuinely unique sonic experience. Its longevity is also a real advantage; this is a headphone you invest in once.

Buy the MM-500 if you work in audio professionally, primarily listen to modern music with real bass energy, or want studio-level analytical accuracy. The planar driver's grunt and precision are tools the HD 800S simply doesn't have. Just be prepared for the extra weight and budget for a solid amplifier.

One practical note worth flagging: if you're considering the HD 800S, experiment with EQ — particularly a slight dip around 6kHz. The hardware EQ on something like the Chord Mojo 2 is frequently recommended by users as an ideal pairing that addresses the treble peak without sacrificing the headphone's magic.

Frequently Asked Questions

Q: Is the Sennheiser HD 800S worth the price in 2024?

A: For audiophile listening — especially classical, jazz, and acoustic music — yes. The soundstage and comfort are genuinely class-leading, and the build quality means it should last many years. Treble-sensitive listeners should plan to EQ or choose their amp carefully.

Q: Is the Audeze MM-500 good for casual music listening or just studio use?

A: It's designed for studio and monitoring work, but its strong bass impact and detailed presentation make it satisfying for casual listening too — particularly for modern genres. It's less "fun" than consumer-tuned headphones but genuinely engaging.

Q: Which has better comfort, the HD 800S or MM-500?

A: The HD 800S is the clear winner here. Multiple users describe it as feeling nearly weightless during long sessions. The MM-500, like most planar magnetics, is heavier and can cause ear warmth over extended wear.

Q: Do both headphones need an external amp?

A: Yes — neither should be run directly from a laptop or phone. The HD 800S in particular is sensitive to source quality and will reveal weaknesses in your chain. A dedicated DAC/amp is strongly recommended for both.

Q: How does the HD 800S compare to the Hifiman Arya Organic at a lower price?

A: Community members who've compared both note the Arya Organic offers more bass slam and a similarly wide soundstage at a lower price, making it better value for most listeners. The HD 800S wins on comfort and long-term reliability — Hifiman's quality control has historically been inconsistent.

— Tech Lead Editor, CPrice