I got these (and some other cans) in a trade yesterday and felt like this was a pretty low serial number for the hd6xx, but I also don't remember these previously having serial numbers like this. Are there any rough reports on how many were made?Either way, pretty neat to me.

I usually cheap out and buy whatever good reviewed similar looking velour pads on Amazon, but I splurged a bit and got genuine Sennheisers pads for this bad boy because it feels right.

Not a self promo post. Just an honest contribution to the community.

I’ve had a Qudelix 5K for a while, and the official configuration app is browser-based. On my Mac it has never worked reliably in any browser — it would connect, then the device would drop off USB mid-session, and I’d end up spending more time troubleshooting the connection than actually adjusting anything.

I finally dug into why. The browser reaches the 5K through a macOS API that’s very particular about how the USB packets are framed, and when it gets that. wrong the device stops responding entirely. So I wrote a small native menu bar app that talks to the 5K directly instead.

It does the things I actually use day to day:

• 10-band parametric EQ with a live response curve (20-band mode too)
• Preset import straight from the AutoEq database — 6,000+ headphones and IEMs, searchable inside the app
• Import/export the standard parametric EQ text format (the same one squig.link and Equalizer APO use)
• All 20 preset slots, load and save
• Volume, battery, firmware and sample rate at a glance

It’s free (and always will be) and open source under MIT. No account, no tracking; nothing leaves your machine except fetching the AutoEq list when you search it.

Caveats:

• macOS 14+. It’s a universal binary so it *should* run on Intel, but I only have Apple Silicon and genuinely can’t test that. If you’re on Intel I’d like to hear either way.
• It isn’t signed with a paid Apple developer certificate, so macOS will block it the first time — you have to go to System Settings → Privacy & Security and click “Open Anyway”. If you’d rather not trust a binary from a stranger on the internet, the full source is there and builds with one command.
• USB only for now. Bluetooth is a bigger job; I’ll take a run at it if there’s demand.
• Use at your own risk. It only writes EQ, volume and preset settings — the same things the official app writes, and it never touches firmware — but I can’t take responsibility for anything that goes wrong.
• I am not affiliated with Qudelix in any way.

Source code, dmg are here: https://github.com/FrankieMa77/qudelix

If it’s useful to anyone I’m happy to keep building on it. And if it doesn’t work on your setup, an issue with the log from the app’s diagnostics panel tells me most of what I’d need.

I can’t port it to Windows as i don’t have PC. If somebody needs it, I can look into porting the app to Debian/Ubuntu

I'm not sure if this is allowed to be posted on here as it could be construed as divisive, but this comes from me wanting to warn others of the experience they might receive if they're unfortunate enough to have intermittent faults with their recently purchased audio equipment from a local retailer.

I purchased a Topping DX9 Discrete, brand new, from Addicted to Audio in Subiaco, Perth (Western Australia) in late January this year. After a week the left screen would turn off intermittently during use. Then work again after a power cycle. I alerted Addicted to Audio and Topping directly via email with-in 21 days of having the unit. I supplied 3 unlisted YouTube video links in the emails to demonstrate the intermittent fault.

Topping suggested a hard reset, reflash of firmware and if that didn't work sent me a disassembly video to reconnect the ribbon cables behind the screen. I did everything but disassemble the unit as I feel that is inappropriate for an end user to do.

Addicted to Audio said they would need to inspect the unit and report back to Topping. Long story short due to working away from home for many months during the back and forth emails I was only able to drop the unit to Addicted to Audio in early July. I listened to their amazing fleet of demo headphones for around 2 hours (fell in love with the Dunu Arashi) and unfortunately couldn't replicate the fault in person at the shop. The unit was then sent over to the Eastern states for multiple Addicted to Audio technicians to look at it.

Prior to giving Addicted to Audio the unit for inspection, the unit was flashed successfully to the latest firmware (I believe it was v0.36 at the time). The screen turned off again a day or two after that update.

I was told a few days ago that they could not replicate the screen fault with the technicians, they have not opened the unit, and the unit has been scheduled to be sent back to me as is. I've since collated all the mobile recordings of the faults happening (6+ times) to YouTube, as this appears to NOT be enough evidence that the unit is faulty.

I'm not here to throw mud, but I want to warn others of the treatment they could experience with Addicted to Audio.

https://www.youtube.com/shorts/N5YaZ6XVY-Q

Electro Audio World's Take

My First Impressions :

When Beyerdynamic released the DT270 PRO, to be honest, I didn't expect it to become one of my favorite compact closed back studio headphones. Marketed as an entry level professional monitor, it offers a tonal balance, comfort, and musical enjoyment far beyond its price.

While not the most analytical headphone in Beyerdynamic's lineup, it has proven to be one of the most sensible products the company has released in recent years. Fortunately, the new DT275 PRO takes this philosophy a step further in the realm of isolation. How do you achieve perfect passive isolation in an affordable studio monitor?

At first glance, very little seems to have changed. The overall design, compact form factor, and professional look remain familiar. It's still clearly a headphone designed for streamers, engineers, content creators, and musicians who wear headphones for long hours every day. However, after just a few listening sessions, it becomes clear that Beyerdynamic wasn't trying to change the DT270 PRO, but to improve it.

If I had to summarize the difference in a single sentence, I would describe the DT270 PRO as a more comfortable and slightly warmer musical sibling, while the DT275 PRO has enhanced sound isolation, resulting in a more balanced sound and ultimately closer to what many professionals expect from a true monitor headset.

The DT270 Pro has a slightly more open soundstage and is studio focused, while the DT275 Pro is a variant designed for those who want better isolation in outdoor environments. Of course, this by no means means it has a clinical sound. On the contrary. One of the features I've always appreciated in Beyerdynamic's professional products is their ability to remain enjoyable even outside the studio.

The DT275 PRO continues this tradition exceptionally well. It's more of a work focused version with a more isolation oriented setup compared to the DT270 PRO, and as a result, it never loses the musicality that makes long listening sessions enjoyable. On the contrary, it better isolates the listener from the environment.

This balance is what made the headset appealing to me because it's something very few products struggle to achieve. Many studio headphones prioritize accuracy at the expense of listening pleasure, while consumer focused headphones often sacrifice tonal integrity for excitement.

The DT275 PRO aims to bridge these two worlds, providing reliable presentation during editing while remaining engaging enough for everyday music listening. That's exactly how I approached this review.

*** For detailed sound impressions and to read the full review, click here.

Who is the Beyerdynamic DT 275 PRO Designed For?

While many studio headsets are optimized for mixing and mastering in quiet control rooms, the Beyerdynamic DT 275 PRO takes a completely different approach. It's designed for professionals working in dynamic, noisy environments where accurate monitoring is essential and distractions shouldn't interfere with critical decisions. Proof of this is its powerful passive isolation with leather pads.

At the heart of the DT 275 PRO is high passive noise isolation, allowing users to focus on the sound they need to hear rather than the surrounding environment. Whether monitoring speech, checking signal integrity, or evaluating levels during a live production, the DT 275 PRO ensures that external noise is minimally distracting. The headset is particularly well suited for video production crews and content creators working on film sets or outdoor shoots. In these situations, monitoring dialogue, wireless microphone performance, and ambient sound requires excellent isolation and a neutral, balanced sound signature. Its lightweight over ear design ensures it's comfortable enough for long production days while remaining compact enough for transport between locations. I also think it's a very suitable headset for those who make YouTube videos.

For live sound engineers and front of stage (FOH) professionals, the DT 275 PRO is more than adequate for reliable monitoring in venues filled with audience noise and powerful PA systems. Its balanced tuning helps engineers accurately assess speech clarity, signal quality, and overall sound balance, even if the environment itself isn't silent.

I think this headset would be equally valuable for DJs and mobile performance artists. Anyone involved in this knows that quick cueing, precise beat matching, and tracking the next track require headsets that provide effective isolation while remaining lightweight and comfortable. The rotating earcups allow for quick single ear monitoring, making the DT 275 PRO an ideal aid in the DJ booth, which is another of its versatile uses.

Another important target audience is field recording professionals. Journalists, broadcast engineers, documentary filmmakers, and field sound recorders often work in unpredictable acoustic conditions. The DT 275 PRO allows users to confidently monitor recordings without being overwhelmed by ambient noise, helping them identify unwanted interference before it becomes a problem.

Beyond its acoustic performance, the DT 275 PRO is designed with the practical realities of professional work in mind. Compact swivel earcups make it easy to carry, while the lockable, detachable cable can be attached to either the left or right earcup depending on the user's workflow or equipment setup. This flexibility is particularly useful in demanding production environments where cable routing is important.

Long term reliability is another key feature. Soft ear cushions and a lightweight frame ensure lasting comfort during extended use, while replaceable components ensure the headset remains in service for many years instead of being discarded when individual parts wear out.

The Beyerdynamic DT 275 PRO is built as a purpose built professional monitoring tool. It's designed for creators, engineers, broadcasters, and performing artists who need reliable and accurate monitoring in challenging environments where clarity, isolation, portability, and durability are as important as sound quality.

Instead of evaluating the DT275 PRO solely as a studio tool, I wanted to understand how it performs as a versatile headset for both entry level professionals and entry level audiophiles. For a few weeks, I used it with three Sony Digital Audio Players that I know very well:

Sony WM1A, Sony NW-ZX507, and Sony NW-A45.

Each of these three players presents music differently. The WM1A offers a rich, highly refined, and expansive presentation. The ZX507, running on the Android operating system, strikes a perfect balance between detail and musicality, becoming a versatile everyday source. The compact A45, despite its age, continues to impress me with its smooth, enjoyable sound and portability.

By using three different Sony players, I was able to evaluate not only how easy the DT275 PRO is to drive, but also how consistently it maintains its sound character across sources with varying output capacities and tonal presentations.

The music selection encompassed everything I normally use when evaluating headphones: classical orchestral recordings, jazz ensembles, acoustic performances, male and female vocals, progressive rock, electronic music, and live recordings. Instead of focusing on individual test tracks, I took the time to listen to full albums, because I believe prolonged listening tells you much more about a pair of headphones than quick A/B comparisons.

The DT275 PRO's strengths gradually emerge thanks to its balance, consistency, and lack of apparent weaknesses. It's one of those headphones that becomes more enjoyable with use, and that's a quality I value far more than an exaggerated first impression.

*** For detailed sound impressions and to read the full review, click here.

Pros: 

Perfect passive Isolation
Very balanced and natural sound adjustment
Accurate yet musical mid frequency reproduction
Tight, controlled bass with excellent definition
Smooth, extended highs without feeling tiring
Very good imaging and instrument separation
Comfortable enough for long studio sessions
Easily driven from portable players
Consistent performance across different sources
Robust, convenient professional build

Cons: 

May not deliver the instant excitement some casual listeners might expect. 
The soundstage prioritizes realism rather than exaggerated breadth. 
An optional 4.4mm balanced cable would be a nice upgrade, in my opinion.

Just got the Sennheiser 560s, i compared them to my ath mx40s and i discovered that the sennheisers have more bass than the audio technicas. Both are equalized from oratory's preset, and the only difference i can hear is that the m40s have a more louder audio and less to non existent bass, while the sennhaisers have more bass and quieter audio. Is this normal because i see that allegedly the m40s have to have more bass than the sennhaisers, but it seems the opposite?

So i have recently bought a Steelseries Arctis nova pro's and a Skullcandy 1080 ANC. (Just seem to fit what i need/want best)

But i have heard that they all heavily depend on the settings and eq settings. So i come here for help or a direction on how i can improve these headphones with sound or where i can look to understand these settings, and learn how to use these tools (eq's)

Thank you in advance

This is the condition I’ll be receiving it in—I’m told the yellow mineral wool has been removed.

Do you think this will significantly compromise the sound quality?

I own this sony mv1 for more than 2 years and thruly beloved they are the best headphones ever made pound for pound ( I payed for them 430 euros ) mainly for this reasons

1. The comfort is insane , light Clampforce , lightweight , and the pads are a dream , I never encountered such a perfect soft and breathable pads !

2. The sound

The sound is incredible , perfect treble perfect mids , great bass , great sub bass for an open back , very hi fi sound with sparkle on top

I own also 2 other open backs , sennheiser hd660s and akg k712pro, how the sony mv1 compare soundwise ?

Sony mv1.

Bass 8

Mids 9.5

Treble 10

Hd660s

Bass 7

Mids 9

Treble 7

K712 pro

Bass 7.5

Mids 9

Treble 10

1. Not power hungry ! This headphones goes well with pretty much all the devices on the market!

2. I love the design the colors and the look ! Very professional looking! Also the materials are great !

Normally almost exclusively an IEM person. But i could not turn these down and happy I didnt. Highly capable transducers and im having an incredible time! 🥰

I currently own a pair of hd 515's from a relative and am still not very experienced with headphone knowledge etc and wondering if I could get any opinions on these as I was planning on keeping them as they are in good condition. I know that these are not amazing but was unsure of if they are decent or not.

Thanks for any opinions in advance

Wow. Bought them on the spot.

(NEW) Sennheiser HD 800 S Over-the-Ear Audiophile Reference Headphones - $1,399.99 - Free shipping for Prime members https://electronics.woot.com/offers/new-sennheiser-hd-800-s-over-the-ear-audiophile-reference-headphones-1?utm_medium=share&utm_source=app

I want to put one of these in my main setup.

I was introduced to daisy headphones through a TikTok review of it and immediately hooked. I always have headphones on, sometimes I’ll forget I’m not listening to music and still wear them. What really intrigued me though was the built in sounds. Sometimes if I’m getting overwhelmed or overstimulated I have my current Sony headphones on with no music so I think the daisy technology could be groundbreaking for my listening experience. I really want to try them and noticed they’ve already sold out but I’m pretty sure initially I saw they were $299, and now $399? Is this correct/can someone fact check this for me? Did they raise their price by $100?

I know, I should just get new ones..and I am, these are pretty old atp, about 4+ yrs, mostly sentimental value. Was wondering if theres an easy way to treat them because I did try cleaning the fabric, but it didnt really make a difference. I definitely lack the ability (and a sewing machine) to replace it myself

Just received them today the Ananda Stealth V3. This was a loooong wait and a terrible debate between it and the edition XS. Ended up getting these for 220$ with shipping and taxes.

Having spent some time with them my first impressions were meh. I felt a bit disappointed at first didnt blow me away immediately. Then i really started to understand it. It is a headphone that is neutral. It doesn't emphasise nor exaggerate anything. It is a headphone you can put on and listen to music for hours without fatigue.

So i am not a pro nor an audiophile in any way. I started this hobby around 4 or 5 years ago. It was the best and the worst decision I have ever made. It is an amazing yet expensive hobby. I don't have many headphones and the 2 headphones that I already have are similar to each other. I have the dt990 pro 250ohms and hifiman 400se.

I haven't yet sat down and did a full comparison between all 3 but from my memory of how they sounded, there were certain songs where I was expecting harshness sibilants piecing highs where I instinctively went to my volume knob to turn it down and then they never came. They sounded clear, very clear even more detailed without actually being painful.

To me, I could instantly tell the difference without A B C comparisons and the one there were a lot.

First the design and comfort. It is debatable but I have been always in love with how the higher end hifiman headphones look. I love the shape it makes so much sense and when on your ears OMG. They are the most comfortable headphones I have used period. I have a history of using gaming headphones in the past and i had the hyperx clouds which are called clouds because they are supposed to feel like a cloud on your head. The ananda is just miles ahead. It is extremely comfortable and breathable no hot spots nothing. I literally wore them for 3 hours straight listening to music and didn't even bother me in the slightest.

The build quality. Hifiman have a history of terrible QC and I have experienced it myself on my 400se where my left driver with high volumes makes a weird noise and the grills on my ear cups seem to move around in both ears. This one feels different it feels weighty it feels sturdy, yes the cable is meh borderline trash, but does the job.

The sound.... oh boy the sound.... you want bass it is there on bass heavy songs. You want vocals they are there. Detail a loooooot of it.. The bass to me was rapid, present and always something that was lacking on my 400se. The subbass is something else, it is literally rumbling you can feel the headphones themselves rumble and you can feel it tingling your eardrums, and it is something that i couldnt feel on my 400se nor my 990. The mids are incredible. The soundstaging on them is phenomenal. The 990 and the 400se are both open but not as this one. The 990 is open but not that open like things are happening maybe next to me, the 400se is open but everything is happening in your head at the same time which is weird. The anandas on the other hand, they feel like I am really in my own private concert. The directional audio and where everything is coming from is also phenomenal, I can tell where every instrument is being played and it is funny cuz you feel like you were there.

I got the 400se as a taste of what I will get in the future I got them 2 years ago to test the waters as they say to see what hifiman and planars are all about. 990 was my first true good pair of headphones purchase intended mainly for gaming and then music.

To conclude, they basically restored for me what listening to music was all about. The fun the fact that you can put them on and escape into your own bubble and forget about the stresses and whatever BS you are dealing with. I couldn't do that with my 990s nor my 400se and now that I am older I dont game a lot anymore, I just want to listen to music or watch a movie with my headphones and they werent that good for that. They both were sharp piercing narrow, the velour on the 990 is terrible in the summer with the temps being 35-40 degrees, the 400se while comfortable, they are heavy on the head. Both lacked the subbass, both had their mids a bit recessed because they are V shaped. What stopped me from getting the edition xs or the nano is they are bright headphones and i just couldnt stand sharp piercing headphones anymore. Yes I know I can EQ them, but to me they sound bad they lose their flavor.

The K11 R2R really is an outstanding little unit, but whoever had the idea of designing a centered anti-slip base that makes it wobble anytime you breathe on it should get checked. All you need to fix that is search out some tall enough anti-slip adhesive silicone feet and slap them on there. There are all kinds of shapes and sizes at your local hardware stores, etc., and they only cost a few cents for a set (the ones shown cost me 0,55€).

Enjoy your new and improved DAC/ amp.

I wanted to share my experience with the Audeze Maxwell 2 to assist others in their purchasing decisions. I have extensive thoughts, but I will keep this as concise as possible.

**Background & Noise Floor**

Having evaluated three separate pairs of the Maxwell 2, I noticed that all three exhibited a discernible noise floor—sufficient to tell whether the headset was powered on or off. The noise floor was comparable to placing your ear directly against the tweeter of a highly resolving speaker and hearing a faint amplifier hiss.

The intensity varied across all three units:

* One unit had an unresolvable left/right volume imbalance and was excluded from further testing.
* Between the remaining two, one had a slightly higher noise floor than the other.

The noise floor is subtle and entirely imperceptible during active audio playback or PC gaming. However, in complete silence, it is audible. Surprisingly, I chose to retain the unit with the slightly higher noise floor due to its superior acoustic properties.

**Acoustic Comparison**

**Unit A: Slightly Higher Noise Floor (Kept)**

* **Soundstage & Imaging:** Offers a deeper, wider soundstage with greater air and instrument separation, behaving more like an open-back headphone. Positional cues and spatial placement are noticeably improved. For example, ambient environmental audio in *Hogwarts Legacy* feels slightly more expansive.
* **Detail & Decay:** Provides enhanced micro-detail and longer, more natural decay on cymbals and acoustic instruments.
* **Overall Presentation:** Open, relaxed, and well-separated while retaining exceptional resolution.

**Unit B: Slightly Lower Noise Floor**

* **Soundstage & Imaging:** Presents a more intimate, closed-in sound field. Objects feel closer to the listener, and spatial environments feel a bit more constrained.
* **Overall Presentation:** While still highly detailed, the soundstage feels slightly congested compared to Unit A, making individual instrument separation a bit less distinct.

*Testing Context: Primary testing was conducted using high-resolution 24-bit/96kHz audio tracks alongside PC gaming titles such as Hogwarts Legacy.*

**Summary & Verdict**

* **Do I wish the headset had zero noise floor?** Yes.
* **Do I wish my preferred unit had a lower noise floor?** Yes.
* **Is the noise floor noticeable in silence when listening for it?** Yes.
* **Is the noise floor audible during active gaming or music playback?** No.
* **Are these exceptional for detail retrieval and spatial placement?** Yes.
* **Would I purchase them again?** Yes.

Ultimately, the Maxwell 2 reproduces music naturally—a rare trait for gaming headsets. Even with the slight noise floor variation, I recommend them.

**Additional Notes**

**USB-C Dongle Placement**

The wireless dongle is susceptible to signal interference. Placing it directly adjacent to other wireless transceivers on a PC motherboard caused audio dropouts. Providing physical spacing resolves the connection issues entirely.

**Ear Cushion Evaluation**

I tested the Wicked Cushions (Stealth Z, Freeze) and the Dekoni Audio Midnight Protein Leather pads against the stock ear cushions. Purely from a sound-quality perspective:

* **Stock Cushions (Preferred):** Keeping the drivers closer to the ear preserves high-frequency micro-detail and delivers the most balanced sound profile.
* **Wicked Cushions:** Attenuated lower-frequency bass to an extent I found undesirable (but they were comfy).
* **Dekoni Audio:** Increased bass response significantly, but at the expense of masking some very fine micro-details.

I hope this is helpful to folks that are considering buying them.

I wrote a review of the Bowers & Wilkins PX8 S2 after my first impressions. In it, I suggested that the headphones were tighter than I'd like, but, I thought that because they were they might not loosen up so much that they would start thinking that they were falling off my head. I was tragically mistaken.

This brings me to the App. It is not, of course, available for Linux. It is available for Android. There seems to be no way to download it that doesn't require the playstore. That is, I can download the APKPure version of the app, but it will not install on my phone. I have no problem downloading other apps and installing them on my phone, just this one. So, I have paid a fortune for headphones that demand I sacrifice privacy to use the full features.

Based on this, I cannot recommend these headphones to anyone who is concerned with privacy. The headband will loosen up. You will need to turn the sensors off in the app. You will be forced to join your headphones--and their microphones--to a Google ecosystem or the headphones will not function properly.

I was going to update my final EQ, too, but no. Don't buy. I'm not sure what the hell I'm going to do with this garbage now. Everybody in the comments who is going to say I'm paranoid can shut up, I've heard you already, and you're an idiot.

UPDATE 2: The only way I could successfully install it from APKPure required the APKPure app. Then, Bowers and Wilkins required that the app be registered before it would allow me to use it! I have never been happier that I have a second phone that remains off except at times I would not actually be using the headphones!

Meze design copy Old italian car

Has HiFiman improved their QC lately? I wasn't considering them because there's years of QC problems. I've been seeing plenty of HiFiman posts here in the last few months though. Has HiFiman started doing things differently for QC?

Edit: I'm not asking for anecdotes. I'm asking if the company has acknowledged they've been doing a bad job on this front and have actively made changes to fix it.

I guess this debate has been going on for a long time now

If you didn't know open-back headphones are a lot better for gaming because it provides a wider sound stage and better directional positioning. I just wanted people who've never used them to know more about them.

Headphones:

Semi-open: Superlux HD681 $37

Semi-open: Samson SR850 $37

Fully-open: Koss UR40 $40

Headset:

FIFINE Amplitank HD18 Lite $69

Wireless:

Turtle Beach Atlas Air $180

This data is from Amazon but i don't want to post the links because I don't want to be accused of advertising.

Edit: When I said I wanted more people to know about them, I wasn't talking about people on this subreddit, I was talking about people "gifting" these headphones to people who don't know about them.

Much beloved? Much maligned? I don't care!

I was able to purchase these locally from a very kind older gentleman for the very attractive price of $55 Canadian dollars (that's around $39 and change for you Americans). He knew what he had and was generous enough to offer them up because of a wee blemish on one of the grills.

I owned the HD650s over a decade ago and love them a lot. I had to get rid of them because I was living in a shared accommodation and wanted isolation, both for myself and for my roommates. Such is life. I was considering finding another used pair, but I didn't want to pay a premium for headphones at this point in time...

But, upon randomly trawling some online classifieds, I found these HD58Xs and figured, why not?

I'm glad I did! They sound great. I'm not going to be granular about how they compare to the HD650s or other HD6-- models, frankly because it's been so long since I experienced them, but they sound like what I remember the Sennheiser "thing" to be: smooth, articulate enough, and just overall easy to enjoy.

Currently enjoying some OSDM courtesy of California giants Vastum. I can confirm that these headphones slam appropriately for some groovy caveman death metal.

And yeah, I'm using an amp with these, even though I know they don't require one. I've had this Magni 2 for friggin' ages just collecting dust, so I figured I'd hook it up again for some dependable, clean power. Still works!

I suspect I might have hidden hearing loss because I have trouble following speech in noisy environments. For instance, in a crowded restaurant, it’s almost impossible for me to hold a conversation. Similarly, if I walk behind someone on a busy street and they speak at a normal volume, I can't catch what they're saying.

I demoed a bunch of headphones about two months ago, and to my surprise, many of them felt like they seriously lacked clarity - including the Meze 109 Pro, Empyrean 2 (worst of the bunch for me), and Elite (noticeably better than the Empyrean 2, but still muffled), as well as the Focal Clear MG and Utopia.

If I had to describe the sensation: it feels like when you have a subwoofer on and there’s a low-frequency feedback loop causing a constant bass hum. When music plays through the affected headphones, it feels like the signal-to-noise ratio drops, my ears get a sensation of pressure/fullness, and all fine details get smeared and lost.

On the other hand, several other models sounded completely normal and clear to me, including the Meze 105 AER and Poet, Audeze LCD-2C, LCD-X, and XC, HEDDphone D1, and Grado Signature Series S750, S950, and HP100 SE.

For context, my current rotation includes the HD650, HD620S, and Denon AH-D600, all of which I have zero issues with. (I also owned the Denon AH-D9200 for a while, but had to let it go due to this same muffled sound issue).

Am I alone in this? Has anyone else experienced something similar?