yo! been doing this for a decade and i totally get the 7506 fatigue. If ur looking for honesty, compare the Sony MDR-CD900ST Studio Monitor Headphones vs the Sony MDR-V6 Studio Monitor Headphones. The 900ST is WAY flatter! Pro tip: check out the frequency charts on RTINGS or use Sonarworks SoundID Reference for Headphones software. It literally levels the playing field by flattening any headphone curve. Honestly, its a total game changer for mastering accuracy!!

sooo i'd look at Sony MDR-MV1 vs Sony MDR-7506 vs Sony MDR-M1ST.
- 7506: too bright/harsh
- M1ST: hard to find
- MV1: natural and comfy
i'd go with the MV1 cuz it's way safer for your ears during those 8-hour sessions and feels more honest for mastering. TL;DR: Sony MDR-MV1 is the best choice for serious studio work. gl!

yo! stumbled upon this discussion and i love the energy ur bringing to the new studio!! curious about one thing: what’s ur actual room environment like? i mean, are you in a noisy spot or is it a super quiet dedicated space? that makes a HUGE difference when picking between open and closed backs since u dont want sound leaking in. here is how they compare basically:
1. Sony MDR-7506 Professional Large Diaphragm Headphone: fantastic for tracking but honestly way too bright for mastering. ur ears will get tired so fast.
2. Sony MDR-M1ST High-Resolution Monitor Headphones: these are the modern closed-back standard. they're flatter but kinda hard to find and pretty pricey.
3. Sony MDR-MV1 Open-Back Reference Monitor Headphones: these are amazing for mixing! since they're open-back, the soundstage is way more honest. i think the Sony MDR-MV1 Open-Back Reference Monitor Headphones is probably ur best bet for those long 8-hour sessions. tl;dr: go with the Sony MDR-MV1 Open-Back Reference Monitor Headphones for mastering transparency and comfort. peace!!

I have been staring at the technical frequency graphs for a while now, and honestly, I have a slightly different take after owning a few of these long-term. Everyone is really into the brand new models, but I kind of disagree that the most recent ones are always the most honest for mastering work. I am still a bit of a beginner with the deep physics, but I noticed the older premium builds feel more stable for critical listening.

• Sony MDR-7520: This is basically the 7506 but way more advanced. It has magnesium housings which I think helps stop the cups from vibrating and coloring the sound. The high end is much flatter and not piercing at all. They are SO durable, but since they are discontinued, they are hard to find.
• Sony MDR-Z7M2: These use huge 70mm drivers. The sound feels really natural, like youre in a room, not wearing headphones. Pros: the padding is amazing for long sessions. Cons: they are kinda bulky and heavy. Does the driver size actually change how you hear the EQ? I always wonder if bigger is just better for accuracy. TL;DR: I would look for a used Sony MDR-7520 if you want pure honesty without the harshness, or the Sony MDR-Z7M2 if you want the most comfortable, wide sound for mixing.

Just saw this thread and wanted to jump in with a more technical perspective. Before you pull the trigger on any of these, what kind of interface or dedicated headphone amp are you planning to drive these with? The output impedance of your gear is basically gonna dictate the damping factor and how tight that low-end response actually stays, especially with newer high-res drivers. If you want that absolute honesty for mastering, I’d actually point you toward the Sony MDR-M1 Reference Monitor Headphones. These are the brand new global successors to the older studio lines. From a DIY enthusiast standpoint, the best part about sticking with Sony for professional work is the sheer serviceability. You dont need to send them to a pro service center for every little thing - the modularity means you can basically swap the drivers or pads yourself to keep them meeting factory specs after years of heavy use. A few technical specs to keep in mind for your sessions:

• 40mm drivers with a very high-compliance diaphragm for better transient accuracy
• Closed-back design but with integrated ports to manage internal pressure and air flow
• 5Hz to 80kHz range which ensures better phase linearity in the mids Honestly, the MDR-M1 feels like a more refined, technically capable tool for critical decisions than the older models mentioned earlier. Tbh, it solves that high-end fatigue issue you're worried about while maintaining the accuracy needed for a professional room.

Quick reply while I have a sec. Man, this thread is a goldmine. We have touched on everything from software correction and room noise to amp pairing, which is honestly huge for performance. It really sounds like you have a solid handle on the technical side now. If you want my two cents after years in the booth, just go with Sony. You honestly cant go wrong with any of their high-end studio gear when you need that level of accuracy. Their pro-grade monitors are built specifically for these types of sessions, so just grab any of their top-tier reference units and start mixing. You wont regret sticking with the brand that basically defined the studio sound.

> "what’s ur actual room environment like? i mean, are you in a noisy spot or is it a super quiet dedicated space?" So true!!! I spent weeks doing market research before I pulled the trigger on my current setup because I was so worried about making a mistake. Honestly, when you look at the big brands—like comparing the Japanese market leaders to the big German or Austrian names—it's wild how different their "professional" sounds are. I’m still a bit of a beginner, but my personal story is that I almost went with a totally different brand because I read they were more "safe" for long-term use and had better reliability in the long run. I ended up sticking with what I have, but I constantly check if the market trends are shifting. It's like, do you go for the industry legacy or the new tech? I found that some brands really prioritize that clinical, flat response while others are definitely more about the "musical" experience. I'm always asking myself if I should've researched the competitors more... it’s such a big investment and I just want to be sure! Tbh, market research is such a rabbit hole and I'm still not 100% sure I made the right choice for my ears.

Can confirm this works. Did the same thing on mine and its been solid ever since.