The 64 Audio Volür happens to be the fifth set from the brand I've tested properly at home and this spans a range of $1100 to $3000. It would be fair to say this isn't priced for someone looking at their first set of universal-fit IEMs. Indeed, knowing also how many features there are and the tuning that is deliberately colored on many of the brand's IEMs, I would highly encourage trying them out first at a store or trade show if you get the opportunity. As it happens, the least expensive 64 Audio UIEMs in the form of the U4s at $1100 happen to be the best starting point in terms of being clean, comfortable, offering a good sound, and providing the full assortment of features including LID and Apex modules that can give you four (five if you remove the modules for whatever reason) different tonalities to choose from. There are also aftermarket modules for further customization!

So why would you go for the $2500 Volür if the $1100 U4s was already doing a good job? The answer is simply because people naturally want more. Once you've had a taste of the 64 Audio house sound, you more or less know whether this is the brand for you. The U4s is impressive but it's not the most detailed set for the money. There's the U12t which is more resolving but the all-BA driver composition will always have people question whether there can be something better for bass. The Nio released a few years ago aimed to address this to an extent but went even more colored for a bass-first presentation that can be fun but not necessarily for everyone. With the new Volür, 64 Audio has decided to take on the complaints from people who were also saying the brand has been resting on its laurels for a while without much driver innovation or competing on detail retrieval for the money.

The dual dynamic drivers placed in a true isobaric configuration result in some of the very best bass I've heard in IEMs to date. It's engaging, highly dynamic, very resolving, and you can freely add more adjectives here such as punchy, slammy etc as well. The Volür goes for a warmer tuning out of the box with the m15 modules and it's bassier than the U4s/U12t/U18t/Duo as well, with excellent sub-bass extension. You can turn down the volume and still appreciate the nuances in your music library, or go up if you want to attend a private party of one. The different modules can help shift the tuning so play around and see what works best for you. I personally found the m15 modules to work best in showing off the Volür's strengths which still keeping the bass relatively tight and not muddy at all. If anything, the warmer sound adds some body to the lower mids that perhaps some were missing out of the the likes of the U12t without going overboard as with the Nio. Knowing also how this is more resolving than either of these and competing more with the likes of the $3500 Fourté in this regard, as well as holding its own against the other offerings in the $2500 price range, 64 Audio finally has something that I feel can be touted for both bass and resolution.

That said, even if you can afford to purchase a $2500 set of IEMs, the Volür is not for everyone. The overall sound presentation is quite novel as a result of the driver configuration and engineering done. Most vocals sound amazing, but some may come off slightly honky or subdued. In addition, I've also found that vocals in general sound close to you—right in the middle of your head—whereas instruments spread around in a wider sound stage. This can take some getting used to and I grew to love it for my acoustic jazz and piano/strings collection in particular. But if you are a fan of, say, metal or classic rock then it may not do justice to the drummers in the background. There's also the part where the new tia waveguide is perhaps too good at its job. The upper treble peak can be a bit much for people sensitive to the air region and the mid-treble dip only accentuates this. It's not often that I take to EQ in this region but I did so to make my time with the Volür all the more enjoyable. The end result is a warm, almost L-shaped sound that is detailed and fun at the same time. The Volür is a true contender for an endgame set and certainly ends up being my favorite 64 Audio offering to date—just make sure it's the same for you before shelling out the cash.