Disclosure: I’d like to thank Linsoul for sending me the 7Hz Timeless II for this review. All thoughts and opinions are my own, and Linsoul had no say or input on the contents of this review.

The 7Hz Timeless II arrives as the follow-up to what many consider the IEM that sparked the planar magnetic craze back in 2021. At $229 USD, this latest iteration from 7Hz takes everything that made the original Timeless special and addresses the complaints that audiophiles had with its predecessor.

The standout feature here is the larger 14.5mm planar magnetic driver with dual-sided coated diaphragms. The circular faceplate design remains as distinctive as ever, while the V-shaped sound signature delivers punchy bass and an impressively wide soundstage. The real question is whether all these improvements justify the price bump and if the Timeless II can hold its own against competitors like the Kiwi Ears Aether. Let’s find out if 7Hz has managed to create something truly special here.

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• 7Hz Timeless II
• 4 interchangeable nozzles
• Cable
• 10 pairs of eartips (S, M, L sizes)
• Aluminum storage case
• Documentation

I love the unboxing experience of the 7Hz Timeless II. Upon opening the box you are greeted with top of the aluminum case and the 3 additional nozzles screwed into an aluminum plate, with a clear plastic cover to protect it all. Upon removing the insert, a box containing additional ear tips is located underneath where the nozzle plate sits. The case holds the IEMs, cable, and additional cable termination. I prefer this over showcasing the IEMs in a foam cutout, as they are always difficult to get out of the cutouts. Here, everything is set up so you can just plug the headphones into your source and start listening.

The 4-core 7N single-crystal copper cable is a solid upgrade from what you typically see at this price point. The modular design lets you swap between 3.5mm single-ended and 4.4mm balanced connections without buying separate cables (the 4.4mm connection is installed by default). The cable itself handles well, with no excessive tangling and minimal microphonics when it rubs against your clothes.

You also get quite a selection of ear tips here:

• Four pairs of white silicone tips with color-coded stems
• Three pairs of blue silicone tips
• Three pairs of clear silicone tips

Getting the right tip is crucial since it affects both comfort and seal. I really appreciate the variety of tips included, as each set has a meaningfully different shape to fit different ear canals. I ended up using the blue tips, but also occasionally switch to the clear ones as they are the tallest and provide the best seal for me.

Lastly, the included aluminum case is very solid and feels extremely premium. It’s large enough to hold the tuning nozzles (more on them later), IEMs, and cable, as well as a dongle DAC. The bottom of the case has a layer of foam padding, though personally, I would have liked to see the sides lined with foam as well to provide better protection.

The Timeless II has a distinctive circular design with a textured faceplate that gives it a unique visual appeal. The all-aluminum construction strikes a nice balance as you get the durability of metal without the weight penalty that usually comes with it.

At 5 grams per earpiece, these feel surprisingly light for an all-metal IEM. The circular faceplate makes them look bulkier than they actually are, and the shell itself has been shaped to follow the contours of your ear. Most people with medium to large ears should find these comfortable, though the stems are on the shorter side and the nozzles are slightly wider than average. I have smaller ear canals, and using the small blue eartips and small clear eartips, I found the Timeless II to be perfectly comfortable, even when listening for over an hour.

The shell design includes four vents, with three on the outside edge and one on the inside, that help prevent pressure buildup when wearing them for longer periods of time. It’s one of those details that you don’t think about until you need it, but it makes a real difference for extended use.

The four included tuning changes the sound in specific ways. The flat nozzles have different opening patterns, with the gold flat featuring a flower-petal cutout design and the silver flat having larger openings that boost bass slightly.

The dome-shaped nozzles offer their own character. The gold dome gives you a warmer midrange with more polite treble and less aggressive upper-midrange. The silver dome has a unique treble profile that honestly might not work for everyone. Each nozzle comes with rubber gaskets that keep them secure, and I haven’t had any issues with them coming loose during use.

The Timeless II is fairly easy to drive, which might sound odd since in the headphone world, “planar” usually means you need a decent amp. Not the case with planar IEMs though, most (including the Timeless II) sound just fine with everything from laptop headphone jacks, the Apple USB-C to 3.5mm dongle, and pretty much all DAPs.

7Hz also tries to hint that you need more power by having the 4.4mm balanced connection pre-installed with the cable, but I used both the 3.5mm and 4.4mm balanced with various sources, and there is absolutely no difference between them when volume matching. Rest assured, whatever source you have will drive these IEMs just fine.

The majority of my listening was done using the gold flat nozzle, which is installed by default and is honestly my favorite nozzle of the four. The 7Hz Timeless II presents a V-shaped sound signature that leans analytical without sacrificing musicality. It has a well-extended sub-bass, natural sounding midrange, and an airy and sparkly treble that isn’t peaky or sibilant.

Bass

The bass performance here is genuinely impressive for a planar magnetic driver. The 14.5mm driver delivers sub-bass extension that reaches down pretty far, giving you a nice rumble. The sub-bass presence stays active and consistent across most tracks, and is very noticeable with electronic music.

What really caught me off guard was how the Timeless II manages to deliver a satisfying punch while keeping the planar speed and precision. Bass guitars have excellent texture, allowing you to hear the string resonance clearly, which is something many planars struggle with. The decay is quick though, so if you’re used to the lingering impact of dynamic drivers, this might feel different at first. I personally grew to appreciate the speed, especially with complex basslines where notes need to stay separated.

Midrange

The midrange strikes a nice balance between being analytical and remaining musical. Vocals sit right where they should in the mix, not pushed too forward, not recessed, just naturally placed. Female vocals particularly sound clear, with emotional weight and energy.

Male vocals can sound slightly thin at times due to the stronger upper midrange presence compared to the lower mids. This creates the mild V-shape sound signature, prioritizing clarity over warmth. It’s not a dealbreaker, but something to be aware of if you prefer a more full-bodied vocal presentation. It’s mostly evident in male singers with deeper voices, where the weight of their voice comes from their chest. You lose the fullness of it here.

The instrumental separation and layering in the midrange are excellent. Backing vocals layer seamlessly around lead vocals, and complex arrangements never feel congested.

Treble

The treble is where the Timeless II really shows its technical skills. Extension is exceptional, and what impresses me most is how refined the detail retrieval is without being bright or peaky.

7Hz has clearly worked on eliminating the “planar glare” that has plagued earlier planar IEMs. Guitars and cymbals sound natural and lifelike, avoiding that harsh, blunt character some planars can have. The treble maintains airiness and sparkle without becoming fatiguing, helping with long-term comfort.

Soundstage and Imaging

The soundstage is fairly spacious, with the presentation giving you a more three-dimensional feeling. Tracks never feel congested, and there’s enough width to make gaming enjoyable.

Imaging feels precise, adding to the overall realism. What’s particularly impressive is how consistent the dynamics remain across different volume levels, not something you see often with planar drivers.

Gaming

The Timeless II makes for good gaming IEMs. The V-shaped sound signature usually has that effect, but the soundstage is reasonably spacious, imaging is accurate, and detail retrieval is excellent, which are all earmarks for a good gaming IEM.

The Kiwi Ears Aether is another planar IEM, but it has a larger 15.3mm driver compared to the 14.5mm driver of the Timeless II. The Aether also has a V-shaped sound profile that leans slightly neutral with a hint of warmth, but has a more relaxed sound to it. I find the Aether has a slightly less satisfying bass response as it lacks some of the punch that the Timeless II has. The midrange differs the most, with the Aether having an overall smoother response here with an emphasis on natural vocal reproduction. I prefer how male vocals sound on the Aether as they don’t lose their body or weight. The Timeless II has a more energetic midrange, with vocals being slightly more forward, but thin at times for some male vocals. The Treble for both IEMs is airy and not sibilant.

The Timeless II also has a more intimate sound compared to the Aether’s spacious audio reproduction. I do find the Aether a bit more comfortable as the nozzles have a more solid and secure fit in my ear canal, but overall, both are comfortable.

The Aether sells for $170 USD compared to $220 USD for the Timeless II, and while I wouldn’t say the Timeless II sounds $50 better, it does sound better and comes with a higher quality cable with interchangeable terminations, tuning nozzles, and a good assortment of eartips. If I had to choose one purely on sound quality and enjoyment, I would go with the Timeless II.

For me, the 7Hz Timeless II succeeds because it doesn’t try to do too much. It’s a well-engineered planar IEM that sounds good, fits most people comfortably, and gives you some tuning options to play with. The included accessories are also useful and of high quality. Sometimes that’s exactly what you need.

I’d recommend the Timeless II to anyone looking for their first planar IEM who values versatility and durability. It’s not going to revolutionize your listening experience, but it will consistently deliver enjoyable sound across a wide range of music. That counts for a lot in my book.

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