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7hz FIVE


Why pack 10 dynamic drivers into a single pair of IEMs? What sonic advantages come from cramming so many drivers inside? Honestly, I'm not entirely sure. However, I believe this is 7Hz flexing their engineering prowess—because they can, and why not? After all, innovation often begins with doing something different.

Whats inside the box:



When you pop the 70Hz Five into your ears, the first thing that hits you is the unapologetically fun V-shaped signature. It’s as if the Five was designed with a singular mission: to make your music experience a lively, engaging affair that transport you back to those techno warehouse raves or a moshpit in 90s grunge concert. For those who like to dissect sound signatures with there eyes with FR Graphs, be warned—the Five defies the graphs. The treble, which might appear harsh on paper, doesn’t translate that way in real life, specially with a couple of days burn-in Listening to music and using your ears is always the ultimate test, and in the case of the Five, your ears will tell you a different story from what the graphs might suggest.


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One important thing to note is that the Five really benefits from burn-in actually its a must, you really really need to burn this in. Straight out of the box, the treble can come off as a bit too prominent and in your face and the bass is everywhere, i actually rarely burn-in my iems, i just use them straight out the box for a couple of days before writting my impression, it was actually Ray from 7hz who commented in one of my 7hz post on facebook he suggested to burn-in the Five for 2 days, i have never tried burning in an iem for that long since i was never a patient person but i have no choice since i honestly did not enjoy how the Five sounded out of the box and so i did it and after letting it sit on the burn-in rack for 48hrs or so, the treble smooths out noticeably and the bass is now controlled more balance sounding with the mids stepping a bit more forward now It’s a transformation that makes the Five sound like a totally different IEM from the when i tried it out of the box the first time, I have not encountered and IEM that responds to burn-in like the 7hz Five. 

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The bass is where the Five truly shines. This IEM embraces an old-school mid-bass focus bass, delivering a big, reverberant thump that makes bass-heavy genres like EDM and those Roland 808 bass thump popular on OG hip-hop, OG Heavy Metal and even those 80s synth bass an absolute blast. There’s a bit of a sub-bass roll-off, but bass lovers won’t mind—they’ll be too busy grinning at the sheer weight and impact of the meaty bass. That said, the bass quality itself is good, with excellent smooth texture and energy. There’s a little bass bleed that goes to the lower midrange i noticed on some tracks, but nothing that detracts from the overall experience. As with many IEMs tip rolling and finding the perfect eartips that seals perfectly contributes not only the lowend but the overall dynamics of the sound, for me to best fully enjoy the Five experience you must listen to it loud as in high volume as loud as you can handle but still on the safe level.

When listening with the Five at normal volumes it stick to its V-shaped profile, the Five’s midrange takes a bit of a backseat, The lower mids are recessed, The upper mids, on the other hand, are boosted and extended just enough to give vocals clarity and airiness, though the strong bass presence ensures the Five doesn’t veer into shouty territory and ensure to smoothen out potential high peaks that could contribute to harshness and when you apply a bit more of volume the mids specially vocals get more pronounce and more forward sounding with the overall sound more balance sounding a little less V shape.

The treble continues this trend, with a notable rise in the lower treble that injects energy, details and resolution into the sound. This can be a bit bright right out of the box, but as mentioned earlier, it mellows out after some burn-in time. Even so, the Five remains on the brighter side, so if you’re particularly sensitive to treble, some eartip rolling might be in order to tame it, i would suggest the standard Divinus Velvet tips as i notice this tips does a good job of smoothing out the treble on most iems i use it with, overall the Fives treble is energetic, bright but with natural timbre, and no harshness and fatigue.


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7hz Fives tone and timbre is natural and lifelike, with no noticeable artificiality. Whether it’s the warmth of a guitar or the slap of the strings on the bass guitar and subtle rasp of a vocal, the Five delivers it with authenticity and its to be expected since all 10 drivers are dynamic driver.

When it comes to technical performance, the Five is above average. It offers good soundstage width, with above-average height and depth. This creates an expansive and somewhat semi holographic listening experience. Imaging is decent, with instruments and voices placed accurately within the soundstage, though it might not be the sharpest in its class. Still, the level of detail is impressive, with the lower treble boost helping to bring out micro-details in the music. Instrument separation is solid, even when the music gets busy with multiple layers and competing riffs.

In terms of speed and resolution, the Five holds its own. The resolution is commendable, allowing you to pick out both macro and micro details. The attack and decay of notes are surprisingly quick for a all DD setup, which results in a clean and well-resolved sound that doesn’t feel muddy or congested.


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In summary, the 70Hz Five is a fun, engaging IEM that knows how to make music enjoyable. It’s not perfect—the midrange recession and occasional brightness might be dealbreakers for some—but if you’re looking for a truly fun bass-heavy, V-shaped sound that doesn’t skimp on energy or detail, the Five is definitely worth a listen. Just remember to give it some time to burn in the longer the better and find the right eartips to truly make it sing. remember burn in is a must with this set.

Linsoul link: https://www.linsoul.com/products/7hz-five

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