7 Hertz Eternal Review

It was pretty recently that I finally was able to try out the Timeless from 7 Hertz. This is a brand that’s kind of come out of nowhere and has been creating talks in audiophile spaces for quite some time. Now they’ve released their follow-up to the Timeless, the Eternal, a dynamic IEM for $249. Does it live up to 7 Hertz’s name that they have built with the Timeless?

What You Get

• Eternal earphones
• Metal case
• 1 pair of nozzle filters
• 3 sets of multicolored tips in three sizes
• MMCX cable

Look and Feel

From the outside, the Eternal has the same design philosophy as the Timeless. It brings over the circular housing, but this time with an exposed front plate protected by an optical sapphire glass. I like this style of build a bit more than the Timeless, as it provides more color and flash to the 7 Hertz aesthetic. It is still pretty weightless and is made out of a CNC aluminum shell. I can see some still not being a fan of the way these IEMs fit, but I haven’t taken issue with them just yet. To me, the Eternal is just as comfortable as the Timeless, while featuring the same level of craftsmanship.

Design

The Eternal implements a 14.5mm LCD polymer dynamic driver, with a liquid crystal polymer diaphragm. This design is crafted with dynamic range in mind, with an ultra-broadband response helping to achieve its desired signal flow. Its cable is an MMCX 3.3mm cable made from single-crystal copper with single-crystal silver.

Soundstage

I was impressed with the soundstage on the Timeless, so I had a good amount of expectations before I hit play on my first track with the Eternal. Even though the Eternal shows some good linear spacing in its soundstage, it, unfortunately, doesn’t reach the level of the Timeless. Its left and right channels show good distinction and balance, but their width is lacking. You may not notice it with more relaxing tracks that don’t require a ton of sound elements, but with busier tracks, it becomes evident that the Eternal can’t handle more intricate layering. This is most noticeable in powerful electronic or metal tracks, as it feels like a lot of sounds are fighting to break out from the middle. The Eternal still keeps to an admirable level of spatial imaging in most cases, but not a whole lot of it stands out.

Low End

It’s apparent almost immediately from hitting your first track with the Eternal that the lows aren’t where its focus is going to be. The timbre still has some good punch to it in some regions, and it all appears in the sound signature with a respectable amount of clarity. There’s a natural response here that provides some lift to the sound signature but ultimately doesn’t give the listener a lot to bite on.

Mids

In the midrange, the tonality is given a lot more energy and detail to uncover. I wouldn’t say the timbre completely comes alive here, as most of the frequency response is still relegated to neutrality. It definitely makes the sound signature a lot more flat and even, while providing definition to its frequencies. The upper mids gain a lot more drive, adding some crisp textures to the frequency response that help add to the fullness of the region.

Highs

The treble is where the sound signature showcases its goods. There’s a shining brightness to this region that also shows a surprising amount of restraint for an IEM with this style of tone. Its timbre is brimming with detail and features a ton of bite, but it can be pretty overwhelming for those who aren’t into a ton of treble.

Summary

The 7 Hertz Eternal isn’t what I expected, but there’s enough to like here to warrant a purchase. I definitely prefer the Eternal when it comes to the build, but the soundstage kind of muddies the waters for a solid timbre overall. It’s a bright but forgiving IEM that brings liveliness to your tracks, albeit in a picky way.

The 7 Hertz Eternal is available at Audio46.