Design and Functionality

The Etymotion cable is simple in design, with a basic cable, 3-button remote and battery pack. It uses MMCX connectors for the ER2/3/4 series but it will also work with most MMCX equipped IEM’s, the angled connectors however are not always ergonomic with all earphones (I would have preferred them to use more universal straight MMCX connectors). The battery pack isn’t small but if you wear it with the cable behind your neck it sits well, there are 2 included clips to help support it too which is good. Overall it’s not too clunky, and it has to house more electronics than most for optimal sound quality, one thing to note is the use of the outdated micro-USB for charging, most devices have now moved on to USB-C.

Functionality is good, it’s simple and easy to use with the middle button acting as the power button as well as play/pause/skip tracks, paired with volume up/down buttons too. There are not really any special features to the Etymotion cable, its a basic Bluetooth cable that focusses on sound quality over gimmicks. Battery life is around 8-10hrs depending on the volume, and it supports Aptx, Aptx HD and Aptx LL which is welcome.

Interestingly Etymotic have taken the approach of having a Qualcomm Bluetooth receiver chip, which passes the incoming digital signal to an AKM4331 which then decodes and amplifies it. This is usually a much better approach to bluetooth implementation and should result in better audio quality along with higher volume output.

Sound

I mainly used the Etymotion cable with the ER2SE as the neutrality of these should bring out any weaknesses of the cable. Firstly the Etymotion doesn’t take away that classic Ety sound you would expect from the ER2SE, instead it really compliments them. You get the same controlled low end, open and honest midrange and great treble presentation and extension. It doesn’t really take anything away from the sound and the usual “Bluetooth compressed” sound is gone, it’s open, spacious and articulate. The Etymotion cable knows how to deliver the sound to your earphones as it was intended, with help from that little AKM chip.

I don’t find myself wanting to plug the cable back in and go wired when using with a mobile phone, arguably when paired with a device that uses Aptx HD you likely get better quality than if you were to plug them in to the phone directly. Initially I was sceptical, as we have great Bluetooth cables from Shanling in the form of the MW200, but I prefer the cable of the Etymotic over the neckband of the Shanling and the sound of the Etymotic cable is a little more neutral to my ears. If you are already an Etymotic fan but want something that is wireless, this really is the answer, I personally love the ER2SE and with this option to go wireless it is something that is really enjoyable and convenient when out and about.

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Aesthetics and Build Quality:

Much like all other Campfire models, the Polaris are a thing of beauty. The precision CNC’s machined housings look perfect, the blue really does stand out against the black screws and smoky cable. Even the case compliments the colour scheme. Campfire, in my opinion, make some of the best-looking IEM’s out there.

Build quality is another strong point, the metal housings are perfectly finished, and the MMCX sockets are some of the best I have ever come across. The cable is a silver plated litz cable that is twisted, with good strain relief on the 3.5mm angled jack. I can see the anodised finish showing scratches in the long run, but I personally find that adds character to them.

Comfort and Isolation:

The housings may look uncomfortable but the inner sides have softer edges and once you find the right tips the Polaris are incredibly secure and comfortable to use. I found them to fit and sound best with foam tips, but this is down to personal preference. The cable now uses pre-moulded ear-hooks which I find to sit much better than stiff memory wire, it’s great to see more brands using this. My one tiny gripe here is driver flex, which is quite present when you first insert them.

Isolation is very good, perfect for daily use and commuting, even though the housing is vented for the dynamic driver, I don’t find this impacting isolation much.

Sound:

Bass: This is the part that is immediately noticeable when you first try the Polaris, and for good reason. These are made to deliver a very full and powerful sound, and they do that without fault. The bass carries real weight and impact, you feel as well as hear the notes. The bass may be the prominent frequency band on these, but they do this without totally masking the rest of the frequency response. They are not a dark, bloated mess, yet they still have a bass-heavy signature which is very impressive and a lot of fun. The sheer weight and power of the low end is quite astonishing, yet it manages to steer clear from masking the mid-range too much, only giving the lower midrange a hint of warmth.

Midrange: The midrange is clear and detailed, yet does come across a little behind the bass in terms of absolute presence. The lows do give a little body to the lower midrange, but the upper midrange is quite up front. The transition from the upper midrange to the lower treble is not the smoothest, bringing out a bit of sibilance in the recording. They do not suffer badly from sibilance, but it is there nonetheless, and more present than a few other IEM’s that are a little smoother. The Polaris trade off a little refinement for fun factor, and I honestly am fine with that. They are engaging, the midrange is clear and well defined, especially when you compare it to the bass.

Treble: Due to the T.A.E.C technology, the Polaris has an incredibly open and airy top end. The treble extends effortlessly with excellent tonality and presence, however is it not peaky or harsh. The openness of the top end really aids the soundstaging capabilities of the Polaris, offering a really spacious sound that is not congested or closed in. There is plenty of detail up top and the energy is what mainly prevents the Polaris from sounding too dark. I really do enjoy the treble performance of the Polaris, providing the perfect balance between being there and clearly audible, but not bright and overbearing. Campfire don’t need to artificially boost the top end to give a sense of extra detail, because the detail is there and audible.

Conclusion

The Polaris are one hell of an IEM, with a very powerful and engaging sound signature. The bass is there by the bucketload, yet the midrange is detailed and only slightly behind when it comes to presence. The highs are effortlessly extended and packed full of detail, giving them a sense of space and air that really opens the Polaris up. Overall a great buy if you want an engaging and powerful IEM.

Sound:  4/5

Comfort: 5/5

Build: 5/5

Value: 5/5

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