Impressions: 1More's Quad Driver

1More sent me both their Quad and Triple Driver IEMs, and I'll have the time to compare them directly, as well as give full reviews of both of them independently.

The first thing to notice about these is their design. It's pleasantly understated, with a mainly silver design, and red highlights on the venting for the one dynamic driver present, with the other three drivers being balanced-armature. The IEMs themselves get slimmer as they move away from the ear, with a straight metal rod containing the cable as it terminates into the IEM. The cable itself isn't too microphonic, but it isn't silent by any means. Interestingly, it is a twisted black and red cable with a polymer or plastic coating over it. The cable splits around the center of my sternum, and there is a three-button controller, with a microphone, that rests just above my clavicle. It terminates in a right-angle TRRS 1/8" auxiliary connector, with the "S" being used not for balanced operation, but for the button controller, which works very well with my Pixel, pausing and controlling volume without issue. The headphones share an impedance and sensitivity rating of 32 Ω and 99 dB/mW with their brother-less-one-driver.

These headphones absolutely run the gamut with accessories. They come with a branded and seemingly high-quality airplane adapter and shirt-clip, a solid synthetic leather case (which is a very convenient size and design, with a strong magnetic latch), a 1/8" to 1/4" TRS adapter, and a truckload of ear-tip sizes, all labeled (to be specific, 6 silicon options and 3 foam options).

The headphones themselves sound great. To my ears, after having had them only for a day or so, they are slightly V-shaped, without recessing the mids to the point of sounding veiled or vague. The bass is rounded and full, without being flabby or sloppy, and extends very low without too much distortion or apparent effort. The mids are detailed, but not particularly lush. Female vocals can come across as slightly sharp, but nothing too unpleasant, and certainly not a low point. The highs are airy and extend very well without being sibilant. Something particular that I've noticed, and please take this with a grain of salt, as I haven't had enough time to truly refine my thoughts, is that these have a bit of trouble rendering cymbals, as they tend to turn more into a general "Tss" than the defined "Tang" and decay that they are in real-life.

I will continue to refine and form my thoughts as I listen to these more and more and come back in the full review with a much more detailed and in-depth report, to my experience.


These headphones were provided to me for review by 1More. I am not being paid by anyone to write this review, to endorse the product reviewed, or for the content that I put in the review.

These headphones were powered by an Astell&Kern AK Junior, a Google Pixel, a Neurochrome HP-1, an iFi Pro iCan, a Chord Mojo and by whatever soundcard is in the motherboard of my computer.

If you'd like to get a sneak peek at upcoming reviews and website updates, feel free to follow us on Instagram @hearfidelity or follow us on Facebook at