These new in-ear headphones from 1MORE have a single carbon driver for mids and lows with three balanced armatures to handle the high and ultra-high frequencies.  This is not a surround sound implementation but instead an attempt to provide very high quality sound from in-ear monitors.  TechPowerUp tested these Dolby Certified headphones and found them to be an improvement on the already impressive Triple Driver model, even powered by a smartphone; they do not require a DAC or pre-amp to provide great sound.  On the other hand, $200 is steep for this style of headphone so read through the review before jumping on Amazon.

"On the wings of the raging success they had with their $100 Triple Driver In-Ear Headphones, currently considered one of the best IEMs in terms of price-performance, 1MORE brings us their even more refined sibling equipped with an additional balanced armature. Do the 1MORE Quad Drivers have what it takes to justify a price bump to $200?"

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