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64 Audio

64 Audio U4s In-Ear Headphones - Open Box

64 Audio U4s In-Ear Headphones - Open Box

Final Sale More information
Final sale items are not returnable but they come with a full warranty.
Open Box More information
Open box items are final sale.
Regular price $799
Sale price $799 Regular price $1,099.00

The 64 Audio U4s fills a perfect hole in the IEM world. A bass lover's dream in-ear headphone!

Wearing style More information
Over-ear headphones sit over your ear and surround your ear with a ring of padding. On-ear headphones are padded but rest on top of your ear. In-ear monitors are worn inside your ear canal.


Driver type More information
Speakers and headphones use a device called a 'driver' to create sound. Different types of drivers have different strengths and weaknesses, but can all produce great sound. Common varieties include dynamic, planar magnetic, and electrostatic.

Dynamic, Balanced Armature

Connectivity More information
Connectivity refers to the method in which the headphones connect to the audio source. Headphones can be either wired or wireless.


Portability More information
DACs and amplifiers can either be carried around or meant for static desktop use


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64 Audio

64 Audio U4s In-Ear Headphones - Open Box

Regular price $799
Sale price $799 Regular price $1,099.00

The 64 Audio U4s Open Box has been tested and inspected by our team and is in like-new condition. 

64 Audio is entering the $1099 price bracket with a phenomenal offering in the 64 Audio U4s in-ear headphone, 64 Audio's most affordable universal IEM to date.

The 64 Audio U4s in-ear monitor (IEM) is a 4-driver, hybrid IEM with a powerful Dynamic low-frequency driver that results in powerful punch in the low-end. The U4s is the perfect IEM for anyone looking for a rich, enveloping listening experience. The U4s has bass and treble extension in spades. Notes have a generous sense of weight to their transients due to the strong bass boost and thicker midrange.

The U4s also comes with 4 different tuning modules so you can tune them to your liking. The 64 Audio U4s offer's 64 Audio's MX, the new M12 (no longer packaged with U4s), M15 and M20 modules that will all make varying differences in how you experience the bass and treble on the U4s with the MX being the least amount of bass to the M20 being the most. Flexibility at your fingertips!

The 64 Audio U4s is our pick for the top IEM at the $1099 price category. There really is no competition.