64 Audio’s philosophy is to appeal to both professional audio engineers and passionate music lovers. The company strives to incorporate innovative technologies and the highest quality standards into its products to provide an exceptional listening experience.
The U4s is a technically enhanced version of the custom IEM A4s, which has been available for some time now and is a quad hybrid with four drivers. It benefits from the technology and innovations such as tia®, apex® and LID® that are also used in the manufacturer’s more expensive models.
The case of the U4s captivates with its matte grain blue and becomes a striking eye-catcher in combination with the black marbled faceplates. Golden accents can be added when selecting the Apex modules. Attenuators can be used to adjust both the outer isolation and the low bass level. Stronger isolation results in more intense bass. Included with the U4s for the first time are four such damping pieces: mX, m15, m20, and the new m12, which is exclusive to the U4s and provides additional tuning flexibility. Replacing the pre-mounted m15 (with 15 dB of external damping) with the m12 lowers the bass slightly.
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