The 64 Audio U4s is a quad driver hybrid UIEM, featuring ground-breaking patented technologies originally developed for their flagship products in order to bring a wider audience closer to their music. The U4s explores a bold new color aesthetic for 64 Audio. The Slate Blue shell color was influenced by some of the world’s most beautiful blue-dial timepieces while the unique faceplate pattern is inspired by Muonionalusta meteorite fragments. Both the faceplate and shell’s illuminant properties give it a unique tone in varying lighting conditions.

The U4s sounds light on its feet while effortlessly delivering physically engaging sub-bass without bleeding into the mid-bass. Balanced mid frequencies and a pleasant high-mid band respond well to a wide array of music and recording styles at every volume level; present but not fatiguing. The tia high-driver’s open airy quality couples with the extended sound-stage provided by apex for a lifelike sonic experience.

Its ergonomic anodized aluminum shell houses a single dynamic driver, two balanced-armature drivers, and one patented tia driver; all weaved together with 64 Audio's patented Tia, LID, and Apex technology. The four-way crossover is elevated with the use of a proprietary electrical low-pass filter; reducing low-frequency distortion. The assortment of included apex modules and ear tips are an invitation to further shape the sound based on preference and source material, while the ultra-low impedance premium silver-plated copper cable ensures unimpeded signal transmission. The dissemination of tia technology within their product range, brings that classic 64 Audio sound signature to a new price-point.

What's Included:

• U4s Universal In-Ear Monitors
• 64 Audio Premium Leather Case
• TrueFidelity Foam Ear Tips (S,M,L)
• SpinFit Silicone Ear Tips (S,M,L)
• Silicone Ear Tips (S,M,L)
• 3.5mm Black Premium Cable
• Apex Modules: m20, m15, mX
• Cable Clip
• Cleaning Tool
• Round Sticker

Specifications

• Driver Configuration: 1 tia High Driver – 1 High-Mid Driver – 1 Mid Driver – 1 Dynamic Low Driver
• Frequency Response: 10hz – 20kHz
• Sensitivity: 107 dB/mW @ 1kHz
• Crossover: Integrated 4-way Passive
• Impedance: 11Ω @1kHz
• Apex Technology Isolation: -20dB, -15dB, -10dB
• Black Premium Cable: 0.23 Ohms Total Impedance, 7 x 7 x 4 Multi-Twist, Silver Plated OCC Copper Wire, 26 AWG, Terminated in 3.5mm