2 Years Local Warranty. Any mention of "us," "we," "our," etc is by 64 Audio, not AV One. Fourté is the pinnacle of in-ear monitor technology. With its entire design being made up of industry firsts, Fourté isn’t just a four-driver hybrid UIEM. The innovations of acoustically shaping micro-chambers, direct radiating drivers, and the single sound bore come together in our patented tia technology. Fourté is our first IEM to feature internally integrated patented apex technology. These along with its ergonomic shell, machined out of solid aluminum, have dictated our entire UIEM design language since its development in 2016. The black anodised aluminium shell is topped off with a copper colour anodised aluminium faceplate and a beautifully aged copper faceplate chip; each one developing a truly unique patina pattern making sure that no two Fourté are alike. Fourté’s unique drivers, acoustic chambers, integrated apex technology and passive radiator all unite delivering an unrivalled sonic experience. The level of detail retrieval coupled with its “out-of-head” sound-stage and deep reaching bass reanimate well-recorded music; putting its resolving capabilities at the level of some of the world’s greatest audiophile systems. Featured Technology tia Tubeless In-Ear Audio (tia) is a patented IEM design methodology that aims to reduce unwanted resonance and distortion for a transparent and lifelike sound signature. The tia system is comprised of three major elements: open balanced armature tia drivers, the tia single-bore design, and tia acoustic chambers. Fourté utilises the complete Tia system; its four drivers radiate freely into the Tia bore with no obstructions to the drivers. Apex Air Pressure Exchange (Apex) is a patented vent that releases air pressure in a sealed ear canal all while retaining standard IEM levels of isolation; enabling music enthusiasts to listen more comfortably for longer. This venting alleviates listener fatigue and allows for a much more realistic soundstage. Apex is integrated in Fourté all the way down to the way the shell is milled, offering similar pressure release and isolation to our m20 module. Specifications 1 tia High Driver – 1 High-Mid Driver – 1 tia Mid Driver – 1 Dynamic Low Driver 5hz – 22kHz Frequency Response 114dB Sensitivity @1kHz @1mw Integrated 4-way Passive Crossover 10Ω Impedance @1kHz -20dB Internal Apex Technology 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 Included Fourté 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 Cleaning Tool Cable Clip Round Sticker Designed, Assembled, and QC’d by highly skilled technicians in the United States using components sourced both domestically and globally from trusted suppliers.
