Headphones & IEMs

The Fourté is 64 Audio's long-running flagship universal-fit hybrid IEM, combining the brand's proprietary tia (tubeless in-ear audio) high-frequency driver technology with a dynamic low driver, and has remained the company's top-selling flagship model since its 2016 debut, with subsequent special editions (Noir, Blanc) built on the same platform.

Fourté Blanc is a universal-fit four-driver in-ear monitor made by 64 Audio, with one tia high driver, one high-mid driver, one tia mid driver, and one dynamic low driver. It uses a fully tubeless tia single-bore design, an integrated four-way passive crossover, internal Apex pressure-relief technology, 5 Hz–22 kHz frequency response, 114 dB sensitivity, and 10 Ω impedance at 1 kHz. The shell is T6061 Kaiser aluminum with a white ceramic coating, and the low-driver wiring uses 27-gauge Cardas Grade 1 ultra-low-eddy copper with Mundorf Supreme solder.

The 64 Audio Nio is a universal hybrid in-ear monitor positioned at the lower-priced end of 64 Audio’s universal IEM line. Its design combines a blue abalone faceplate with 64 Audio’s interchangeable apex ventilation modules: m15, m20, and mX, which vary the balance between isolation, bass impact, soundstage, and dynamics. The Nio has a warm, musical, broadly balanced tuning with tight punchy bass, excellent subbass extension, natural vocal and acoustic-instrument timbre, detailed mids, and slightly bright treble.

The 64 Audio Ocean is a flagship universal in-ear monitor (UIEM) featuring a six-driver, four-way configuration with two custom dynamic drivers in a true isobaric arrangement, three balanced-armature drivers for the mid and high-mid frequencies, and a patented tia high-frequency driver with tia waveguide. Its passive acoustic control system provides four interchangeable back-vent filters for approximately 8 dB of low-frequency sensitivity adjustment and a removable stainless-steel high-frequency screen, enabling 32 configuration combinations. Specifications include a 5 Hz–22 kHz frequency response, 9.5 Ω impedance, 103.7 dB/mW sensitivity at 1 kHz, an integrated four-way passive crossover, and a 0.78 mm 2-pin silver-plated UP-OCC copper Litz cable.

Solo is a universal-fit in-ear monitor made by 64 Audio, using a single 14.2 mm planar magnetic driver with a 20 Hz–20 kHz frequency response, 16 Ω impedance, 100 dB/mW sensitivity at 1 kHz, and −12 dB isolation. Its acoustic chamber incorporates dual Helmholtz resonators, apex core pressure-relief technology, a single-bore design, and patented Linear Impedance Design (LID) circuitry. The housing is listed as a T6061 aluminum shell with a copper faceplate mesh, and it includes 3.5 mm and 4.4 mm OCC copper eight-braid cables.

64 Audio TWELVE Ti is a limited-edition universal in-ear monitor based on the U12t configuration, using a Tc4 titanium shell, faceplate, and Apex m20 module. Its topology comprises one tia high driver, one high-mid driver, six mid drivers, and four low drivers with an integrated four-way passive crossover, incorporating apex, tia, and LID technologies. Specifications include a 10 Hz–20 kHz frequency response, 108 dB sensitivity at 1 kHz/1 mW, 12.6 Ω impedance at 1 kHz, and Apex isolation of -10 dB to -20 dB; supplied cables use 0.78 mm 2-pin connectors and silver-plated UP-OCC copper conductors.

A 12-driver universal-fit in-ear monitor built on 64 Audio's tubeless tia design, with Apex pressure-relief modules and Linear Impedance Design circuitry. Machined T6061 aluminum shells with an electroformed stainless steel faceplate.

64 Audio U18s is a universal in-ear monitor featuring 18 balanced-armature drivers, including a tia driver positioned in the nozzle. It uses interchangeable apex modules, with MX and M20 included and M15 preinstalled, along with LID technology and TrueFidelity and SpinFit eartips. The package includes an eight-braid Premium “Silver” cable made with pure silver-plated OFC wires, rated at 0.28 ohm total impedance.

The 64 Audio U4s is a universal-fit in-ear monitor with a quad-driver hybrid topology: one dynamic low driver, one mid driver, one high-mid balanced-armature driver, and one tia high driver. Its anodized aluminum shell incorporates tia, Linear Impedance Design (LID), Apex venting, and an integrated four-way passive crossover with an electrical low-pass filter; included Apex modules provide m20, m15, and mX isolation options. It has a 10 Hz–20 kHz frequency response, 107 dB/mW sensitivity at 1 kHz, and 11 Ω impedance at 1 kHz, and includes a 3.5 mm cable made with silver-plated OCC copper wire.

The AB-1266 Phi TC is Abyss Headphones' open-back planar magnetic flagship, hand-built in the USA by JPS Labs with a CNC-machined all-aluminum frame finished in a two-tone polymer-ceramic coating. It succeeded the original AB-1266 Phi with newly designed 66 mm planar drivers, credited by the manufacturer as delivering the highest resolution of any headphone it has made.

AKG's open-back reference with a 53mm dynamic driver and 1.5-Tesla magnet system, originally engineered in Vienna for studio mastering use.

The Audeze CRBN is an electrostatic headphone using a patent-pending polymer film with suspended carbon nanotubes. The diaphragm technology was originally developed for MRI medical applications and adapted for audiophile use.

The Audeze CRBN 2 is a high-end electrostatic headphone featuring second-generation carbon-nanotube electrostatic drivers. It is designed for tactile bass response and holographic spatial imaging within the electrostatic headphone category.

Audeze Euclid is a closed-back in-ear monitor using a single extra-large 18 mm planar-magnetic driver without crossovers. Its housing combines precision-milled aluminum with carbon fiber in a lightweight, smoothly contoured design. The earphone is specified at 105 dB/mW efficiency and a maximum SPL exceeding 120 dB.

The Audeze LCD-3 is an over-ear, open-back planar-magnetic headphone using 106 mm ultra-thin diaphragms, a proprietary stacked magnet array, Fazor phase management, and Neodymium N50 magnets. It has a 110-ohm impedance, 101 dB/1 mW sensitivity, 10 Hz–50 kHz frequency response, less than 0.1% THD at 100 dB, and a 635 g weight. The headphone is designed for use with high-quality vacuum-tube or solid-state headphone or integrated amplifiers and features handcrafted zebrawood rings, premium earpads, and a ventilated suspension headband.

The Audeze LCD-4 is an over-ear, open-back planar magnetic headphone with 106 mm transducers, a Double Fluxor™ neodymium N50 magnet array, Fazor phase management, and Nano-Scale Uniforce™ diaphragms. It has a 200-ohm impedance, 97 dB/1 mW sensitivity, 5 Hz–50 kHz frequency response, <0.1% THD at 100 dB, and 690 g weight. The headphone is rated for 5 W RMS maximum power handling, with a minimum power requirement above 100 mW and a recommended power level above 500 mW.

The Audeze LCD-4z is a high-end headphone designed to operate from almost any device without a dedicated headphone amplifier. It uses Audeze’s thinnest driver film, a double Fluxor™ magnetic array, and a magnesium chassis that is over 20% lighter than the previous design.

Audeze's flagship open-back planar magnetic headphone with a 90 mm Nano-Scale Parallel Uniforce diaphragm, Fluxor magnet array and Fazor waveguides. At 420 g it is markedly lighter than the LCD-4 it replaced.

Audeze's flagship open-back planar magnetic headphone with a 90 mm Nano-Scale Parallel Uniforce diaphragm, Fluxor magnet array and Fazor waveguides. At 420 g it is markedly lighter than the LCD-4 it replaced.

The Audeze LCD-MX4 is a professional over-ear headphone for studio and home listening. It combines technologies from Audeze’s Flagship Series with the driver design used in the LCD-X, emphasizing accurate reproduction, detail retrieval, and sensitivity.

The Audeze LCD-R is a high-end planar-style headphone developed in collaboration with Schiit and inspired by the Jotunheim-A current-drive headphone amplifier. It uses a 2-ohm driver employing Audeze’s patented Parallel-Uniforce technology; Audeze refers to the driver as a Ribbon because of its extremely low impedance and over 98% trace coverage of the diaphragm surface.

Studio-standard planar magnetic with a 106mm driver and low 20-ohm impedance, common in mastering suites. The 2021 revision flattened the frequency response.

The Audeze LCD-XC is an over-ear, closed-back planar-magnetic headphone designed for professional monitoring and audiophile systems requiring isolation. It uses 106 mm planar drivers with Ultra-Thin Uniforce™ diaphragms, Fazor™ waveguides, a proprietary magnet array with Neodymium N50 magnets, 20-ohm impedance, and a frequency response of 10 Hz–50 kHz. The headphone has a 677 g weight, 100 dB/1 mW sensitivity, less than 0.1% THD at 100 dB SPL, and includes a braided OCC copper cable with a 4-pin XLR connection and single-ended 1/4-inch adapter.

The Audeze LCDi4 is an open-back in-ear headphone designed for high-resolution audio reproduction. It uses the same Nano-Scale Uniforce diaphragm as the LCD-4 and LCD-4z, paired with a Fluxor magnet array.