Measurements by Hangout.Audio The World’s Flattest In-Ear Monitors. Purpose-built for absolute neutrality, the CrinEar Reference is a precision-engineered in-ear monitor designed to deliver true reference-grade sound. Tuned to a −1.0 dB/octave population-averaged diffuse field target and verified under ITU-T Type 4.3 conditions, the Reference achieves exceptional tonal accuracy, balance, and transparency; making it ideal for critical listening, studio monitoring, and mix evaluation. At its core is a 2DD + 3BA hybrid driver system, featuring a Horizontally-Opposed Dual Woofer System (HODWS) for clean, controlled bass with reduced distortion, paired with balanced armatures for precise midrange and extended treble detail. A 5-axis CNC-machined aluminium shell offers durability, acoustic stability, and a contoured pseudo-custom fit for long-term comfort. A benchmark for a new age. The Reference. What You Get CrinEar Reference IEM (2DD + 3BA) Detachable 2-pin silver-plated copper cable Interchangeable 3.5mm single ended and 4.4 balanced connectors for universal compatibility 3 pairs of "standard bore" silicone tips, 3 pairs of "shorter bore" silicone tips, and 4 pairs of shortwide silicone tips in variety of sizes (XS/S/M/L) + 1 pair of M-sized foam tips Premium leatherette zip case Specs Driver configuration: 2DD (HODWS) + 3BA Impedance: 16Ω @1kHz Sensitivity: 104dB/mW @1kHz Frequency Response Range: 2Hz ~ 44,000Hz Nozzle Width: 6.0mm (lip) Cable Material: Silver-plated Copper
