Features:- >Four-Driver Hybrid Configuration. >10mm Carbon-Based Diaphragm Dynamic Driver. >High-Performance Knowles Balanced Armature Drivers. >Exquisite CNC Machined Aluminum Alloy Cavities. >Notch Filter Technology. >Patented S. Turbo Design. >High-Purity Silver-Plated Monocrystalline Copper Cable. >Swappable Termination Plugs(3.5mm/4.4mm). >Swappable Tuning Filters. >Premium HS18 Ear Tips. Technical Specifications:- >Driver Config: 1DD+3BA. >Frequency Response: 10Hz-40kHz. >Connector Type: Expanded MMCX. >Sensitivity: 112dB. >Impedance: 16Ω. >Weight: Approx 6.6grams(only single earpiece). —SpecificationsSplit— FiiO FH15 is a brand new four-driver hybrid set of in-ear monitors designed with a composite carbon-based 10mm dynamic driver and three high-performance balanced armature drivers from Knowles. With a custom notch filter design, FiiO FH15 delivers a richer sound with lusher vocals and denser instruments, the overall experience is pleasant to listen to. FiiO has adjusted the tuning of the FH15 to reboot your experience and deliver a properly balanced sound frequency response. FH15 comes with three sets of tuning nozzle filters that allow you to easily adjust the output more to your liking!! Fiio FH15 brings you an exceptional experience allowing you to enjoy different genres of music well!! Powerful Performance With four-Driver Hybrid Configuration:- Fiio has implemented a four-driver hybrid configuration for the FH15. The pair houses a 10mm custom-developed dynamic driver that features a lightweight and solid carbon-based composite diaphragm coil. This DD unit is paired with three high-performance balanced armature drivers from Knowles for great resolution and clarity. The four drivers work cohesively bringing a powerful sound to the listeners. Three-Way Frequency Crossover:- The drivers are arranged in a three-way frequency crossover for smooth performance with lower distortion in the output signal. The DD driver delivers a powerful, deep-hitting bass response which gets complemented by a custom Knowles ED for the midrange and two Knowles RAD drivers for the high-frequency band. Exceptional Sound With S.Turbo Patented Design & Notch Filter Technology:- With the help of FiiO’s self-developed and patented S.Turbo patented acoustic tube design, FiiO FH15 delivers enhanced bass response with a solid, deeper lower-end response. The pair also adopts Notch-Filter technology for smoother treble with a richer, lusher midrange. Adjustable Tuning With Tuning Nozzle Filters:- FiiO FH15 allows the users to adjust the output more to their liking. The pair brings adjustable tuning with the help of replaceable nozzle mouth filters. With different densities for the nozzle mouth filters, FiiO has achieved this. Fh15 comes with three sets of nozzle filters(bass/treble/balanced sound). Premium CNC Machined Aluminum Alloy Build:- FiiO has carefully designed the ear cavities of FH15 with a high-precision CNC machining process. The cavities are made up of premium-quality aluminum alloy material. The shell looks rich and has a premium in-hand feel. FiiO has designed them in an ergonomic shape and lightweight design promising a comfortable fit. High-Quality Sound With Premium Stock Cable:- In order to deliver top-quality sound performance, FiiO FH15 comes with a premium quality stock cable. This 152-core wire is crafted using silver-plated monocrystalline copper cores. It adopts expanded MMCX connectors and features a swappable termination plug, bringing 3.5mm and 4.4mm plugs in the package for you to use as per your requirement.