Pro version of FiiO new FH5s earphones is here, the latest instalment in the FH series of hybrid IEMs by FiiO housing a powerful quad-driver configuration featuring 2 dynamic drivers and 2 balanced armature drivers, and now accompanied with the new LC-RC cable. It brings various upgrades over the veteran FH5 model such as all-new acoustic architecture, new driver config, TRISHELL design, replaceable termination plug option, and much more. Bring high-resolution sound clarity with ultimate detailing to your music with the latest FiiO FH5s. Latest Designed Quad-Driver Architecture FiiO FH5s features an all-new designed quad-driver architecture housing two premium dynamic drivers paired to dual high-performance balanced armature drivers for high-quality acoustic performance. The pair features a large 12mm beryllium-coated dynamic driver unit producing a deep, impactful lower end. Another 6mm beryllium-coated dynamic driver is responsible for smooth, transparent mid-frequencies. Treble frequencies are handled by Knowles TWFK-30017 dual balanced armature driver placed directly in the nozzle to provide a well-extended high-frequency response. Three Tuning Switches, Eight Sound Profiles FiiO FH5s features three tuning switches present on the earpieces. They allow for precisely tuning the sound output to meet more individual music preferences. Users can try eight different sound tuning options. The switches correspond to bass, mid, and treble frequencies. Professionally Designed Electronic Crossover FiiO FH5s features a professionally designed electronic frequency crossover to effectively reduce multi-driver distortion and present the users with clean and distortion-free sound output. The crossover works with respect to how each driver should focus on the different frequencies. Semi-Open Back Architecture The FH5s earpieces have a semi-open back architecture with a stunning grill design on the rear cavities. This semi-open back architecture maintains the air pressure balance between the cavities resulting in a huge soundstage and cleaner output. The FH5s employ TRISHELL “sandwich” structural design in their earpieces. They feature 5-axis CNC machined aluminium-magnesium alloy shells solidly fixed together with the body, and front covers at 3 points to greatly reduce excess resonance effect in the output High-Purity Litz-Type Braided Cable The upgraded PRO version of FiiO FH5s comes bundled with FiiO’s new high-purity silver-plated monocrystalline cable LC-RC cable – 8 strands of 19 cores each for a total of 152 wires. Each wire is individually isolated and all are braided tighter in Litz style. It has high-quality reliable MMCX connectors and swappable audio plugs, allowing you to freely switch between 3.5 standard as well as 2.5 and 4.4 balanced plugs to accommodate a variety of music sources. The outer sheath of the cable is made of environmentally friendly TPU material with a lustrous transparent black look.