FiiO FH19 Key Features 
Heavy-Duty Construction: The FiiO FH19 incorporates a Titanium midframe and a 700 series aluminum shell. This combination provides durability, corrosion resistance, and a stylish appearance that will last, while still providing wearing comfort. 

Driver Configuration:

Four-way Acoustic Design:

S.Turbo Patented Acoustic Design: FiiO's patented S. Turbo design enhances bass performance through a turbine-shaped structure, while filtering out excess mid-to-high frequencies for a more powerful and robust sound.

Swappable Audio Filters: The FH19 comes with three pairs of swappable audio filters. Each filter has different internal damping and mesh density, allowing you to adjust the sound profile of the FH19, according to your personal preference.

The Red audio filter enhances low frequencies for better bass.
The Black audio filter provides a balanced sound that is clear and transparent.
The Green audio filter supports refined and detailed treble.

BASIC SPECIFICATIONS

• Earphone type: Dynamic-balanced armature hybrid in-ear monitors
• Wearing method: Around-the-ear in-ear monitors
• Drivers per ear:
• Push-pull dynamic drivers set x 1, totaling 2 drivers
• Custom Knowles enhanced mid-frequency balanced armature x 2, totaling 4 drivers
• Knowles SWFK treble balanced armature x 1, totaling 2 drivers
• Frequency response: 8Hz-40kHz
• Impedance: 16Ω@1kHz
• Sensitivity: 109dB/mW@1kHz
• Cable type: 8 strands totalling 224 wires of high-purity pure silver
• Cable length: About 1.2m
• Ear unit weight: About 12g (excluding cable)
• Earphone connector: Expanded MMCX
• Audio plug: Straight twist-lock swappable

PARTS LIST

• HS20 silicone ear tips x 3 pairs (S/M/L)
• HS18 ear tips x 3 pairs(S/M/L)
• SpinFit ear tips x 3 pairs (S/M/L)
• Foam ear tips x 2 pairs (M)
• Bass ear tips x 3 pairs (S/M/L)
• Balanced ear tips x 3 pairs (S/M/L) (M size pre-installed)
• Vocal ear tips x 3 pairs (S/M/L)
• Dual-flange ear tips x 2 pairs (M)
• HB7 carrying case x 1
• Cleaning brush x 1
• MMCX quick release tool x 1
• Magnetic cable clip x 1
• Red/black/green audio filters x 1 set
• Pure silver swappable plug earphone cable x 1
• 3.5/4.4mm swappable plugs x 1 (4.4mm pre-installed)