FiR Audio

FiR Audio M4


M4: Mezzo Soprano

Beautiful vocals with well-balanced treble and bass to bring out the definition of audiophile music.

Engaging and musical tuning, the M4 pairs 4 drivers with FiR’s unique technologies to this end. Using a dynamic driver for well-extendedhighly textured lows, with 3 balanced armatures covering the midrange and high frequencies, tuned for a smooth, vast, and yet highly resolved sound signature. CombiningFiR's Direct Aperture design and the 3rd generation Atom pressure release system. The M4 gives the listener musical sound with an even larger soundstage and a pneumatic pressure-free listening experience suited for vocalists, keyboardists, guitarists, and audiophiles.


 System Format 4-driver hybrid
Driver Type

10mm dynamic driver

Balanced armature driver for Mids

Balanced armature driver for Hi-Mids

Direct Treble balanced armature driver

Frequency Response 10 Hz - 20,000 Hz
Nominal Impedance 6.4 Ohms
Connection (Universal Fit) MMCX female socket (Gold Plated)
Chassis Material (Universal Fit)

Sandblasted and anodised aluminum

CNC-machined from a single block

Colour (Universal Fit)

Black body

Champagne Gold faceplate 

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