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-extended, highly textured lows, with 3 balanced armatures covering the midrange and high frequencies, tuned for a smooth, vast and yet highly resolved sound signature. Combing FiR'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.
ONE for ALL：Direct Aperture Acoustics, DAA
The drivers in each FiR Audio earphone is placed as close to the ear as possible, feeding sound waves directly into the ear canal and ensuring a purer sound.
Direct Bore is a Subset of Direct Aperture Acoustic, where the IEM’s balanced armature drivers are pointing directly to the earphone’s bore. A spout directing sound to the ear canal is a constant in classic BA driver designs. The drawback of this traditional design, however, is that it prevents sound from expanding naturally, resulting in muffling and distortion. FiR Audio’s Direct Treble driver offers a solution to this by removing the spout, widening the aperture on the driver and allowing more air through—negating any harshness or muffling and resulting in a more natural, organic sound. These Direct Treble drivers harmonise with the other Drivers within the chassis, giving the M Series a natural, organic signature as compared to its counterparts.
FiR Audio ATOM module. Also known as the Air Transferring Open Module, is a pressure release system developed by Bogdan Belonozhko following experimentation with a variety of nano-thin membranes and foam materials. FiR’s ATOM has a significantly reduced filter size, allowing its IEMs to be less affected by air volume within the module while allowing for a positive effect on sound presentation, widening the soundstage while helping to alleviate listener fatigue.
An extension of FiR’s Audio’s Direct Aperture Acoustics, the M-Series’ Tactile Bass technology allows bass to go beyond simply being heard. This is done by using the earphones’ entire chassis as a transducer, creating a rich, full resonance and giving the listener a bass experience they can physically feel.
Custom IEM Price：
HK $15,800 up ; HK $16,880 up w/ ATOM-X
*3 Year Warranty on RCX and 2-PIN; 1 Year Warranty on MMCX.
1. Please confirm your payment and fill in the order form afterwards
2. Order ear molds at hearing center:
Ear Impression will be included. Customers are required to get the impressions at our appointed hearing centre and the order card must be presented.
NP Mall will collect the ear impressions at our appointed hearing center. Customers are required to deliver their impressions from hearing centers which are not appointed by NP Mall.
3. Standard manufacturing process takes around 6-8 weeks, depending on the situation.
Driver 1: 10mm Dynamic for Low
Driver 2: BA for mid
Driver 3: BA for mid/high
Driver 4: BA for high
Sensitivity: 114 dB @1kHz
Impedance: 6.4 Ohms
Frequency Range: 10 - 20000 Hz
Connection (earphone end; universal fit: MMCX female socket (Gold Plated)
Cable: Silver Plated Copper OFC cable