Final Audio FI-BA-SS Balanced Armature IEM

  • Eliminating compromise in the pursuit of ideal sound, the FI-BA-SS is handcrafted by Japanese engineers.

    With Final's special "BAM Mechanism" design, air movement inside the housing is optimized, allowing the BA-SS to produce deep bass without the distortion and muddiness normally reproduced by BA unit earphones. The design theory of this breakthrough earphone rests on a single driver directly connected to the circuit uncomplicated by the presence of other drivers.

    The BA-SS is a handmade product, made by Japanese sound engineers with a full-focus on ideal sound with no compromises. This is Final Audio's flagship model of the BA series and is their premium model in the Balanced Armature category.

    BAM mechanism produces bass sounds and stereo spatial interpretations

    With balanced armature driver units, iron is driven to produce sound, and as such, these drivers face a number of problems, amongst which are "proving tiring to listen to", "having sound that is subtle and beautiful, but lacking in depth and being flat" and "lacking bass interval". At final, they have decided to focus on developing technology for the reproduction of bass tones and three-dimensional space with the full-range reproduction of a theoretically unproblematic single driver unit, rather than taking things in a multiway direction.

    They went back to the beginning and reviewed the performance of the balanced armature driver, focusing their attention on something they had previously overlooked: airflow inside the housing. Final developed BAM (Balancing Air Movement), a mechanism that optimizes airflow inside the housing through the creation of an aperture in the driver unit, which is usually sealed.

    While achieving bass tones and deep, three-dimensional spatial representation, which proved difficult with single driver full-range reproduction, they achieved a BA type that at the same time made for natural listening the user doesn't tire of.

    Original balanced armature driver unit

    Since the BAM mechanism optimizes the flow of air within the housing, according to our own unique specifications, an opening has been established on the back of the driver unit, which is usually closed.

    Highly rigid machined stainless steel housing

    There are five pieces per side to the housing, which has been machined from stainless steel. In the pursuit of the ideal BAM mechanism, special care has been taken even with the parts of the housing you can't see, every part of which has been created using extremely complex manufacturing processes. Usually the cable Final employed a collet chuck to secure the cable, so that the air flow through the inside of the housing is not compromised. The high-precision processes used even in such hidden aspects of the product support FI-BA-SS's outstanding sound quality.

    Original clear earpieces: five sizes to choose from

    Comes with two types of ear pieces. The E type ear pieces employ two types of silicon differing in rigidity for the sound conduit and for the earbud that comes into contact with the user's ear. The silicon used for the sound conduit is more rigid than that used for the earbud, and by having groove processing applied to it, combines both strength and flexibility.

    It fits itself to the shape of the user's ear while maintaining its form. Soft silicon has been employed for the earbud, making for a comfortable fit and a high level of sound insulation. The 5 sizes SS/S/M/L/LL of E type ear pieces are joined by the C type ear pieces (3 sizes) which differ in terms of bass reproduction and how airtight they are.

    Original Cable

    An original flexible cable that suppresses touch noise.

    BAM vent that allows for both the control of airflow and to prevent sound leakage

    A BAM vent has been established on the back of the housing to allow for both the control of airflow and to prevent sound leakage.

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