Pros: Organic & Resolving, Top Clarity, Massive Extension
The Final Audio Design FI-BA-SS is the flagship model of the Heaven Series. Like other iems in the Heaven Series, it utilises a single balanced armature driver. On the website, it states “Our Flagship BA-SS takes balanced armature earphones to another level of performance”. With only a single balanced armature driver, it is hard to imagine the level of sonic performance that the FI-BA-SS can produce.
“With our 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 our flagship model of the BA series and our premium model in the Balanced Armature category.”
Final Audio Design has incorporated Balanced Air Movement (BAM) technology in the FI-BA-SS. This allows the sound to be projected out from the single balanced armature driver effortlessly. The main purpose of utilising a single balanced armature driver is to control all the frequencies and ensure coherency at its best. The presentation will be clear cut and straightforward to the listeners. The combination of technicality and musicality has reached a pinnacle in the case of the FI-BA-SS.
Housing: Stainless steel
Driver Unit: Balanced Armature Driver
S.P.L: 112 dB
Impedance: 16 ohm
Length of Cable: 1.4 m
Weight: 20 g
The build quality on the shell of the iem is fantastic. The cable is decent but more is expected given the price tag of it.
With Size M Spinfits
The FI-BA-SS has a special sound that no IEMs can replicate. It is hard to describe the sound of the FI-BA-SS. The sound has multiple characteristics to it. Organic, Resolving, Technical and more. Sophisticated or complicated the sound of the FI-BA-SS may be that it is difficult to reach a perfect description. Hence, a detailed explanation is needed. The FI-BA-SS offers an insane amount of extension at the opposite ends of the frequency. No words can describe the resolution and refinement of the FI-BA-SS. It is a very revealing iem that presents everything effortlessly. The FI-BA-SS is bright sounding and the mids are prominent. There are hardly any veils in the sound. Transition from other iems to FI-BA-SS makes it seems that multiple veils are being lifted. That is the sonic prowess of the FI-BA-SS. As straightforward as you can get from the sound, the FI-BA-SS excels in being “honest” in giving a raw sound to the listener. Clarity is very impressive. Details retrieval is on point. There is a decent bass to the sound coupled with the developing treble that enhances the whole listening experience.
The standout for me is the splendid midrange. The prominent mids’ purity exemplifies the raw and organic sound of the FI-BA-SS, making it one of the best iems for the vocals genre in the market at the moment. Free of colouring and distortions, the sound reproduced is just too transparent and allows the listener to be immersed in the tracks. The single driver implementation proves its sonic capability. It reveals everything effortlessly. The soundstage is very wide for an iem. Engaging presentation allows the vocals to be portrayed live to the listeners.
Lows (9/10): The bass is perfect as you can listen to every single variations. There is no slam to it but just a consistent and coherent presentation. It is certainly not the type of bass that bassheads crave. However, the accuracy and tightness of the bass is right there and is comparable to multiple balanced armature drivers iems. The lows of the FI-BA-SS is really impressive. You need to listen to the FI-BA-SS to accurately understand what the lows is all about as words can only describe it to a certain extent.
Mids (10/10): The mid range is my favourite part. Mids are straightforward and detailed. The FI-BA-SS shines on the vocals tracks. Vocals are cut through to the listener and the highly energetic sound makes females vocals sweet. Instruments sound particularly impressive. With the airiness and spaciousness, the sound is developing slowly to reach a high resolving nature. The mids are fantastic in how it presents itself. Coherent, clear, engaging, organic, addictive, resolving etc. There are far too many adjectives to describe it. It is in another league.
Highs: (9/10): The highs are very bright and this shows the extension of it. However, it can reach an extent of being sibilant. In all honesty, that is the only flaw across the whole spectrum.
The FI-BA-SS from Final Audio Design shows exactly what a single balanced armature driver can do. Coherency is one of the best I have heard from an iem. Phenomenal sound with a huge price tag. This iem is too unique an iem to pass.