Sennheiser IE 40 Pro VS Brise Audio Fugaku

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Super* Review original ranking

Super* Review Youtube Channel

Fugaku is a MEMS-powered IEM that wears its identity loud and clear: air—tons of it. The moment you hit play, you’re greeted by an open, shimmering atmosphere that screams treble authority. Measurements confirm a massive 15 kHz peak and another around 19 kHz, pushing extension nearly flat to 20 kHz. That’s MEMS magic—scary good, if slightly intimidating.

Tonally, Fugaku isn’t shy about its tuning. Vocals sit forward with a sweet, honeyed coloration—lush, expressive, and a little nostalgic. The upper mids peak just before 3 kHz, lending intimacy without aggression. It’s not “neutral” in the textbook sense; it’s flavored naturalness—an idealized realism that flatters everything from anime soundtracks to ballads. Think silky textures, warm hues, and that addictive “anime glow” of human tone—beautiful, not clinical.

Bass tilts warm and generous, led by a lifted upper-bass shelf that surpasses even JM1’s +8 dB Bass rise. It’s rich, cozy, and wraps the mix in warmth. Punch lands cleanly, though sub-bass depth depends on the source—Linn Selekt brings satisfying rumble, while leaner amps like Covert-2 sound clearer. The warmth bleeds tastefully into the mids, tying the whole presentation together.

Verdict: Fugaku isn’t about neutrality—it’s about immersion. Air for days, syrupy mids, and a weighty warmth that flatters vocals. Demanding on source, yes, but in the right chain, it’s mesmerizing—a MEMS showcase that turns treble brilliance into emotional theater.

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Fox Told Me So original ranking

Fox Told Me So Youtube Channel

Cutting edge tech and innovation Lacks slam on 808 drops. Cannot be EQ'd to do otherwise. Is a crippling handicap for people with Hip hop and EDM trance libraries.

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Bad Guy Good Audio original ranking

Bad Guy Good Audio Youtube Channel

World-class bass dynamics and slam. Coherent and fleshed out soundstage. Full-bodied notes. Slightly relaxed treble and lower mids. Upper mids slightly forward. Cons: Price, requires proprietary energizer.

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Smirk Audio original ranking

Smirk Audio Head-Fi Profile

The Brise Audio Fugaku represents a radical departure from conventional IEM design, functioning as an integrated portable audio system rather than standalone earphones. Its core innovation lies in relocating the entire active crossover network to an external dedicated amplifier, bypassing traditional passive filters housed within earpieces. This architecture enables direct driver amplification via a proprietary 7-pin cable and multi-amp configuration, theoretically minimizing signal degradation and distortion.

Sonically, the system delivers an expansive, speaker-like presentation with exceptional micro-detail retrieval and separation, particularly in vocals and treble regions. The tuning leans neutral-bright with a gentle W-shape, featuring controlled bass that extends deeply without overwhelming midrange clarity. However, its extreme resolution and transient speed can create listener fatigue during extended sessions, while the proprietary ecosystem limits compatibility with third-party sources or cables.

Practical compromises emerge in portability due to the mandatory amplifier and dual-device stack (DAP + amp), alongside a six-hour battery life that necessitates frequent charging. The titanium earpieces offer secure fit via integrated TPE ear hooks, but the non-standard cable termination eliminates aftermarket cable options. While the system achieves remarkable technical performance, its astronomical price positions it as a niche solution for uncompromising enthusiasts willing to trade convenience for fidelity.

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