Sennheiser IE900 VS Brise Audio Fugaku

IEM Comparison: Expert & Community Scores Side-by-Side

Home Ranking Compare IEMs
My Ranking My Favorites

Sennheiser IE900 and Brise Audio Fugaku use 1DD and 2DD+5BA+1MEMS driver setups respectively. Sennheiser IE900 costs $1,500 while Brise Audio Fugaku costs $16,999. Brise Audio Fugaku is $15,499 more expensive. Brise Audio Fugaku holds a decisive 1.3-point edge in reviewer scores (7.8 vs 9.1). Sennheiser IE900 has significantly better bass with a 1.3-point edge, Brise Audio Fugaku has significantly better mids with a 3.4-point edge, Brise Audio Fugaku has significantly better treble with a 2.7-point edge, Brise Audio Fugaku has significantly better dynamics with a 3-point edge, Brise Audio Fugaku has significantly better soundstage with a 2.4-point edge, Brise Audio Fugaku has significantly better details with a 2.1-point edge and Brise Audio Fugaku has significantly better imaging with a 2.5-point edge.

Insights

Metric Sennheiser IE900 Brise Audio Fugaku
Bass 10 8.8
Mids 5.5 8.9
Treble 6 8.7
Details 7 9.1
Soundstage 7.5 9.9
Imaging 6 8.5
Dynamics 6.5 9.5
Tonality 6.5 8.8
Technicalities 6.6 9.2

Sennheiser IE900 Aggregated Review Score

Average Reviewer Scores

Crin
Jaytiss Precogvision
Audionotions Head-Fi.org
Super* Review

Average Reviewer Score:

7.8

Strongly Favorable

Brise Audio Fugaku Aggregated Review Score

Average Reviewer Scores

Bad Guy Good Audio Smirk Audio Precogvision
Fox Told Me So Web Search

Average Reviewer Score:

9.1

Outstanding

Reviews Comparison

Sennheiser IE900 reviewed by Precogvision

Precogvision 7 Reviewer Score
A- Tuning
B+ Tech
Excelllent bass - simply excellent. Midrange could use some work, as could the generally average imaging chops.

Precogvision original ranking

Precogvision Youtube Channel
Bass: S+ Mids: C+ Treble: A- Dynamics: A- Details: A- Imaging: B

Buy Sennheiser IE900 on audio46

Ad
Using this affiliate link for ordering your Sennheiser IE900 or any other IEM helps fund our free service at no extra cost to you.

Price: $1,326

Buy Sennheiser IE900 on audio46

Brise Audio Fugaku reviewed by Precogvision

2025-09-17
Precogvision 8.7 Reviewer Score
S- Tuning
S Tech
YouTube video thumbnail
World-class bass with incredible depth and dynamics. Held back by a slightly unrefined treble response.
Youtube Video Summary

Brise Audio Fugaku stands out immediately for its bass: incredibly deep, dynamic, and explosive, with attacks that feel like notes appear from thin air and a tight, non-lingering decay. It’s the kind of presentation that can be called best-in-class bass for any IEM, a must-hear experience even if the overall package doesn’t justify its $16,000 price tag.

Beyond the low end, the tuning falls into a Harman-esque mold—a clean midrange with a 3 kHz pinna region and a slightly elevated 3–5 kHz—while the treble carries extra energy, especially past 15 kHz. Those highs arrive with multiple distinct peaks that aren’t the most refined; they can overlap and create auditory masking, subtly shaving perceived micro-detail. In short: a technically solid, relatively conventional mid/treble wrapped around an absolutely world-class bass that steals the show.

Bass: S+ Mids: A+ Treble: A+ Dynamics: S+ Details: S Imaging: A+

Precogvision original ranking

Precogvision Youtube Channel

Sennheiser IE900 (more reviews)

Sennheiser IE900 reviewed by Super* Review

Super* Review 9* * score rescaled + normalized
check links for more info:

Super* Review original ranking

Super* Review Youtube Channel

Sennheiser IE900 reviewed by Audionotions

Audionotions 8.5 Reviewer Score
I usually don't like things that aren't all rounders but this might be the exception. Bass is incredible - best in class - great texture, fantastic physicality. Treble response is great too - pretty resolving. There is a noticeable recession in the upper mids, giving these a fairly U/V shaped sound signature - violins, for example, lack a bit of brightness/bite that I would hope for. But unlike other V-shaped IEMs, the mids aren't offensive. Incredibly fun to listen to. Probably the best single DD available. EQ highly recommended. Previously Owned

Audionotions original ranking

Website (Audionotions)

Sennheiser IE900 reviewed by Jaytiss

Jaytiss 7.1 Reviewer Score
B Tuning
C+ Tech
I don't get it, not even a little.

Jaytiss original ranking

Jaytiss Youtube Channel
Mids: B Treble: C+ Dynamics: B Soundstage: A

Sennheiser IE900 reviewed by Crin

Crin 6.5 Reviewer Score
B Tuning
A+ Tech
YouTube video thumbnail
Well-resolving DD IEM with excellent treble control, though with somewhat weak mid-high harmonics.
Youtube Video Summary

Sennheiser’s IE900 delivers a sub-bass–focused tuning with tight control and real tactility, but its trademark upper-mid recession (≈2–5 kHz) keeps vocals and instruments a step back. A pronounced 9–10 kHz lift adds sparkle and air; depending on tolerance, that energy can read either engaging or a touch sharp/sibilant. Technical chops are strong for a single DD—resolution and microdetail are genuinely competitive.

The sticking point is tonal balance and value. While the IE900 is refined and punchy, that blunted midrange character contrasts with its bright treble, creating a love-it-or-leave-it “blue cheese” appeal. Against peers—and especially Sennheiser’s own IE600, which fixes the mids while preserving similar resolution—the IE900’s $1,300 price starts to look tough.

In short: choose the IE900 for its clean sub-bass slam, crisp transients, and airy top if that treble profile hits the spot. If the priority is natural mids and better value without giving up much technical ability, the IE600 feels like the smarter pick—and the real redemption of Sennheiser’s IEM line.

Crin original ranking

Crin Youtube Channel

Sennheiser IE900 reviewed by Head-Fi.org

Head-Fi.org 8.9 * score rescaled + normalized
10 community members have rated the Sennheiser IE900 at an average of 4.7/5 on Head-Fi. Overall sentiment: Exceptional.

URL to full Review

Head-Fi.org original ranking

Brise Audio Fugaku (more reviews)

Brise Audio Fugaku reviewed by Fox Told Me So

2025-10-11
Fox Told Me So 9.4 Reviewer Score
S+ Tuning
S Tech
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.

Fox Told Me So original ranking

Fox Told Me So Youtube Channel
Bass: S Mids: S+ Treble: S+ Dynamics: S Soundstage: S+ Details: S- Imaging: S
YouTube video thumbnail

Brise Audio Fugaku reviewed by Bad Guy Good Audio

2025-09-30
Bad Guy Good Audio 8.9 Reviewer Score
A+ Tuning
S Tech
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.

Bad Guy Good Audio original ranking

Bad Guy Good Audio Youtube Channel
Bass: A- Mids: S Treble: S

Brise Audio Fugaku reviewed by Smirk Audio

Smirk Audio 8.9 Reviewer Score
S- Tuning
S Tech
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.

Smirk Audio original ranking

Smirk Audio Head-Fi Profile

Bass: S Mids: S- Treble: A+ Dynamics: S Details: S Imaging: S-

Brise Audio Fugaku reviewed by Web Search

2025-07-16
uses AI-Search to turn user, reddit and head-fi reviews into clear, concise summaries.
Web Search 9.7 Reviewer Score
S Tuning
S+ Tech

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.

Sennheiser IE900 User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

No user reviews yet. Be the first one who writes a review!

Brise Audio Fugaku User Review Score

Average User Scores

Average User Score: n/a

Based on 0 user reviews

No user reviews yet. Be the first one who writes a review!

Sennheiser IE900 Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

5.5

Gaming Grade

B-

Brise Audio Fugaku Gaming Score

Gaming Score & Grade

  • The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

7.6

Gaming Grade

A

Sennheiser IE900 Scorings

Average Technical & Tuning Grades

Average Tunign Grade

B+
  • Expect a friendly tonal balance that could use polish but remains inviting. Great for casual listening, less so for purists.

Average Technical Grade

B+
  • An honest, middle-of-the-road performance preserves structure without chasing micro-detail. It's respectable for everyday listening sessions.
Bass S+
Expect a flagship-caliber bass presentation that defines impact, texture, and depth. Power never compromises precision.
Mids B-
Expect a competent midrange that keeps vocals grounded and instruments clear. Tone is acceptable across multiple genres.
Treble B
Highs sound lively and extended while remaining controlled. Detail retrieval keeps shimmer intact.
Dynamics B+
The performance feels robust, with satisfying punch and natural transitions. Nuances are easy to follow.
Soundstage A
The stage stretches in every direction, carving out clear three-dimensional pockets for each player. Placement accuracy impresses from the start.
Details A-
Micro-details glide to the forefront effortlessly while timbre remains natural. Ambient cues are vivid and lifelike.
Imaging B
Good imaging with precise instrument placement and clear front/back localization. Positions snap into place convincingly.
Gaming B-
Moderate spatial presentation conveys general directionality. Suitable for casual play where precision isn't critical. Bad value-to-cost for gaming purpose - not recommended

Brise Audio Fugaku Scorings

Average Technical & Tuning Grades

Average Tunign Grade

S-
  • Tonal balance reaches a highly refined state, sounding seamless from lows to highs. Everything locks together with satisfying coherence.

Average Technical Grade

S
  • Expect an effortlessly clean presentation that keeps complex mixes perfectly organized. There is zero sense of congestion even at high volume.
Bass S-
The bass digs deep with authority while staying impeccably textured. No sense of bloom muddies the mids.
Mids S-
You get reference-worthy mids that combine transparency, texture, and depth. It brings out emotional nuance beautifully.
Treble S-
Highs sound shimmering and endless, with exquisite smoothness and detail. Air and sparkle feel endless.
Dynamics S
Dynamics reach reference class, delivering lightning-fast transients and perfect contrast. Every transient feels lightning fast.
Soundstage S+
Venue reproduction feels transcendent, portraying a limitless hall with absolute positional certainty. Imaging remains rock solid at all times.
Details S
Reference-class detail delivering microscopic resolution and flawless texture reproduction. Every micro-texture is laid bare.
Imaging S-
Exceptional imaging with holographic precision that creates a palpable sense of placement. It creates a near-holographic placement.
Gaming A
Clear spatial presentation handles directional cues effectively. Distinguishes key gameplay sounds while maintaining decent immersion. Bad value-to-cost for gaming purpose - not recommended

Sennheiser IE900 User Reviews

Example User Posted on ...
0.0

"This is an example review"

Pros
  • Example pro 1
  • Example pro 2
Cons
  • Example con 1
  • Example con 2
No User-Reviews Yet

Share your experience and build your personal ranking list.

You need to be signed in to write your own review

Brise Audio Fugaku User Reviews

Example User Posted on ...
0.0

"This is an example review"

Pros
  • Example pro 1
  • Example pro 2
Cons
  • Example con 1
  • Example con 2
No User-Reviews Yet

Share your experience and build your personal ranking list.

You need to be signed in to write your own review

Find your next IEM:

IEM Finder Quiz

new
Use this quiz and answer a few questions to get your individual IEM recommendation list
(1/3) How much are you willing to spend on the IEM?
(2/3) Which sound characteristics are particularly important to you?
(3/3) Which tuning do you prefer?
You can select multiple options.
Buy

Footer