TRIPOWIN Rhombus
TRIPOWIN Rhombus pairs controlled bass with micro-detailed mids, airy treble and an impressively wide soundstage, delivering technical polish without sacrificing musical flow. PortaFi highlights its clean, composed tuning, compact comfort and well-integrated hybrid presentation—a refined, engaging IEM for detail-minded listeners who do not want a sterile sound.
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Nicely Roasted
Sound Quality
88/100
Fit Comfort Isolation
86/100
Build Accessories
86/100
Value for Money
85/100
Pros
Controlled, well-integrated bass offers satisfying depth and impact without overpowering the mix.
Detailed midrange and strong texture retrieval deliver technical clarity while retaining a musical character.
Wide soundstage is unusually strong for the price category, supported by tidy, airy treble.
Compact, smooth shells provide a comfortable fit, with solid assembly and a serviceable detachable cable.
Cons
Passive noise isolation is only average, limiting suitability for especially noisy environments.
Soundstage depth is more ordinary than its standout width.
Sub-bass is controlled rather than heavily emphasized, so bass-forward listeners may want more weight.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 88/100
The Rhombus is described as a technical but still musical listen rather than a sterile analytical one. Review evidence points to controlled low end, clear micro-contrast, clean and airy treble, and notably wide staging, with depth more ordinary than its width.
Bass
88/100
The reviewer hears good bass depth and says there is satisfying impact and weight when a track calls for it. Sub-bass is not strongly emphasized, but the low end is described as controlled and properly kept in its place.
Midrange
89/100
Midrange is described as detailed, with a small emphasis on micro-contrast. Despite that technical focus, it does not come across as overly analytical, supporting the reviewer's view that the presentation remains musical.
Treble
87/100
The treble has some lower-treble emphasis before easing off higher up. It is characterized as tidy, quick and reasonably airy, with extension slightly above average rather than aggressively bright.
Resolution Separation
88/100
The reviewer considers the handling of textures and small details strong for this price segment. This supports its intended appeal as an accessible introduction to a more technical presentation.
Soundstage Imaging
88/100
Stage width is singled out as unexpectedly good for the category. Depth is described as more average, so the spatial presentation favors lateral openness over especially deep layering.
Dynamics Coherence
87/100
The review reports no major coherence problems and specifically notes that the low frequencies remain well controlled and integrated. Reviewers say little more about large-scale dynamic swing or transient attack.
FIT COMFORT ISOLATION PERFORMANCE 86/100
Its small, rounded and smooth shells are described as sitting well in the ear without irritating edges. Fit comfort is positive, while passive noise reduction is characterized as moderate rather than class-leading.
Seal Stability
86/100
The reviewer calls the fit comfort good and says the relatively compact earpieces sit in the ears quite well. There is no reported bass loss or tonal instability caused by difficulty maintaining a seal.
Comfort
89/100
The inner shell is described as rounded, smooth and free of irritating contact points. Its small overall size also contributes to the favorable in-ear comfort assessment.
Isolation
80/100
Passive isolation is described as average. That should be sufficient for routine listening, but it is not presented as a particular strength for noisier environments.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Accessories
86/100
Build quality is positively described as very well assembled. The supplied cable is not positioned as a premium audiophile cable, but the reviewer finds it solid and perfectly serviceable; there is little detail on the included tips or long-term durability.
Value for Money
85/100
The reviewed price is stated as $63, within the supplied roughly $30–$79 range. The review presents the Rhombus as a successful route into a more mature, technical sound, but does not directly compare its value with competing IEMs.
Reviews & Sources
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Manufacturer's Description — TRIPOWIN
About Tripowin
At Tripowin, we use the latest and most advanced driver technologies in order to deliver incredible audio performance at a budget price. By focusing on uncompromising driver quality and engineering experience, we have created numerous audio solutions that have garnered international praise. Partnering closely with the audiophile community, we are always striving to create the best that sound beyond their price. It’s great audio that doesn't cost an arm.
Premium Hi-Fi Drivers
The Rhombus features the American Knowles 33518 balanced armature driver as well as a new 10mm LCP/PU composite dynamic driver. The 33518 is Knowles’ latest ultra-treble tweeter driver, capable of achieving extreme detail retrieval with ease. Tripowin’s new 10mm LCP/PU driver is constructed using a composite design of liquid crystal polymer diaphragm layer as the dome and a polyurethane layer as the suspension edge. This new design achieves a uniformity in sound like that of a single dynamic driver, but the tonal distribution and characteristics of a multi-driver setup.
The tighter diaphragm tension of the LCP layer allows incredibly fast and detailed mids and treble playback, while the PU layer slows down the larger wavelengths for more rumbles in the bass and richer mids. This double layer composite diaphragm is also matched with a double layer high-tension copper voice coil for a more responsive driver movement. Combined with a powerful N52 magnet system found in headphones, the Rhombus produces speaker-like dynamics and a rich-textured musical experience.
Acoustically Correct
The Rhombus was acoustically engineered to find the balance between musical enjoyment and monitor-accuracy. The new dynamic driver provides incredibly powerful sub-bass punches and a rich mids that is lush in texture. However, the mids have also been well-tamed as not to sound muddy or bloated. The treble is well extended thanks to the Knowles ultra-treble balanced armature driver, but is still comfortable without any piercing frequencies.
Software Engineered CNC Shell Design
The Rhombus is constructed from aerospace-grade aluminum that has been cut using a 5-axis CNC machining process. The precision of this process allows perfectly uniform acoustic cavity carving across every unit batch, reducing channel imbalances across units. Separate acoustic chambers have been designed for the dynamic and the balanced armature drivers that fit each perfectly. Each driver chamber is joined at a central chamber before the nozzle to tonally mix the sounds and remove unwanted harmonic resonance. Finally, the faceplate is constructed of a unique multi-faceted polygon design that gives Rhombus its name.
Detachable Cable
The Rhombus features a detachable 2-pin cable that terminates to a 3.5mm plug. The detachable cable allows pairing with other cables to extend the longevity of the Rhombus, as well as to meet the cable plug needs of different audio devices.
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