Note that this is a discontinued product. You may want to visit the brand's page here to browse their newer products.
What reviewers think
Bloggers and YouTubers have tried this product—so we've summarized their strongest opinions below. Links to full reviews follow.
Product Strengths
- Deepest sub-bass that is impactful, prominent, and textured, similar to a live concert experience
- Mid-range is clean and does not bleed into the bass, with vocals that stand toe-to-toe with the bass
- Smooth treble reproduction that accentuates details and provides air without harshness
- Spectacular imaging and separation of sounds
Product Considerations
- The stock cable may be similar to the Maestro Mini's cable, which is not good
- It is a little big, and some users might feel some pressure in certain areas after a few hours of listening
- Requires quite a bit of power compared to other IEMs
- Treble may lack a little air compared to some other IEMs
- Details sounded a touch on the softer side compared with other IEMs in the same price
Comparisons (according to reviewers)
- vs Maestro Mini: The SE has deeper sub-bass and more textured bass presentation, but the Mini has a touch more punch to its mid bass, and the Mini also has better treble extension
- vs Sony IER Z1R: The SE rumbles more deeply and growls in your tracks, and vocals have a bit more presence and are a little more forward in its presentation
Takeaway: The Maestro SE is a unique IEM that offers an amazing bass experience without compromising the mids and treble, making it a great choice for bass enthusiasts. With its spectacular imaging and overall enjoyable sound, it could be one of the best IEMs for those who want something different.
All
Maestro SE Custom IEM
reviews

Manufacturer details
- Drivers: Hybrid system with Dynamic Driver and Balanced Armature Drivers
- Crossover: Multi-way passive crossover
- Frequency Response: 20 Hz – 40 kHz
- Connector: 2-pin connector
- Fit Type: Custom in-ear monitor
- Linear Impedance: Corrects non-linear impedances of multi-driver systems for consistent frequency response across playback sources
- Sonar La Trompa™: Horn-inspired acoustic curvature that enhances treble tonality and provides acoustic gain control
- PhaseAlign: Proprietary structures aligning low, mid, and high frequencies to arrive coherently at the eardrum
Brand highlights
Taking a step back to look at reviewers' thoughts of the brand's entire lineup—not just this product—what stands out most is the following:
- FATfreq is recognized for its distinct "basshead" sound signature, delivering powerful and impactful bass responses, particularly in the sub-bass region, without sacrificing clarity in the mids and highs.
- They offer customizable sound profiles through interchangeable NOAH modules and tuning switches, allowing users to tailor the IEM's sound to their preferences.
- FATfreq IEMs often feature high driver counts and tribrid configurations, combining dynamic drivers, balanced armatures, and electrostatic tweeters to achieve a detailed and balanced sound.
Select products
Reference Pro SE Universals
- Positioning: A compact, studio-grade IEM reimagined with enhanced vocal clarity.
- Description: Offers an extra tweeter designed to bring out vocal transparency and detailed transient response in a balanced tonal presentation. Compared to the Musician Pro and Quantum models, it emphasizes clean studio reproduction over extended bass or planar dynamics, making it ideal for users focused on vocal performance and moderate budgets.
Musician Pro SE Universals
- Positioning: A bass-optimized IEM tuned for energetic performance and low-end impact.
- Description: Offers a uniquely tuned three-way crossover with an extra low-frequency driver that deepens bass without bleeding into mid registers. In comparison to the Reference Pro SE, it prioritizes vigorous bass output, while Quantum and flagship models deliver additional precision and modular control.
FATfreq x Effect Audio: Quantum
- Positioning: A high-performance IEM featuring innovative planar driver and modular tuning technology.
- Description: Offers a planar magnetic driver paired with detachable Noah modules and a premium Ares S II cable to ensure speed, accuracy, and fatigue-free clarity. Unlike the Reference and Musician models that focus on one tonal aspect, it provides enhanced customizability and balanced resolution.
Hayabusa Universals
- Positioning: A versatile flagship IEM designed for both live and studio applications with dual tuning options.
- Description: Offers dual-mode tuning via an analog bass toggle and incorporates additional super tweeter modules to enhance vocal detail and instrumental separation. Compared to the entry-level Reference and Musician series, it bridges the gap with creative tuning flexibility, while remaining more accessible than the ultra-premium Grand Maestro.
GRAND Maestro Universals
- Positioning: The ultimate high-end monitor featuring state-of-the-art customization and advanced acoustic technology.
- Description: Offers customizable NOAH modules, precisely engineered bass chambers, and a built-in vocal boost switch to deliver exceptional detail and tailored frequency response. In contrast to all other models in the lineup, it delivers superior build quality, expansive soundstage, and cutting-edge technology.
Our take on the brand
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Used
FATfreq
What if you spend more?
Product Strengths
- Highly adaptable sound signature through NOAH modules and vocal switches, enabling four distinct tuning profiles
- Excellent treble delivers clarity without sibilance or fatigue
- Technically excels in imaging precision and creates an immersive, three-dimensional soundstage that positions instruments with remarkable specificity
- One review stated that it is one of those sets that can do it all
Product Considerations
- Large shell size may challenge those with smaller ears
- Demands power-hungry sources, often requiring high-gain amplification to reach full potential
- Tip selection is very important to the fit, the shells are fairly big and flat, and the design makes the tips a make-or-break element of the fit
- Switch placement may be an issue, the vocal switch is positioned in such a way that the switch can be easily activated when inserting or removing the IEM
- Can sound a little sharp for some when using the blue module
Comparisons (according to reviewers)
- Vs. Custom Art Omnium: Somewhat equally performing IEMs, Grand Maestro is bassier and has a wider soundstage
- Vs. Empire Ears ETOILE: Grand Maestro Anniversary is more engaging, the GMA has more of a clear W-shaped tuning, and the GMA wins on imaging
Takeaway: The GRAND Maestro Custom IEM is a versatile IEM with customizable tuning options, allowing users to tailor the sound to their preferences and different music genres. Its excellent technical capabilities, particularly in imaging and soundstage, create an immersive listening experience.
Video review
Our take on the brand
Our summary
Product Strengths
- Offers four distinct tuning profiles through its NOAH modules and vocal switches, ranging from bass-forward to mid-centric.
- The treble, managed by electrostatic drivers, delivers clarity without sibilance or fatigue.
- Excels in imaging precision and creates an immersive, three-dimensional soundstage with remarkable instrument placement.
- The 'Grand Origin' cable included with the Anniversary Edition uses a mix of copper, silver, gold and palladium that looks and sounds incredible.
- The bass is textured, warm, and has an organic quality that is lush and very musical.
Product Considerations
- Large shell size may challenge those with smaller ears.
- Demands power-hungry sources, often requiring high-gain amplification to reach full potential.
- The position of the vocal switch makes it easy to accidentally toggle it.
- To unlock all four possible tunings, the second NOAH module must be purchased separately.
- The shells are fairly big and flat, and the design makes the tips a 'make or break' element of the fit.
Comparisons (according to reviewers)
- The GRAND Maestro Universals are bassier than the Aroma Audio Jewels, but the Jewels have a slight edge in midrange, GRAND Maestro Universals have better imaging and wider soundstage, while the Jewels are more resolving.
- GRAND Maestro Universals have more versatile tuning profile options than the Flipears Aurora XXIV.
- The Volk Audio ETOILE has a more reserved, reference-like tuning, while the GRAND Maestro Anniversary has a clear W-shaped tuning.
Takeaway: The GRAND Maestro Universals offer very customizable sound through its module system and switch, and it images well with a fantastic soundstage. This is a top-tier IEM that could be worth the money if you enjoy its unique design.
Video review
Our take on the brand
Product Strengths
- Top-notch build quality, with premium materials and a comfortable design
- Excellent sound quality with a balanced presentation—no outstanding weaknesses across the frequency spectrum
- Two sets of earpads are included (Duo and Alcantara) for sound customization
- The design has a strong aesthetic, and the magnetic pad swapping system is easy to use
- Wider soundstage and more three-dimensional imaging
Product Considerations
- Sensitivity has dropped compared to the original Empyrean and Elites, requiring slightly more power to drive
- There might be a little bit of extra emphasis around the three to four kilohertz mark, which can make them a little bit fatiguing—a little bit bitey in the treble
- Not the largest soundstage that can be experienced at this price point
- The open design leaks sound and doesn't offer much in the way of isolation
- Those particularly sensitive might hear some spikiness in the lower treble region
Comparisons (according to reviewers)
- Vs Original Meze Empyrean: Empyrean II has a more neutral tuning, is more defined, and has better detail separation
- Vs Meze Elite: Empyrean II offers stronger bass extension and more of the engaging emotional delivery
- Vs Meze Elite: The Elite seems more expansive than Empyrean 2, though not by a lot
- Vs HIFIMAN HE1000SE: The HE1000SE sound is more spacious, the bass is snappier, and the amount of detail is slightly above the Elite and Empyrean
Takeaway: The Empyrean II is an enjoyable headphone, improving on the original with a more accurate and versatile sound that maintains the core Empyrean identity. The comfort, build quality, and well-balanced sound make it a great choice for a high-end listening experience.
Video review
Our take on the brand
Product Strengths
- Detailed and energetic listening experience, engaging and resolving with a low-end weight and warmth that is fun and non-fatiguing
- Dynamics are impactful, transients are notably quick, and it has Beryllium drivers with an almost electrostatic speediness
- Exceptional build quality with high-quality leather and beautifully shaped metal parts, giving the headphones a strong aura of undeniable luxury
- Easy to drive, delivering a full sound regardless of the source, and can be driven by almost anything with a headphone jack
- Likely the most spacious closed-back pair of headphones encountered by one reviewer, and presents a three-dimensional soundstage
Product Considerations
- Somewhat intimate soundstage compared to open-back headphones
- The included rubber-coated cables are slightly stiff and somewhat microphonic
- Bass can be a bit boomy with stock pads
Comparisons (according to reviewers)
- Vs Sennheiser HD800: Stellia offers a similar soundstage, but the Sennheisers require more power and sound thinner
- Vs Sennheiser HD650: Stellia sounds like a more detailed and bassy HD650
- Vs Focal Clear MG: Clear MG is more balanced, more open sounding, and has a better soundstage
Takeaway: The Focal Stellia is an extremely well-built and luxurious headphone that provides a detailed and enjoyable listening experience with a punchy and clean sound. For those seeking a closed-back headphone that can reveal every detail in music, it is worth considering.
Video review
Our take on the brand
What competes at this price?
Our Summary
Product Strengths
- Delivers an intense, brash, and enjoyable 'subwoofer madness' bass experience without overly compromising the midrange and treble
- Maintains balanced sound, ensuring vocals (especially female vocals) remain present and clear even with strong bass presence
- Offers solid imaging, instrument and vocal separation, and enough soundstage to avoid sounding claustrophobic
- Reproduces treble in a subtle, gentle, and smooth manner thanks to the EST drivers used, avoiding harshness and accentuating details with sufficient air
- Fits ears very well and isolates noise effectively due to its deep insertion and larger body
Product Considerations
- Can sound muddy on busy tracks
- The size might be uncomfortable for some users after a few hours of listening
- Requires quite a bit of power compared to other IEMs
- Detail sounded a touch on the softer side compared with other IEMs in the same price
- The stock cable is not good
Comparisons (according to reviewers)
- Vs Maestro Mini: Offers upgraded resolution and smoothness throughout compared to the Mini, especially in bass texture and resolution
- Vs IER-Z1R: Has more rumble, unlike the IER-Z1R, capturing spine-chilling bass experiences
- Vs U12T: The soundstage is better and bigger than U12T
- Vs U12T: Imaging, separation and general clarity are a bit better than U12T
Takeaway: The Maestro SE Universals are a top choice for bass enthusiasts who want excellent bass without sacrificing clarity in the mids and highs. With great imaging and a comfortable fit, they provide an immersive and enjoyable listening experience.
Video review
Our take on the brand
Our Summary
Video review
Our take on the brand
Our Summary
Video review
Our take on the brand
Our Summary
Product Strengths
- Incredible sound quality, with neutrality, detail, and balance across the frequency range
- Excellent build quality with premium materials and comfortable, luxurious design, making them suitable for extended listening sessions
- Adequate battery life, with reviewers reporting around 35 hours of wireless playback with ANC
- Effective active noise cancellation reduces low-frequency sounds without significantly impacting sound quality
- Versatile connectivity options including Bluetooth, USB-C for high-resolution audio, and a 3.5mm analog input that can be used passively
Product Considerations
- High price point puts them out of reach for many consumers
- Lack of a companion app limits customization options like EQ settings, firmware updates via mobile, and custom control settings
- Large earcups and overall weight may not be suitable for those with smaller heads, and the headband may slip
- Included travel case is large
- Some reviewers found the dark chocolate color scheme unappealing
Comparisons (according to reviewers)
- The DALI IO-12 has better ANC than the Focal Bathys
- The IO-12 is similar in sound signature to the Mark Levinson No. 5909
Takeaway: The DALI IO-12 is a high-end wireless headphone that delivers exceptional sound quality, comfort, and versatility, making it a great choice for audiophiles who want a premium listening experience on the go. Its blend of wired and wireless capabilities, combined with a mature design, makes it an excellent all-around performer.
Video review
Our take on the brand
Our Summary
Product Strengths
- Impressive sound quality bridges the gap between wired and wireless performance
- It is a versatile product that can be used as a passive headphone, a USB DAC, or a Bluetooth headphone
- High build quality, with premium materials like milled aluminum contributing to a robust and luxurious feel
- Comfortable to wear for extended periods
- Long battery life, especially in standard mode—up to 70 hours
Product Considerations
- The fit may not be ideal for those with wider heads
- The treble response could be sweeter
- The active noise cancellation may not be class-leading compared to some competitors
- The volume in wireless mode may not be loud enough for some listeners
- Soundstage presentation feels intimate compared to full-sized reference headphones
Comparisons (according to reviewers)
- Vs Mark Levinson No.5909: The Solitaire T has more detail and better organization, though the No. 5909 has a bigger, more spacious presentation
- Vs Bowers & Wilkins PX8: The noise cancelling of the PX8 is better
- Vs Focal Celestee: The Solitaire T is comparable when used as a passive wired headphone
Takeaway: The T+A Solitaire T is a versatile and well-built headphone that offers high-quality sound in both wired and wireless modes, making it a great choice for audiophiles on the go or those who want one set of headphones for all situations. Listeners can enjoy music in a lot of different ways with these, and they sound very good.
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