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
- Slim and gorgeous look with French flair
- Cabinetry is made of multiple layers of high-density fiberboard with piano lacquer finish
- Tweeter horn uses injected aluminum
Product Considerations
- The speaker is quite tall, so keep that in mind when purchasing a speaker stand
- Sound can be fatiguing at higher volumes
- Grilles fit by way of pointed studs into holes next to the woofer cones
Comparisons (according to reviewers)
- Compared to the KEF R3, the Theta Signature has a similar soundstage
- Compared to the LS50, the Theta Signature's soundstage is about 5-8% less
- Compared to the KEF R3, the bass doesn't go as deep
- Compared to the LS50, the bass doesn't go as deep, with about a 20% difference
Takeaway: The Signature Theta is a visually stunning and elegantly finished speaker that sounds lifelike and musical. It is great for those who want French-made speakers with a premium build.
All
Signature - Theta
reviews

Manufacturer details
- Type: Bookshelf speakers with front bass reflex port
- Sensitivity: 90dB/W/m
- Frequency Response: 45Hz-22000Hz (+/-3dB)
- Nominal impedance: 8Ω
- Minimum impedance: 3.4Ω
- Power Handling: 90W
- Recommended Amplifier Power: 25-130 Watts (8ohms)
- Drivers: 1 x 25mm titanium dome Tweeter horn, 1 x 16.5cm small pleat suspension Midwoofer
- Crossover: 2 Ways, 2700Hz
- Dimensions (W x H x D): 233 x 465 x 372 mm
- Net Weight: 11.5 kg
- Gross Weight: 15.6 kg
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:
- Triangle leverages its Esprit Ez series paper cone technology in its more affordable Borea line, allowing for stunning realism and tonality in the midrange at an accessible price point.
- Triangle speakers leverage their Efficient Flow System (EFS) tweeter design, pairing a silk dome with a phase plug to provide a wide sound dispersion and airy, delicate high frequencies.
- Triangle's Borea line incorporates their Driver Vibration Absorption System (DVAS), which braces the drive units and uses high-density foam to minimize cabinet vibrations and enhance clarity, contributing to the overall sound quality.
Select products
Borea BR09
- Positioning: The entry-level line, designed for affordability and compactness.
- Description: Offers a robust sound experience with its three-way design, making it ideal for larger rooms over 30m². Features three 16cm bass drivers in a bass-reflex enclosure, providing deep bass similar to more expensive models like the Esprit EZ Antal. This makes it a great choice for those seeking high power handling and a wide soundstage on a budget.
Esprit EZ Antal
- Positioning: Mid-range floorstanding speaker, balancing performance and price.
- Description: Features a horn-loaded tweeter and natural cellulose midrange, delivering dynamic sound and efficiency. It offers a more refined sound compared to the Borea BR09, with improved midrange clarity and bass depth, suitable for rooms between 15 and 50m².
Esprit EZ Australe
- Positioning: High-end floorstanding speaker within the Esprit range.
- Description: Stands out with its Dynamic Pulse System, featuring a rear tweeter for enhanced soundstage, a feature borrowed from the flagship Magellan series. It offers superior bass performance with three new-generation bass drivers.
Esprit 40th Antal
- Positioning: Anniversary edition, celebrating 40 years of Triangle's innovation.
- Description: Features a magnesium dome tweeter and composite membrane woofers, providing a rich and clear sound. It offers a more sophisticated design and sound quality than the standard Antal, suitable for rooms from 15 to 50m².
Signature Theta
- Positioning: Premium bookshelf speaker, designed for compact spaces.
- Description: Combines high-density cabinets with a horn-loaded tweeter for impressive clarity and depth. It offers a more compact solution compared to the floorstanding Signature Alpha, suitable for medium rooms between 15 and 30m².
Signature Alpha
- Positioning: Flagship floorstanding speaker, representing the pinnacle of Triangle's technology.
- Description: Features a semi pod-mounted horn tweeter and three custom-designed woofers, delivering deep and fast bass. It offers exceptional acoustic performance with high-density cabinets, suitable for large rooms over 30m².
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Used
Triangle
What if you spend more?
Liveliness and dynamics are trademarks of TRIANGLE's sound, and they are packed into this gem, the Duetto, a compact 2-way bookshelf speaker.
Superb piece of engineering, its horn-loaded tweeter TZ2900 is equipped with a next generation dome in magnesium alloy. This transducer highlights the finest details of your recordings and brings out the subtlety of the upper harmonics.
Its full-range 16 cm midrange/bass driver produces rich bass details. It features a new paper cone that reproduces any vocal register with great neutrality without the slightest coloration. The Duetto speaker offers a really clear sound and puts the music forward.
Its elaborate crossover, equipped with high quality components, optimizes the bass and treble phasing for an outstanding transparency.
This compact speaker fits perfectly in rooms of less than 30m2, a technological achievement for a speaker consisting of only two drivers, The Duetto is supplied with an accessory box for an adapted decoupling. The S08 speaker stand, designed specifically for this model, is available as an option.
Product Strengths
- The Magellan line represents Triangle's 'all out, cost no object designs'—making these speakers among the best the brand makes
- The tweeter provides an accurate, smooth, and fluid musical quality, highlighting fine details and upper harmonics
- The midrange/bass driver delivers firm and dynamic bass frequencies while maintaining clarity and finesse in the vocal register
- They offer fantastic clarity and an open sound, making listening to music an exciting experience—allowing listeners to soak it all in
- The speaker creates a wide sweet spot great for listening with more than one person
Product Considerations
- The speakers can sound overly bright, hard-edged, and forward if not properly run-in, requiring a break-in period before critical listening
- They need careful partnering with electronics to avoid an overly bright sound, as they aren't particularly forgiving of aggressive recordings or brighter-sounding equipment
- The bass may sound weak in a large room, so Triangle suggests a small to medium room for these speakers
- The packaging may not be sufficient, as the speakers are heavy and shipped in one box, potentially damaging the packing materials
- Siting can be critical, with placement affecting the bass quality—positioning them too close to the rear wall can negatively impact the bass
Comparisons (according to reviewers)
- Vs Børresen X1: The Triangle Magellan Duetto has a more open and airy sound, whereas the X1 has a more bass-centric sound
- Vs Daniel Hertz Ambers and Focal Diablo: The Triangle Magellan Duetto offers more musical information
Takeaway: The Triangle Magellan Duetto is a high-end bookshelf speaker known for its clarity, detail, and engaging sound. Beautifully crafted, they are a great way to enjoy music if a detailed and lively sound is desired.
Video review
Our take on the brand
Its full-range 16 cm midrange/bass driver produces rich bass details. It features a new paper cone that reproduces any vocal register with great neutrality without the slightest coloration. The Duetto speaker offers a really clear sound and puts the music forward. Its elaborate crossover, equipped with high quality components, optimizes the bass and treble phasing for an outstanding transparency. This compact speaker fits perfectly in rooms of less than 30m2, a technological achievement for a speaker consisting of only two drivers, The Duetto is supplied with an accessory box for an adapted decoupling. The S08 speaker stand, designed specifically for this model, is available as an option.
With a cellulose pulp diaphragm and its "progressive" suspension, the midrange/bass driver has that rich, natural sound the brand is known for. Thanks to its suspension, there is no clear separation at the cone attachment, resulting in a seamless mid-range. The diaphragm houses an ultra-light anti-vortex polypropylene cone covered with a latex damping material to limit end of band irregularities. Featuring a powerful motor and a perfectly matched voice coil, this driver is capable of reproducing firm and dynamic low frequencies while maintaining remarkable clarity and finesse in the vocal register.
Product Strengths
- Drop dead gorgeous speakers with pride taken in making them by hand in France
- Treble is pure silk and also quite airy with sublime tweeters
- Very balanced from top to bottom, and a touch forward in the sound projection
- Midrange is silky, sweet, clear as a bell, and has life to it that wakes up the brain
- Delivers constantly pleasing results with all musical styles and genres
Product Considerations
- Can sound over-bright, hard-edged, and forward until they've had the best part of a week to run-in
- Aren't particularly forgiving of aggressive recordings or brighter-sounding electronics
- Bass response may not satisfy those seeking very deep bass in larger rooms
- Packaging might be insufficient for a long term solution
- The finish around the two front-facing ports could be neater, judged by the highest standards
Comparisons (according to reviewers)
- Compared to the Børresen X1, Triangle has more energy in the top end and more pop and realism in that treble area
- Compared to the Børresen X2, the 40th Duettos will not pump the bass like the Børresen X2's
- Compared to the Bowers & Wilkins 805Di, Triangle Magellan Duetto outclassed the Brit with transient speed
- Compared to the Daniel Hertz Ambers, the reviewer preferred the style of the Triangle
Takeaway: The Triangle Magellan Duetto is a fantastic speaker with clarity, detail, and wide-open sound without brightness or hardness, offering energy and realism. It could be worth buying for music lovers looking for a thrilling listening experience.
Video review
Our take on the brand
Product Strengths
- Excellent build quality, featuring a blend of aluminum, leather, and wood veneer, or gloss paint.
- Detailed sound with excellent stereo imagery.
- Good detail and clarity.
- Wide and deep soundstage.
- Design features contribute to cabinet rigidity and reduced coloration.
Product Considerations
- May sound bright with the wrong amplifier or cables.
- May require a high-power solid-state amp.
- Needs quality amplification and may sound soft if underpowered.
- Requires stands, adding to the overall cost.
- Bass may not satisfy those seeking high-output bass without a subwoofer.
Takeaway: The 805 D4 is an excellent speaker that is beautifully built and delivers a detailed and engaging sound. It's a great option for those seeking a premium listening experience.
Video review
Our take on the brand
Delivers performance beyond what is typically associated with its price.
Our summary
Product Strengths
- Full-range sound, impressive bass response, and the ability to pressurize a room, often negating the need for a separate subwoofer
- Smooth, warm, and coherent midrange provides natural and engaging vocals and instruments for long listening sessions without fatigue
- Well-extended treble presents in a naturally smooth, enjoyable, and pleasing manner
- Excellent imaging and soundstage capabilities create a realistic and immersive listening experience
- Sound reproduction makes it a speaker that one can live with
- Connectivity options are available
Product Considerations
- Quality amplification with sufficient power and current is required to achieve optimal performance and control the woofer effectively
- The backplate for bass adjustment uses wood screws, making it easy to strip if not handled carefully
- Placement and setup, especially stand height and toe-in, are crucial for achieving the best high-frequency response, it can sound dull if not optimized
- May not be ideal for listeners who prefer a brighter, more forward sound signature or those who prioritize extreme loudness levels
- Grilles may cause micro-rattling at moderate to loud listening levels due to weaker magnets
Comparisons (according to reviewers)
- Vs Totem Acoustic Manny 2 Signature: The Studio 2 has a more forgiving presentation, denser midrange, and stronger bass
- Vs Klipsch Forte 3: The Studio 2 offers a more natural tone, especially in the midrange and upper bass, along with greater soundstage depth
- Vs Vienna Acoustics Mozart Symphony Editions: The Studio 2 beats them in bass and midrange
- Vs Harbeth (SHL5 and Compact 7 XTs): The Studio 2 cannot be matched by the Harbeth's articulate bass response
- Vs Celestion SL6-S: The Studio 2 has deeper roots in the trunk, and they got high branches and leaves, but they don't go all the way up to the highest branches and leaves at the tippy top
Takeaway:
The Studio 2 is a well-built bookshelf speaker that delivers a smooth, full-range sound with surprising bass and clear imaging, making for an engaging listening experience. With the right setup and quality components, these speakers can provide years of musical enjoyment in a variety of room sizes.
Video review
Our take on the brand
What competes at this price?
Our Summary
Product Strengths
- Excellent wireless stability, pairing easily and remaining connected even with other wireless activity
- Big, confident, and enjoyable sound, with surprising bass extension for its size
- Aesthetically pleasing design, with unique and attractive finish options
- Versatile connectivity options through its media hub, including multiple digital and analog inputs, plus Bluetooth, AirPlay, and Chromecast
Product Considerations
- The absence of a dedicated streaming app may require reliance on third-party apps or external streamers
- The system could benefit from a slightly more refined sonic presentation, needing a touch more sweetness and natural warmth
- There can be some audible amplifier noise at idle/start-up, depending on proximity
- The base of the speakers can be quite large, potentially requiring dedicated stands for proper placement
- No wired subwoofer output
Comparisons (according to reviewers)
- Compared to KEF LS50 Wireless II, the Capella will appeal to those who would rather have a more classic, wood-cabineted speaker on show than the ultra-modern aesthetic of the Brit boxes
- Compared to Triangle Borea BR03 BT, the Triangle Capella active speaker system is much more ambitious, with more advanced drivers and superior fit and finish
- Compared to Buchardt A10, the Triangle Capella and Buchardt A10 are more similar than different, but still pretty different, as they use the same concept
Takeaway: The Triangle Capella is a convenient and stylish all-in-one system that delivers a big and enjoyable sound. It's a great choice for those seeking hifi audio without the complexities of traditional separates.
Video review
Our take on the brand
Our Summary
Product Strengths
- Gorgeous sound is clear, smooth, detailed, and dynamic
- Elegant design is dashingly elegant, minimalist aesthetic, and painstakingly crafted for equal parts style and substance
- Impressive bass extension and output, described as deep and firm, surprising for their size
- Clear midrange makes voices sound purposeful, characterful, and entirely present
- Versatile connectivity with streaming and input options, including Chromecast, AirPlay 2, phono pre-amp, and HDMI ARC/eARC
Product Considerations
- Some reviewers experienced streaming and HDMI ARC reliability issues
- Input and control layout can be inconvenient and awkward
- Prototype unit had operational bugs
- No bass level adjustment is available, though it could be added in mobile app
Comparisons (according to reviewers)
- Vs KEF LS50 Wireless II—the KEF LS50 Wireless II is a similarly high-end option
- Vs PSB Alpha iQ—the PSB Alpha iQ is a more compact wireless speaker package than the Sonus Faber and is comparatively lighter on bass
Takeaway: The Sonus Faber Duetto speakers are well-suited for those seeking amazing sound and a beautiful design in one package. These speakers are easy to connect and use, and fill the room with rich, detailed audio.
Video review
Our take on the brand
Our Summary
Product Strengths
- Exceptional bass performance for its compact size, with bass that is fast, clear, and tight
- Multiple 'Master Tunings' offer customizable sound profiles, adapting to different room acoustics and user preferences
- A high-quality Purifi woofer and SB Acoustics tweeter contribute to clarity, detail, and low distortion
- A solid wood cabinet made in Denmark provides a luxurious look and feel
Product Considerations
- Bass output may diminish or be limited at high volumes to protect the drivers from damage
- A separate purchase of the Platin Stereo Hub may be required for full wireless functionality and room correction
- The 'Made in China' label applies to the electronics inside the cabinet
- While the A10 offers impressive bass, some may still prefer to add a subwoofer for a true full-range experience
Comparisons (according to reviewers)
- Vs Buchardt S400 Mark II, the A10 is more transparent with greater inner detail, clarity, and top-end extension—and deeper, tighter bass—while the S400 Mark II is more relaxed and forgiving with harsh recordings
- Vs Buchardt A500, the A10 has comparable performance, with possibly a crisper sound in some instances
Takeaway: The Buchardt Anniversary 10 is a compact yet powerful speaker that offers a customizable listening experience. Its impressive bass and versatile tuning options make it a great choice for those seeking a high-quality audio solution in a small to medium-sized room.
Video review
Our take on the brand
Our Summary
Product Strengths
- Remarkable sound power and early directivity indexes make it a true point source speaker.
- Special sound quality for the price offers a level of performance not typically found in speakers at this price point.
- Very good neutrality is present when the speaker is turned off axis.
- It is a very versatile speaker to drive.
- The midrange presentation is very dead center and coherent.
Product Considerations
- The bass does not reach as low as some listeners might prefer.
- The speaker can get bright at times.
- Care should be taken to place it not directly on axis, because when placed directly on axis, it is no longer a neutral speaker.
- There's no stand included in the package.
- It is made in China, and construction can be suspect.
Comparisons (according to reviewers)
- Vs PureAudioProject Duet 15, the SourcePoint 10 is more precise and focused, while the PureAudioProject has a bigger soundstage.
- Vs Fleetwood Deville SQ, they sounded more alike than different when in action, but SourcePoint was more extended from top to bottom and brought more lively dynamics and impact.
- Vs Klipsch Heresy IV, the SourcePoint 10 is the superior speaker in every way from build to sound, with more refinement and smoothness, and it seems just as dynamic as the Klipsch.
- Vs Dynaudio Special 40s, the SourcePoint 10 sounds much bigger, more dynamic, has much better bass, and fills a room with ease.
- Vs KEF LS50 META, the LS50 sounds smaller, leaner, and not as special in the vocal region.
Takeaway:
The SourcePoint is a speaker with a neutral sound that originates from a single point, and it has remarkable early directivity indexes. It is a speaker that offers very good performance for the money, but careful attention needs to be paid to its placement in the room.
Video review
Our take on the brand
Our Summary
Product Strengths
- Solidly built with an inert cabinet, contributing to overall performance
- Crazy linear/neutral sound from about 100Hz upwards
- The beryllium tweeter provides nuanced, airy, and extended highs with a hint of shimmer for realistic metallic instruments
- It creates a three-dimensional soundstage, making the speakers disappear sonically
Product Considerations
- It does not have a great deal of bass on its own and may require a subwoofer for full-range playback, starting its roll-off at around 100Hz
- While placement is flexible, a solid amplifier is required
- The styling might be an acquired taste and could be considered overcomplicated by some
- The high gloss finishes may not appear different from less expensive speakers, making it harder to justify the luxury price tag
Comparisons (according to reviewers)
- Vs Bowers & Wilkins 805 D4: The S4B is more neutral/accurate, while the 805 D4 adds bass and treble energy
- Vs Focal Canta No. 1: The S4B outperforms the Canta No. 1, which has chestiness in its bass and midrange due to its cabinet
- Vs Revel Studio 2: The S4B reminded the reviewer of the Revel Studio 2, though the Revels had more bass
- Vs Focal Diablo Utopia: The Perlisten are a great alternative if the Utopias are outside of your reach and are a more neutral and less bright speaker
- Vs EgglestonWorks Nico Evo: The EgglestonWorks presentation is a little more mid-forward and less 3D than the Perlisten
Takeaway: The Perlisten S4b is a high-performing speaker that offers excellent clarity and a neutral sound, making it a great choice for audiophiles and home cinema enthusiasts alike. The speaker's ability to create a detailed and immersive soundstage can bring music and movies to life.
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