Audio T Verdict
The Triangle Magellan Duetto 40th is the smallest stereo loudspeaker in the Magellan 40th Anniversary range, but describing it as simply a scaled-down version of the larger Cello does it a disservice.
Duetto is designed specifically as a large two-way standmount, using one 25mm magnesium-dome horn tweeter and one 165mm natural-paper mid/bass driver in each curved cabinet. The mid/bass unit therefore has the difficult job of covering everything from deep bass up to the 3.1kHz crossover, rather than handing the lower midrange to a separate driver as the Cello does.
Triangle has put a considerable amount of engineering into making that work. The 165mm driver uses a cellulose-pulp diaphragm, progressive suspension and a lightweight polypropylene anti-vortex element with latex damping, allowing it to combine useful low-frequency extension with the speed and neutrality required through the vocal range.
The tweeter is the same fundamental Magellan 40th TZ2900PM-MG concept found higher in the range, with a magnesium-alloy dome, horn loading, phase plug and rear counter-cap. It is a substantially more sophisticated high-frequency assembly than simply fitting a metal dome into a conventional flat baffle.
Triangle currently specifies a 40Hz to 30kHz ±3dB bandwidth, 88dB sensitivity, 8-ohm nominal impedance and a 3.4-ohm minimum. Recommended amplifier power stretches from 30 to 200 watts into 8 ohms, so the Duetto can work with a broad range of quality amplification while still benefiting from an amplifier with good current delivery.
At 460mm high, 350mm deep and 16.8kg each, these are not small bookshelf speakers despite Triangle's terminology. Proper stands are essential if you want them positioned at the correct height and allowed to perform as intended.
Triangle's dedicated S08 stand is particularly interesting because the speaker can be locked securely to it, the stand can be mass loaded, cable routing is built into the rear and its centre spike uses Triangle's SPEC mechanical-energy system.
For someone who wants the engineering quality and scale of the Magellan range but either cannot accommodate a large floorstander or actively prefers the imaging and room flexibility of a serious standmount, the Duetto 40th is arguably one of the most interesting speakers Triangle makes.
Triangle Magellan Duetto 40th Anniversary
The Magellan Duetto 40th is a premium two-way passive standmount loudspeaker designed and manufactured in France.
Key features include:
- Two-way standmount design
- Two drive units per speaker
- Front-facing bass-reflex port
- 25mm TZ2900PM-MG magnesium-dome horn tweeter
- 165mm natural-paper mid/bass driver
- Progressive mid/bass suspension
- Anti-vortex polypropylene cone element
- Latex damping treatment
- 40Hz–30kHz ±3dB frequency response
- 88dB/W/m sensitivity
- 8-ohm nominal impedance
- 3.4-ohm minimum impedance
- 80W power handling
- 30–200W recommended amplifier power
- 3.1kHz crossover frequency
- High-grade SCR Audio crossover components
- AudioQuest internal wiring
- Curved multi-layer HDF cabinet
- Dedicated Triangle S08 stand available
- Magnetic protective grilles
- Certificate of authenticity
- Made in France
The Standmount Magellan
Duetto is the standmount model within Triangle's Magellan 40th stereo range.
The principal stereo models progress through:
- Duetto 40th - two-way standmount
- Cello 40th - three-way floorstander
- Quatuor 40th - larger three-way floorstander
The Duetto is not simply a Cello with the bass drivers removed. Its dedicated mid/bass unit has been developed specifically to reproduce a much wider frequency range.
Two-Way Design
Each speaker uses:
- 1 x 25mm tweeter
- 1 x 165mm mid/bass driver
The signal is divided between them at approximately 3.1kHz.
TZ2900PM-MG Magnesium Horn Tweeter
High frequencies are handled by Triangle's TZ2900PM-MG tweeter.
The Anniversary generation replaces the previous Magellan dome material with magnesium alloy.
Magnesium combines:
- Low moving mass
- High rigidity
- Useful mechanical consistency
Horn Loading
The magnesium dome sits inside Triangle's horn assembly rather than radiating directly from a conventional flat faceplate.
The horn profile is designed to manage high-frequency directivity and acoustic loading.
Phase Plug
A phase plug is integrated into the high-frequency system.
Together with the horn geometry, Triangle uses it to help linearise the tweeter's response away from the central listening axis.
Rear Tweeter Counter-Cap
The tweeter motor also incorporates a rear counter-cap.
Triangle uses this to control the rear wave generated by the tweeter and reduce unwanted reflection behind the diaphragm.
165mm Natural-Paper Mid/Bass Driver
One 165mm driver handles both the midrange and low frequencies.
Its diaphragm is based on cellulose pulp rather than the SVA fibreglass sandwich construction used by the dedicated woofers in the Cello and Quatuor.
Why Paper?
Triangle has a long history of using paper-based diaphragms through the midrange.
In the Duetto, the cone needs to remain sufficiently light and controlled to reproduce voices naturally while also moving enough air to produce meaningful bass.
Progressive Suspension
The Duetto mid/bass uses what Triangle describes as a progressive suspension.
It is designed to integrate smoothly with the cone and support both midrange accuracy and the greater excursion required at low frequencies.
Anti-Vortex Cone
At the centre of the diaphragm sits an ultra-light polypropylene anti-vortex element.
Triangle applies latex damping material to help control irregularities towards the upper end of the driver's operating range.
40Hz to 30kHz Frequency Response
Triangle specifies:
40Hz – 30kHz ±3dB.
40Hz From a Standmount
A qualified 40Hz lower limit is substantial for a standmount using a single 165mm bass/mid driver.
It means a subwoofer is not automatically necessary for normal two-channel music listening.
Do You Need a Subwoofer?
For most music systems, possibly not.
A subwoofer becomes more relevant if you want:
- Strong output below 40Hz
- Home-cinema LFE reproduction
- Deep electronic bass
- Pipe-organ fundamentals
- Independent control of low-frequency room modes
Front-Facing Bass Reflex Port
The Duetto uses a front-facing bass-reflex system.
This gives useful flexibility when positioning the speaker relative to the wall behind it.
Front Port Does Not Mean the Rear Wall Stops Mattering
All of the Duetto's low-frequency output interacts with the room.
Moving the speakers towards a rear wall or corner can still increase bass reinforcement and change tonal balance.
Triangle Wide-Venting Technology
The wider Magellan 40th platform uses Triangle's Wide-Venting approach to bass-reflex loading.
Internal and external flares are designed to control airflow and reduce turbulence that can otherwise become audible at high output.
Recommended for Rooms From 15 to 40m²
Triangle recommends the Duetto 40th for listening rooms between approximately:
15 and 40 square metres.
Room Size Is a Guide
A room's dimensions alone do not determine whether a speaker will work well.
Listening distance, room construction, furnishings, amplifier capability and required playback level all matter too.
88dB Sensitivity
Triangle specifies sensitivity at:
88dB/W/m.
This is lower than the Antal 40th and Cello 40th, so the Duetto does not produce quite as much output from the same small amount of amplifier power.
8-Ohm Nominal Impedance
The headline nominal impedance is:
8 ohms.
Triangle specifies a minimum impedance of approximately 3.4 ohms.
Minimum Impedance Matters
The amplifier does not see a constant 8-ohm load at every frequency.
Because impedance falls significantly lower, use a properly designed amplifier with good current capability rather than choosing purely by headline wattage.
Recommended Amplification: 30–200W
Triangle recommends:
30 to 200 watts per channel into 8 ohms.
You Do Not Need a 200W Amplifier
The upper limit is not a target.
A high-quality amplifier at the lower or middle part of Triangle's recommendation can make an excellent partner in an appropriately sized room.
80W Power Handling
Triangle specifies:
80W power handling.
This does not mean the Duetto requires an 80W amplifier. Triangle recommends amplifiers from 30 to 200W per channel into 8 ohms, with clean operation and sensible volume remaining more important than comparing wattage figures in isolation.
3.1kHz Crossover
Triangle specifies the crossover frequency at:
3100Hz.
The mid/bass therefore covers a very broad part of the audible spectrum before handing over to the horn tweeter.
Magellan 40th Crossover Components
The Magellan 40th crossover programme uses high-grade components selected by Triangle, including:
- French MKP capacitors developed with SCR Audio
- Low-inductance ceramic resistors
- Large-section air-core coils
Steep Crossover Slopes
Triangle's Magellan crossover design uses slopes reaching up to 24dB per octave, matched to the natural behaviour of the drive units.
The company also works to linearise driver impedance around the crossover region to make the electrical load more controlled for the amplifier.
AudioQuest Internal Wiring
Internal wiring across the Magellan 40th range was developed with AudioQuest.
Triangle specifies a combination of:
- Long-Grain Copper - LGC
- Perfect-Surface Copper - PSC
Curved Multi-Layer Cabinet
The Duetto inherits the curved Magellan cabinet construction.
The enclosure sides are formed from successive layers of approximately 3mm high-density fibreboard.
The layers are moulded under tension to achieve the curved profile.
Why a Curved Cabinet?
Triangle uses the shape to reduce large parallel internal surfaces that can encourage standing waves.
The enclosure is also reinforced according to measurements of cabinet vibration and deformation.
250mm Wide, 460mm High
Each Duetto measures approximately:
- Width: 250mm
- Height: 460mm
- Depth: 350mm
It is therefore much larger than many conventional compact bookshelf speakers.
16.8kg Per Speaker
Triangle specifies:
16.8kg net per speaker.
That substantial weight is another reason to use a proper speaker stand rather than an unsuitable shelf or lightweight piece of furniture.
Use Proper Speaker Stands
Correct stand height helps place the horn tweeter appropriately relative to seated ear level.
A good stand also provides:
- Stable support
- Freedom to adjust wall distance
- Freedom to experiment with toe-in
- Matching left and right height
- Improved mechanical stability
Dedicated Triangle S08 Stand
The S08 was developed specifically for the Magellan Duetto 40th.
Triangle incorporates a locking system so the loudspeaker can be mechanically secured to the stand.
680mm S08 Stand Height
The dedicated S08 is approximately 680mm high before its spikes are fitted.
Combined with the Duetto's 460mm cabinet, this places the loudspeaker at a sensible height for seated listening.
Mass-Loadable S08
The stand columns are sealed so granular ballast or small steel ballast balls can be added.
Adding mass can increase stability and change the mechanical behaviour of the support.
SPEC Centre Spike
The S08 stands use three adjustable metal spikes.
The central spike incorporates Triangle's SPEC - Single Point Energy Conductor - concept, designed to provide a controlled route for mechanical energy towards the floor.
Cable Management
A rear cable-routing system is built into the S08, helping speaker cable run more discreetly down the stand.
S08 Footprint
The dedicated stand base measures approximately:
- Width: 450mm
- Depth: 420mm
Allow for this footprint when planning the final speaker position.
S08 Stands Are Sold Separately
The Magellan Duetto 40th speakers do not include the dedicated S08 stands as standard.
Alternative high-quality speaker stands may also be suitable, provided they offer the correct height, stability and top-plate support.
Counter-Spikes Supplied
Triangle supplies eight counter-spikes with the pair.
These provide a protective interface when using pointed supports on suitable hard-floor installations.
Protect Delicate Flooring
Do not place exposed metal points directly onto wood, laminate, tile or another delicate surface without suitable protection.
Use the supplied counter-spikes or another appropriate protective interface on hard floors.
Magnetic Grilles
Two magnetic protective grilles are supplied with the pair.
The magnetic fixing leaves the front baffle free of conventional grille pegs when the speakers are used uncovered.
Certificate of Authenticity
Triangle supplies a certificate of authenticity with the Duetto 40th.
The rear Magellan connection assembly also carries an individual serial number as part of the range's premium construction.
Handling Gloves and Maintenance Cloth
Triangle supplies:
- Certificate of authenticity
- Microfibre maintenance cloth
- Handling gloves
- Magnetic grilles
- Counter-spikes
among the supplied accessories.
Available Finishes
The Duetto 40th is available in:
- Shadow Zebrano
- Golden Oak
- Space Black
- Space White
Shadow Zebrano
Shadow Zebrano is the dark striped timber finish used across the Magellan 40th range.
Golden Oak
Golden Oak provides the lighter natural-timber option within the range.
Space Black and Space White
The gloss solid-colour finishes provide more contemporary alternatives to the natural wood options.
Made in France
The Magellan 40th range is designed and manufactured in France as part of Triangle's premium loudspeaker programme.
Duetto 40th Versus Comète 40th
Comète 40th
- Esprit 40th Anniversary range
- Two-way standmount
- 25mm magnesium horn tweeter
- 165mm cellulose mid/bass
- 47Hz–22kHz ±3dB
- 90dB sensitivity
- 4.2-ohm minimum impedance
- 25–130W amplifier recommendation
- 8.8kg per speaker
Duetto 40th
- Magellan 40th range
- Two-way standmount
- TZ2900PM-MG magnesium horn tweeter
- Advanced 165mm paper mid/bass
- 40Hz–30kHz ±3dB
- 88dB sensitivity
- 3.4-ohm minimum impedance
- 30–200W amplifier recommendation
- 16.8kg per speaker
The Duetto is considerably more than a deluxe Comète. It moves into Triangle's Magellan cabinet construction, crossover programme, AudioQuest internal wiring and dedicated high-end S08 support system.
Compare the Triangle Comète 40th Anniversary at Audio T.
Duetto 40th Versus Cello 40th
Duetto 40th
- Two-way standmount
- One 165mm mid/bass driver
- 40Hz–30kHz ±3dB
- 88dB sensitivity
- 16.8kg per speaker
- 30–200W amplifier recommendation
- Rooms approximately 15–40m²
- Dedicated S08 stands available
Cello 40th
- Three-way floorstander
- Dedicated 165mm midrange
- Twin 165mm SVA bass drivers
- 35Hz–30kHz ±3dB
- 90dB sensitivity
- 38.8kg per speaker
- 60–500W amplifier recommendation
- Rooms approximately 15–50m²
The Cello offers greater scale, bass extension and maximum output. The Duetto provides a smaller cabinet, greater positioning flexibility and the imaging advantages that can make a serious standmount particularly appealing.
Compare the Triangle Magellan Cello 40th at Audio T.
Speaker Positioning
The Duetto deserves the same care in positioning as a high-end floorstander.
Start by:
- Using stable stands of equal height
- Keeping left and right speakers reasonably symmetrical
- Leaving useful space from rear and side walls
- Avoiding tight room corners
- Positioning the tweeters sensibly relative to seated ear height
- Experimenting gradually with toe-in
Toe-In
The horn-loaded tweeter has controlled directivity, so speaker angle can noticeably affect imaging and high-frequency balance.
Listen for changes in:
- Central vocal focus
- Soundstage width
- Image depth
- Treble energy
Audio T Portsmouth: Large Standmount Speakers
The Magellan Duetto 40th was included in an Audio T Portsmouth comparison exploring why larger standmount speakers can be particularly effective in real listening rooms.
The article compares the Duetto with models from Harbeth, Dynaudio and Spendor and is useful if you are deciding whether a large standmount or floorstander makes more sense for your room.
Read Audio T Portsmouth's guide to large standmount speakers.
Who Is the Magellan Duetto 40th For?
Well Suited To
- High-end two-channel systems
- Rooms approximately 15–40m²
- Listeners who prefer standmount speakers
- Rooms where large floorstanders are impractical
- Quality integrated amplifiers
- Pre/power systems
- Vinyl systems
- High-resolution streaming systems
- CD and digital systems
- Jazz and acoustic music
- Rock and pop
- Classical music
- Listeners who value stereo imaging and focus
Check Before Buying
- Large 460mm-high standmount cabinet
- 350mm cabinet depth
- 16.8kg per speaker
- Proper stands are essential
- Dedicated S08 stands are extra
- 3.4-ohm minimum impedance
- Use a capable amplifier
- 80W power handling
- Positioning and toe-in deserve careful setup
Key Features
- Triangle Magellan Duetto 40th
- Magellan 40th Anniversary range
- Premium passive standmount speaker
- Two-way design
- Two drivers per speaker
- Front bass-reflex port
- TZ2900PM-MG tweeter
- 25mm magnesium dome
- Horn-loaded tweeter
- Phase plug
- Rear tweeter counter-cap
- 165mm mid/bass driver
- Natural cellulose-pulp diaphragm
- Progressive suspension
- Polypropylene anti-vortex cone
- Latex damping
- 40Hz–30kHz ±3dB
- 88dB/W/m sensitivity
- 8-ohm nominal impedance
- 3.4-ohm minimum impedance
- 30–200W recommended amplification
- 3.1kHz crossover
- SCR Audio crossover components
- French MKP capacitors
- Low-inductance ceramic resistors
- Large-section air-core coils
- AudioQuest internal wiring
- Long-Grain Copper
- Perfect-Surface Copper
- Curved HDF cabinet
- Successive 3mm cabinet layers
- Internal structural reinforcement
- S08 dedicated stand compatible
- S08 locking system
- S08 ballast compatible
- S08 SPEC centre spike
- S08 cable management
- Magnetic grilles
- Counter-spikes supplied
- 250mm width
- 460mm height
- 350mm depth
- 16.8kg per speaker
- Shadow Zebrano
- Golden Oak
- Space Black
- Space White
- Certificate of authenticity
- Made in France
Frequently Asked Questions
Is the Triangle Magellan Duetto 40th still current?
Yes. Triangle continues to list the Duetto 40th within its Magellan 40th range.
Is it sold as a pair?
Yes.
Is it a standmount speaker?
Yes. The Duetto 40th is a substantial standmount loudspeaker designed to be used on a suitable speaker stand.
Is it a two-way speaker?
Yes.
How many drivers are fitted?
Two per cabinet: one 25mm tweeter and one 165mm mid/bass driver.
What tweeter does it use?
The TZ2900PM-MG magnesium-dome horn tweeter.
What is the tweeter dome made from?
Magnesium alloy.
Does it use a horn?
Yes. The high-frequency driver is horn loaded.
What does the phase plug do?
It forms part of Triangle's high-frequency acoustic system and works with the horn profile to control dispersion and frequency response.
What is the mid/bass cone made from?
Cellulose pulp or natural paper.
Does the Duetto use the same SVA bass drivers as the Cello?
No. The Cello uses separate SVA sandwich-cone woofers. The Duetto uses one dedicated natural-paper mid/bass driver designed to cover a much wider frequency range.
How large is the mid/bass driver?
Approximately 165mm.
What is the frequency response?
40Hz to 30kHz ±3dB.
Does it need a subwoofer?
Not necessarily for most two-channel music. A subwoofer may be worthwhile if significantly deeper bass or home-cinema LFE reproduction is required.
Is the reflex port on the front?
Yes.
Can I put it close to a wall?
The front port offers useful flexibility, but nearby walls still affect the complete speaker's low-frequency output.
What room size does Triangle recommend?
Approximately 15–40m².
What is the sensitivity?
88dB/W/m.
What is the nominal impedance?
8 ohms.
What is the minimum impedance?
Approximately 3.4 ohms.
What amplifier power does Triangle recommend?
30–200W per channel into 8 ohms.
What is the power handling?
80W.
What is the crossover frequency?
Approximately 3.1kHz.
Who supplies the crossover capacitors?
Triangle developed the Magellan 40th MKP capacitors in collaboration with French specialist SCR Audio.
What internal wiring is used?
Triangle developed the Magellan 40th internal cable with AudioQuest using a combination of Long-Grain Copper and Perfect-Surface Copper.
How large is each speaker?
Approximately 250 x 460 x 350mm W x H x D.
How much does each speaker weigh?
Approximately 16.8kg.
Can I put them on a bookshelf?
Physically perhaps on a sufficiently large and strong piece of furniture, but these are substantial high-end standmount speakers and are better treated as dedicated stand-mounted loudspeakers.
Which stand does Triangle recommend?
The S08.
Are the S08 stands included?
No. They are sold separately.
Can the speaker be secured to the S08?
Yes. Triangle incorporates a locking system specifically for the Duetto 40th.
Can the S08 stand be filled with ballast?
Yes. Its sealed tubes can accept suitable granular ballast or Triangle's optional ballast balls.
How tall is the S08?
Approximately 680mm before spikes.
How large is the S08 base?
Approximately 450 x 420mm W x D.
Does the S08 hide speaker cable?
It includes rear cable management.
What is SPEC?
Triangle's Single Point Energy Conductor concept uses a defined mechanical grounding point to help manage vibration between the speaker support and floor.
Are grilles included?
Yes. Magnetic protective grilles are supplied.
Are floor-protection counter-spikes included?
Triangle supplies eight counter-spikes with the pair.
What finishes are available?
Shadow Zebrano, Golden Oak, Space Black and Space White.
Where are the Duetto 40th speakers made?
France.
Does it come with a certificate?
Yes. Triangle lists a certificate of authenticity among the supplied accessories.
What warranty does Triangle provide?
Triangle provides two years as standard. Eligible passive loudspeakers can receive an additional three years after registration, giving up to five years of cover subject to Triangle's current conditions.
Related Triangle Products and Audio T Guides
Why Buy From Audio T?
- Triangle Magellan demonstrations
- High-end amplifier matching
- Speaker-stand matching
- Triangle S08 setup advice
- Speaker-cable matching
- Room-positioning guidance
- Toe-in setup
- Subwoofer integration where appropriate
- Duetto, Cello and Comète comparisons
- Home demonstrations where available
- Part-exchange options
- Installation and ongoing after-sales support
Contact your local Audio T store to arrange a Triangle Magellan Duetto 40th demonstration or discuss amplifier matching, speaker stands and room positioning.