Avantgarde Acoustic UNO SD
The UNO SD delivers seamless subsonic bass, startlingly natural midrange and a vast, precisely layered soundstage that makes its horn-plus-active-bass design disappear. Tom Lyle found its low end tight, mighty and fully integrated, while lifelike instruments and clean treble bring live-scale immediacy without the old-school horn coloration. It is a lavish, high-sensitivity statement speaker for immersive full-range listening.
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Deliciously Crispy
Sound Quality
95/100
Build Quality
86/100
Value for Money
85/100
Pros
Powered bass reaches convincingly deep while staying tight, quick and seamlessly integrated with the horn drivers.
Exceptionally realistic, uncolored midrange avoids the cupped-hands character associated with older horn designs.
Creates a gigantic, finely separated soundstage while allowing the speakers and individual drivers to disappear.
Cons
Large physical dimensions and visually bold horn architecture may not suit every room or décor.
Its $48,800 price places it firmly in luxury-system territory.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 95/100
The UNO SD delivered an unusually seamless, full-range presentation in this review, combining deep active bass with lifelike horn midrange and treble. Its ability to disappear while projecting a huge, precisely organised soundstage was a particular highlight.
Bass
97/100
The powered low end was described as superb, extending credibly to subsonic depths while remaining tightly controlled through the midbass. The reviewer heard no separation between the subwoofer and horn system, praising mighty deep bass, convincing transient response, and exceptionally realistic jazz bass and drums.
Mid
96/100
Midrange reproduction was among the reviewer's strongest praises, making individual instruments sound exceptionally realistic within the large stage. Earlier Avantgarde concerns about a "cupped hands" coloration were explicitly absent, with the UNO SD portrayed as open, natural and highly convincing.
Treble
94/100
The review describes cymbals as incredibly lifelike and captures saxophone reverberation as a convincing aura around the instrument. Those observations point to clean, resolved high frequencies with strong tonal realism rather than overt sharpness.
Soundstage Imaging
96/100
The UNO SD separated instruments clearly and placed them across what the reviewer called a gigantic soundstage. The speakers were also said to almost disappear, leaving the physical locations of the drivers inconsequential to the musical illusion.
Dynamics
92/100
Low-frequency dynamic impact was especially persuasive: the reviewer could not only hear the deepest notes but physically feel them. Tight bass transients and the system's realistic portrayal of drums suggest strong scale and physical expression, though the review offers less direct discussion of large-scale dynamics above the bass region.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
86/100
The review sample made a strong visual impression, with a stunning appearance and attractive piano-black lacquer cabinets. The review says little about cabinet internals, hardware durability or long-term ownership quality.
Value for Money
85/100
At $48,800 per pair, the UNO SD is firmly a luxury purchase. Even so, the reviewer said that, if able to raise the funds, he would buy the UNO SD or a higher model in the Avantgarde range; there is no direct comparison with competing speakers at this price.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
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Specifications
- Frequency range satellite
- 290-22,000 Hz
- Frequency range subwoofer
- 18-350 Hz
- Power handling
- 50 Watt
- Sensitivity (1 Watt/1 m)
- > 107 dB
- Crossover frequencies
- 290/2,800 Hz
- Nominal impedance
- 18 Ohm
- Recommended amplifier power
- > 10 Watt
- Recommended room size
- > 16 sqm
- Coplanar driver alignment
- yes
- OmegaDrive
- yes
- AirGate
- yes
- NatureCap incl. PolarizationPlus circuitry
- yes
- Horn type
- spherical horn
- Horn aperture angle
- 180 degrees
- Horn diameter midrange
- 500 mm
- Horn diameter tweeter
- 160 mm
- Diameter midrange
- 127 mm / 5 inches
- Diameter tweeter
- 25 mm / 1 inch
- Driver size
- 250 mm / 10 inches
- Number of drivers
- 1x XB10
- Voice coil diameter
- 153 mm
- Flux density
- 1.15 Tesla / 480 mm
- Pole plate
- low carbon steel
- Membrane material
- Paper/carbon fiber compound
- Output power (RMS)
- 1x 500 Watt
- Digital crossover
- DSP
- Equalizer
- 8 Band EQ
- Digital room adjustment
- yes
- Inputs
- 1 x SPKR + 1 x XLR
- iTRON voltage/current converter technology
- patented
- Fully balanced circuit
- yes
- Single-ended circuit
- yes
- Zero feedback
- yes
- Without negative feedback
- yes
- Power
- 2 x 100 Watt
- High Performance Multi Contact Connector
- yes
- Semi-active version
- yes
- Fully active version with iTRON amplifier
- yes
- Dimensions width
- 500 mm
- Dimensions depth
- 615 mm
- Dimensions height (+/- 10 mm)
- 1,355 mm
- Weight
- 81.5 kg
Manufacturer's Description — Avantgarde Acoustic
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Authorized dealers for Avantgarde Acoustic UNO SD
- The ASOC Gallery of Fine Audio — in-store — Stratford, Ontario, Canada (website)
- Alpha High End — online and in-store — Brasschaat, Vlaams Gewest, Belgium (website)
- American Sound — in-store — Richmond Hill, Ontario, Canada (website)
- Audio Concept - Luxembourg — in-store — Gare, Luxembourg, Luxembourg (website)
- Audio Gallery — online and in-store — Las Rozas de Madrid, Comunidad de Madrid, Spain (website)
- Audio Revolutions — in-store — Khwaeng Thung Phaya Thai, Krung Thep Maha Nakhon (website)
- Audiogears — in-store — Casalecchio di Reno, Emilia-Romaña (website)
- Auditorium — in-store — Hamburg-Mitte, Hamburg, Germany (website)
- Aug & Ohr — in-store — Zürich, Zürich, Germany (website)
- AURA HIFI — in-store — Stadtbezirke II, Nordrhein-Westfalen, Germany (website)
and 30 more verified dealers