Feliks Audio ARIOSO 300B
The Arioso 300B delivers expansive imaging and expressive tone with speed and control that defy soft-focus tube stereotypes. Twittering Machines noted its exceptional scale, color and dimensionality, while Audiophiliac praised its transparent articulation. This hand-built, point-to-point Class A design excels with sensitive loudspeakers, bringing vivid dynamics and lifelike presence.
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Deliciously Crispy
Sound Quality
94/100
Build Quality
94/100
Value for Money
85/100
Pros
Expansive, precisely layered soundstage with vivid dimensionality and stable image placement.
Pure, articulate and richly colored sound avoids the overly soft or romantic character associated with some tube amplifiers.
Handcrafted point-to-point construction and internal build quality earned exceptional praise.
Cons
Its 8W output demands high-sensitivity loudspeakers and offers less comfortable high-volume headroom than more powerful amplifiers.
Connectivity is deliberately minimalist, limited to three RCA inputs with no digital inputs, Bluetooth, DSP or room correction.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 94/100
Reviewers describe an unusually vivid, controlled and spacious 300B presentation rather than a soft-focus or overly romantic tube sound. Its strongest results come with suitably sensitive loudspeakers, where it combines tonal color and delicacy with convincing control, speed and scale.
Transparency Resolution
95/100
Audiophiliac calls the presentation highly addictive for its pure, “see-through” character, speed and articulation, and found vocal expression unusually revealing. Twittering Machines likewise heard stunning clarity in complex recorded space, with distinct light-and-dark tonal textures preserved.
Tonal Balance Musicality
94/100
The Arioso is praised for beautiful, full-spectrum tone and rich, dense color, yet reviewers stress that it avoids excess or a stereotypically lush vintage-tube balance. It is described as musical and involving, with a muscular character that still retains subtlety and natural expressive shading.
Dynamics
93/100
Despite its modest 8W output, the amplifier was repeatedly heard as firm, controlled and quick with compatible speakers. Twittering Machines found it nimble through abrupt blasts and booms, while Audiophiliac heard greater awareness of subtle dynamic shifts and more lifelike shading from the 4-ohm tap.
Soundstage Imaging
96/100
Spatial performance is a major strength. With DeVore O/96 loudspeakers, Twittering Machines heard sound extending far beyond the speaker positions, with startlingly solid images, specific locations for performers and a recording space rendered with exceptional dimension.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
94/100
The Arioso is hand-assembled in Poland with point-to-point wiring, substantial 25kg construction and a single-ended Class A 300B architecture. Audiophiliac describes the internal execution as extraordinary and work-of-art-like, while the review unit’s physical heft reinforces the impression of serious engineering.
Value for Money
85/100
At a reviewed price of $6,699, the Arioso is a premium specialist amplifier whose low-power design calls for careful speaker matching. The reviews are enthusiastic about its performance, but neither offers a direct comparison of its asking price with competing amplifiers or a clear value judgment.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
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Specifications
- Weight
- 25 kg
- Dimensions
- 41 × 38 × 21 cm
- AC Voltage
- 230V, 120V
- Impedance
- 100 K Ohm
- Frequency response
- 15 Hz – 32 Khz +/- 3 dB
- Power output
- 2x 8W
- Speaker output
- 4 and 8 Ohm
- Input sensitivity
- 1V RMS
- THD
- 0,3% 1KHz at output power =1W i 2,5% 1KHz at output power =8W
- Input selector
- 3 RCA inputs to choose from panel or remote
- Full remote control
- ON-OFF,selector, vol+ – vol- ,mute
- Power consumption
- 140VA
Manufacturer's Description — Feliks Audio
Single ended A-class tube amplifier
- Engaging, fast and neutral sound signature – 300B single ended magic at its best
- Handcrafted with passion from carefully selected hi-end components and with maximum attention to details
- Perfect match for high efficiency speakers to recreate live-like music experience
Verified Dealers
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Authorized dealers for Feliks Audio ARIOSO 300B
- Addicted to Audio — online and in-store — Epping, Victoria, Australia (website)
- ARK Audio — online and in-store — Borensberg, Östergötlands län, Sweden (website)
- Audeos — online and in-store — Żywiec, Województwo śląskie (website)
- Audio 46 — online and in-store — New York, New York, United States (website)
- Audio essence — online and in-store — Zürich, Zürich, Switzerland (website)
- AudioPerformance — online and in-store — Stenkullen, Västra Götalands län, Sweden (website)
- Bloom Audio — online and in-store — Gibbsboro, New Jersey, United States (website)
- CASQUES HEADPHONES — in-store — Lyon, Auvergne-Rhône-Alpes, France (website)
- Dedicated Audio — online and in-store — Scottsdale, Arizona, United States (website)
- Ears Unlimited — online and in-store — Delft, Zuid-Holland, Netherlands (website)
and 17 more verified dealers