Octave Audio V 40 SE
The V 40 SE blends lush vocal warmth with punchy, extended bass, crisp treble and a vivid sense of scale—tube charm without excessive softness. Pursuit Perfect System admired its rhythmic clarity and easy ownership, while Stereophile highlighted its deep, forward soundstage. HT bypass and intuitive bias adjustment make this a notably adaptable valve integrated.
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Nicely Roasted
Sound Quality
91/100
Build Quality
91/100
Features Connectivity
83/100
Value for Money
87/100
Pros
Balances sweet, lush vocals with neutral-leaning clarity, detailed treble and lively rhythmic drive.
Delivers full, punchy bass, strong stage depth and above-average scale.
Easy tube ownership through clear LED bias indication, adjustable bias and broad speaker compatibility.
Useful HT bypass and Eco mode add uncommon practicality to a tube integrated.
Cons
Forward, extended treble presentation demands sympathetic source and speaker matching; harsh digital gear can be exposed.
No built-in phono stage, so turntable users need an external phono preamplifier.
Bass control can vary with speaker pairing and depends on correct tube bias.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 91/100
Reviews describe a lively, clean and involving tube amplifier that avoids an overly soft or romantic presentation. Its strengths are vocal sweetness, extended and detailed treble, punchy bass, strong timing, and a spacious presentation with notable depth; system matching is important because the sound is forward and revealing of poor digital sources.
Transparency Resolution
90/100
Stereophile found the V 40 SE enjoyably vivid, with extended treble, while Pursuit Perfect System heard good treble detail and clear separation in layered vocal material. It is revealing enough that Stereophile advises care with harsh-sounding digital sources and cartridge matching.
Tonal Balance Musicality
91/100
The overall balance is described as reasonably neutral rather than excessively “tubey,” but with a meaningful dose of sweetness. Reviewers particularly praise the lush, gratifying vocal midrange and the easy, satisfying character at both normal and higher volumes; Stereophile notes tonal colours are not as saturated as those of the very best separate amplifiers.
Dynamics
92/100
Pursuit Perfect System reports full, punchy and well-extended bass, plus very good timing, urgency and intensity when the music demands it. It handled shifts between relaxed, rhythmic material and more forceful layered tracks superbly, although bass control varied somewhat with speaker choice and correct tube bias.
Soundstage Imaging
91/100
Stereophile heard excellent stage depth and a better-than-average sense of scale, despite the amplifier's up-front perspective. Pursuit Perfect System also found good soundstage clarity, helping the amplifier present complex music with a coherent and engaging sense of space.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
91/100
The V 40 SE is hand-built in Germany, and Octave winds its own transformers in-house. Review coverage also highlights thoughtful ownership provisions including individual tube-bias indication and adjustment, along with protection circuitry and an Eco mode intended to reduce tube wear and heat.
Features Connectivity
83/100
This is primarily an analogue line-level integrated amplifier, with five RCA inputs, a record output, adjustable pre-out, loudspeaker outputs, and a full-metal volume remote. The home-theatre bypass is an unusually useful inclusion for a tube amplifier, but there is no built-in phono stage, DAC, headphone output, balanced connection or streaming facility.
Value for Money
87/100
At approximately £4,200 in the reviewed configuration, it is positioned as a serious purchase rather than an entry-level amplifier. Pursuit Perfect System nevertheless considers it a strong place to start with tube amplification, citing its approachable operation and balanced blend of tube sweetness with solid-state-like drive; the reviews offer no direct price comparisons with competing models.
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Specifications
- Basic model
- V 40 SE Line
- Design
- Silver or Black
- Tube Configuration
- 4 x 6550 JJ
- Inputs
- 5 x RCA (including one home theatre bypass input)
- Outputs
- 1 x RCA record output / 1 x regulated preamplifier output / 1 x loudspeaker output
- Dimensions
- 408 x 159 x 490 mm (W x H x D)
- Weight
- 18.0 kg
- Full metal remote control
- Volume control
- Eco mode
- Power saving mode
- Bias control
- Bias current control
- Adjustable Pre-Out
- Preamp output RCA
- HT Bypass
- Bypass-function for multichannel/home cinema
- Protection System
- Soft Start; Protection circuit for device and output tubes
- Output power
- 40 W RMS, 50 W / 4 ohms
- Frequency response
- 20 Hz – 70 kHz
- Total harmonic distortion
- < 0.1 % @ 10 Watt into 4 ohms
- Signal-to-noise ratio
- -100 dB / 40W
- Amplification
- 38 dB
Manufacturer's Description — Octave Audio
The V 40 SE is a line level integrated amplifier with 2 x 40 W peak output power. He is a further development and direct descendant of the successful V 40 and V 50 amplifier models. His powerful, clear bass fundamentals and his captivating resolution in the high frequencies win much respect.
His unique features lift the V 40 SE into the 21st Century, while his performance earned him the rare “Stereoplay Highlight” (issue 07-2009), a prestigious award bestowed by the German high-end audio magazine Stereoplay
The V 40 SE output stage consists of two power pentodes (Type 6550 JJ) for each channel. Due to the BIAS Control and Monitoring System, the use of other pin-compatible output tubes is possible to match the amplifier to personal taste, or to benefit from new or improved tubes.
Like all OCTAVE amps the V 40 SE is based on the enhanced pentode configuration. This configuration ensures the absolute stability of the amplifier against the unstable impedance of the loudspeaker. Impedance mismatch is without consequence and the V 40 SE is stable down to a 2 ohms load.. An important contributor to this stability is the single impedance output transformer.
The V 40 SE is the perfect amp for speakers with an average efficiency rating. But not only is the low impedance capability an advantage, with his exceptional Signal-to-Noise ratio of –110dB / Full Power he is also an ideal partner for high efficiency loudspeakers.
Of course, the V 40 SE features the Power Management with the Soft-Start-Electronics, the Protection SystemEco ModeBIAS Setting and Display, a Monitor/Record Output, the HT Bypass, the Pre-Out and a (Super) Black Box Connection. (See Technology for description)
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Authorized dealers for Octave Audio V 40 SE
- Holt Hill — online and in-store — Andover, Massachusetts, United States (website)
- A 10 Audio Room 4 Music — in-store — Amsterdam Nieuw-West, Noord-Holland, Netherlands (website)
- Addicted to Audio — online and in-store — Epping, Victoria, Australia (website)
- Akoustiki Kritis — online and in-store — Glifada, Greece (website)
- Alta Fedelta — online and in-store — Lombardia, Italy (website)
- Audio Basic — in-store — Singapore, Singapore (website)
- Audio Element — in-store — Pasadena, California, United States (website)
- Audio Philosophy — in-store — Baton Rouge, Louisiana, United States (website)
- Audio Tempel — online and in-store — Zwolle, Overijssel, Netherlands (website)
- Audio Vision San Francisco — online and in-store — San Francisco, California, United States (website)
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