Legatus Prime Integrated
Tube-Hybrid Amplifier
The Essential Purist stepping into Absolute Musical Truth
The Architecture of Absolute Truth
The Legatus PrimeI Integrated Hifi Tube Amplifier is the foundational gateway into the uncompromised sonic world of Elysium Labs. Designed as the pure introductory masterwork in our lineup, the Legatus Prime series is engineered for the passionate music lover who demands true high-end emotional expression, pristine clarity, and bespoke engineering within a single, beautifully focused stereo architecture. It serves as an extraordinary time machine, capturing the artist’s true intent and delivering it unaltered into your listening sanctuary.
To achieve this exceptional level of performance, Kenneth Lin and his team designed the Legatus Prime around four core architectural tenets:
A Natural Tonal Balance: The Legatus Prime utilizes a meticulously neutral circuit layout and components selected for their low noise floor and lack of signature coloration. It provides a flawless, pristine blank canvas upon which the natural timbre of the music can paint itself.
Nuanced Dynamic Contrast: Driven by a highly optimized, lightning-fast power core, the Legatus Prime achieves an extraordinary level of transparency. By dropping the noise floor into complete obscurity, it unveils the most delicate musical subtleties—from the faint texture of a breath to the emotional cadence of a solo performance.
The Geometry of Silence: With an engineering focus on absolute phase linearity regarding both the primary signal and its complex harmonics, the Legatus Prime creates an incredibly stable, quiet background. This allows listeners to perceive not just the notes, but the physical space and profound silence between individual instruments.
Nimble and Precise Power Control: Backed by an agile and efficient power delivery system, the Legatus Prime commands real-world loudspeaker loads with absolute grip. Elysium’s precision circuitry delivers a remarkably high damping factor, ensuring tight, articulate speaker control seamlessly married to ultimate refinement and delicacy in musical presentation.
Over 100 Sonic Identities: The Modular Revolution
High-end audio has historically been rigid—locking listeners into a single sonic signature unless they buy a completely new amplifier. The Legatus Prime shatters this paradigm.
“Every classic vacuum tube possesses a unique, deeply emotional thumbprint—those coveted, pleasant second-order harmonics that breathe life, spatial dimension, and warmth into a recording.” — Kenneth Lin
The Legatus Prime, a hifi integrated tube amplifier features our revolutionary, hot-swappable Modular Voltage Amplification Stage (VAS). This futuristic architecture grants you a sustainable, uncompromised upgrade path. You possess the absolute freedom to experience a new tube’s distinct voice, harmonic profile, and performance characteristics whenever your musical mood changes—without ever replacing your entire system. Driven by Kenneth’s 25 years of research cataloging over a thousand vacuum tube circuit designs, Elysium Labs has engineered over 100 distinct tube modules to be released gradually, ensuring your musical ecosystem can evolve indefinitely.
The Output Stage: Painting on a "Clean White Canvas"
To deliver exceptional drive while safeguarding absolute signal purity, Elysium Labs integrates an ultra-precise, highly efficient current gain amplification module.
Operating with an impressively low distortion figure of -120dBr, the output stage behaves as a remarkably “Clean White Canvas.” Because the solid-state current amplifier introduces virtually zero color, distortion, or thermal lag of its own, it allows the rich, vivid brushstrokes of the Tube VAS Module’s pleasant 2nd-order harmonics to shine through with striking definition.
While our higher-tier systems—the Olympus Elite and Imperium Supreme—scale into the absolute black-hole depths of our flagship -130dBr NCOREx monoblock architecture, the Legatus Prime hifi tube amplifier sets an astonishingly pure, transparent standard that redefines what is possible for a single-chassis integrated amplifier in its class.
Defeating Unwanted Distortion, Preserving the Soul
Traditional tube amplification often relies on legacy resistor loaded anode-follower technology, which introduces warmth-robbing artifacts and intermodulation distortion that mask the music. The Legatus Prime conquers this by employing our proprietary, high-tech topology that completely flattens the load-line of the Tube Bias. This engineering milestone suppresses highly linear 3rd Harmonic distortion to a vanishingly low -100dBr (<0.001%), leaving the audio signal completely clean of intermodulation wreckage.
Simultaneously, the Tube VAS section is engineered to an ultra-low output impedance of 150 Ohms, creating a heavenly, unhindered match with the current amplification stage. This ensures that the lowest bass registers emerge as articulate, rock-solid musical notes rather than indistinct punches, allowing the amplifier to deliver highly responsive power alongside the delicate, expansive soul of the music.
The Power Supply: Masterful Voltage Buffer Filtration
At Elysium Labs, we reject “brute force” power methodologies like excessive filtration or relying blindly on boutique components to mask a flawed circuit. We believe in the masterful management and purification of power.
True Dual Mono Single-Chassis Architecture
The Legatus Prime embodies a true dual mono topology, housing two completely independent channels within a single, elegant chassis. This rare and ambitious engineering approach ensures total internal isolation of both the left and right audio signals and their respective signal grounds. Crosstalk is virtually eliminated, allowing the amplifier to deliver blacker backgrounds, wider channel separation, and deeply precise stereo imaging.
Isolated Power Blocks
Within the single Legatus Prime chassis lie independent power supply circuit blocks designed to isolate the delicate Tube VAS Input Stage from the high-current Output Stage. Feeding these stages individually allows for precise fine-tuning, minimizing internal interaction and keeping the noise floor incredibly quiet.
Cascading Multi-Stage “Voltage Buffer” Circuit
Fine-tuned via high-sampling-rate, Long FFT Length audio spectrum analyzers and perfected by thousands of hours of critical human listening, the Legatus Prime power supply swings effortlessly with the exact timing of the music.
Elysium Labs’ proprietary Cascading Multi-Stage Filtered Power Supply systematically eradicates noise without choking the life out of the music. Sharing the exact design DNA of our upper-tier models, this circuit incorporates high-grade mini choke inductors along with premium Epcos filtering capacitors to form a highly optimized Voltage Buffer network. This complex arrangement guarantees an incredibly high signal-to-noise ratio, maximizing clarity, transient speed, and dynamic range.
Extreme Component Selection
When components are matched to extreme tolerances and implemented properly, they unlock a level of performance standard HiFi companies cannot reach. Every single resistor and capacitor on the main board is purchased in quantities of many thousands, individually pre-measured, and meticulously sorted into groups with an accuracy rating between 0.1% and 0.001%. This exhaustive quality control ensures that even our most streamlined integrated amplifier performs at its absolute, optimal peak. Every attention to every detail MATTER, That is The Elysium Labs Legatus Prime Series a true Hifi Tube Amplifier.
Voicing: The Harmony of "Correct" and "Right"
The Art of “Correct” (Engineering Precision):
Symmetrical voltage swings, optimized bias, and perfectly calibrated load lines establish a technically flawless foundation with a perfectly linear frequency response and next to non-existent intermodulation distortion.
The Alchemy of “Right” (Acoustic Tuning):
Because every resistor and capacitor carries inherent parasitic capacitance and induction that introduces “sonic colors,” Kenneth Lin treats component selection like an alchemist compounding gold. Carbon composites, carbon film, tantalum, high-precision metal foils, and premium Epcos capacitors are systematically chosen for the unique tonal color they add to the sonic palette, ensuring the amplifier sounds deeply emotional, precision-accurate, and intensely musical.
The Voice of Legatus Prime
Musicality: The Legatus Prime reproduces music in a deeply engaging way by preserving all recorded information. It captures the tunefulness, the raw musical contrast, the perfect timing, and the intact harmonics exactly as they were captured during the original recording session.
Soundstage: The dual mono stereo architecture renders a vast, holographic sense of space. Its ability to separate individual instruments across a wide stereo image is incredibly accomplished for a single-chassis component.
Power & Authority: Delivering a focused 300W peak at 2Ω (140W at 4Ω / 70W at 8Ω), it drives real-world high-fidelity loudspeakers with absolute poise, agility, and transient speed. While our massive Olympus Elite and Imperium Supreme monoblocks step in to conquer ultra-reactive or massive multi-driver floorstanders with limitless current reserves, the Legatus Prime provides gorgeous authority and breathtaking grip for fine acoustic setups.
Transparency: Low distortion is mandatory for any competent high-end audio system. The Legatus Prime allows you to immediately and effortlessly connect with the touch of the instruments, the ambient room acoustics, and the playfulness of the artist right in front of you.
Balance: By striking a masterful balance of old and new, slow and fast, hard and soft, the Legatus Prime presents your music as a beautiful, holistic whole.
© Copyright by Elysium Labs.
Technical Specifications
| Specification | Value |
| Default Tube Module | 6AH6 Tube VAS Module |
| Input Type | Balanced XLR and RCA |
| Input Impedance | 100K |
| Signal Input Sensitivity | 1v RMS |
| Load Impedance Compatibility | 4 / 8 / 16 Ω |
| Output Impedance (Internal Resistance) | 0.002 Ω |
| Damping Factor | 800 |
| Power Rating | 300wat 2 Ω / 140w at 4 Ω |
| Frequency Response | 2 - 200,000 Hz |
| Dimensions (W x H x D) | 480 x 380 x 165 mm (Per Chassis) |
| Weight | 30.0 Kg |
| Mains Input Voltage | 115 or 230 VAC |
| Mains Fuses | Slow Blow T5A |
| Power Consumption | 40 W (Idle) - 300W(Peak) |
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