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Overview
MediiisthecontrolcentreoftheLunaSeries–areferencepreamplifierthatpreservesmusicalintegrity,withoutconventionalattenuation,imposedcharacter,ortonalmanipulation.
Key Features
Defining characteristics
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Advanced New Old Stock Valve Topology
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Fully Isolated, Off-Grid Power System
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Pure Silver Signal Path
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Multi-Layer Resonance-Controlled Chassis
Pure Signal. Absolute Control.
A preamplifier occupies one of the most sensitive positions within the audio system. Any compromise introduced is carried forward and amplified by every stage that follows. Luna Medii was engineered from a singular objective: to manage level, drive, and system interaction without damaging the musical integrity of the incoming signal. The result is a complete rethinking of conventional preamplifier design in pursuit of absolute signal preservation.
Craftsmanship
Musicality without Nostalgic Colouration.
Within the Medii, NOS valves are treated not as character pieces, but as precision analogue elements operating within a tightly controlled architecture. The hand-selected GE5670 valves preserve harmonic integrity, dimensional realism, and low-level continuity without imposing an obvious sonic signature. The result is not warmth for its own sake, but silence and stillness – allowing reverberation, phrasing, ambience, breath, and micro dynamic movement to emerge naturally.
Patented Zero In-Line Element Volume ArchitectureAdvanced New Old Stock Valve TopologyFully Isolated, Off-Grid Power SystemPure Silver Signal Path
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A Fully Isolated Power Environment.
In a highly resolving preamplifier, mains-borne interference rarely presents itself as obvious hum or hiss; more often, it appears as subtle modulation, obscuring special calm, blurring microdynamics and hardening tonal textures. Medii’s fully isolated off the grid power architecture separates the analogue control stage from the mains, ultimately preventing charging-event artefacts from modulating sensitive circuits. This is not “enhanced filtering”. It is the complete elimination of mains-borne noise on the audio line.
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Control Without Intrusion
Zero In-Line Volume
Medii's patented Zero In-Line Element Volume Control rejects the conventional approach of placing attenuation directly in the musical signal path. Whether resistive, transformer-based, relay-controlled, active, or digital, traditional volume controls inevitably become a point of compromise. By controlling level without introducing a conventional attenuation element, Medii preserves continuity, dynamic expression, and tonal integrity across the entire listening range.
Musicality Without Colouration
Precision Valve Architecture
Within Medii, NOS valves are not employed as nostalgic character devices, but as precision analogue elements operating within a tightly controlled architecture. Hand-selected GE5670 valves preserve harmonic structure, dimensional realism, and low-level continuity while avoiding the obvious sonic signature often associated with traditional valve designs. The objective is not warmth for its own sake, but the preservation of natural musical flow and spatial coherence.
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Electrical Silence
Off-Grid Power System
Medii's fully isolated power architecture separates the analogue control stage from the mains itself. This is not enhanced filtering or more sophisticated regulation; it is the complete removal of mains-borne noise, RF contamination, and charging-event artefacts from the audio line. By preventing interference before it enters the system, Medii creates the stable electrical environment required for true low-level resolution and dynamic freedom.
A Physical Architecture of Silence
Resonance-Controlled Construction
The Medii chassis is engineered as an active part of the signal-preservation strategy. A composite structure of copper, aerospace-grade aluminium, polymer isolation layers, and vibration-dissipating materials controls resonance, electromagnetic exposure, and mechanical energy before they can influence the circuitry. Every material is selected for a specific engineering purpose, creating a physically stable environment in which the analogue architecture can perform without disturbance.
Technical Excellence
Engineered beyond conventional preamplifier design.
Most preamplifiers begin with a compromise: the insertion of an attenuation element directly into the signal path. Whether resistive, transformer-based, relay-controlled, active, or digital, every conventional volume architecture alters the very signal it seeks to control. Medii was engineered to solve this problem at its source. Its patented Zero In-Line Element Volume Architecture regulates level without introducing a conventional attenuation stage, preserving continuity, dynamic expression, and tonal integrity across the entire listening range. This architecture is supported by a fully isolated off-grid power system, hand-selected NOS valve topology, pure silver signal conductors, and meticulously matched components throughout the signal path. Together they form a preamplifier whose objective is not enhancement, but preservation, maintaining the original structure, timing, and emotional intent of the recording with extraordinary precision.
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Command. Without influence.
Medii controls the system without imposing itself upon the music, preserving the relationship between performer, recording, and listener.
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Silence, perfected.
When interference is removed, the smallest details become meaningful. Space expands, timing stabilises, and music breathes naturally.
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Pure signal. Absolute control.
A preamplifier conceived not as an effect, but as an instrument of preservation - maintaining the integrity of every recording that passes through it.
Specifications - Luna Medii
OVERVIEW
- Product Type
- Reference Preamplifier / Control Stage
- Series
- AMR Audio Luna Series
- Core Design
- Zero in-line element volume control - world-first patented architecture
- Production Limit
- Limited to 186 units
SIGNAL PATH
- Internal Wiring
- Pure silver conductors
- Wiring Architecture
- Short, direct routing; separated analogue/power/control domains; mirrored L/R channels
- Output Connections
- Balanced (XLR) + Single-Ended (RCA) - both reference-quality
- Connectors
- High-purity conductor, low contact resistance, stable clamping geometry (WBT-class)
VOLUME CONTROL
- Technology
- World-first patented Zero In-Line Element Volume Control
- Method
- No potentiometer, no stepped attenuator, no series attenuation element, no volume ICs
- Architecture
- Gain-based control - wire with gain; level managed without signal-path attenuation
POWER & ISOLATION
- Power Architecture
- AirLock™ - Fully Isolated off-the-grid Power Supply
- Isolation Goal
- Removes the mains environment from the musical circuit
- Capacitors
- Custom AMR Teflon + Custom AMR Filmcaps
ANALOGUE STAGE
- Amplification
- Advanced NOS tube architecture
- Tube Type
- NOS (not modern production), computer-matched
- Design Goal
- Organic presence from a black, quiet foundation - not tube coloration
- Resistors
- Tantalum (hand-matched)
- Component Matching
- Hand-matched for channel symmetry; precision computer-aided matching
CONSTRUCTION
- Chassis
- Solid copper inner chassis + aerospace-grade aluminium outer + synthetic thermoplastic polymer underlayer + polysiloxane sheets
- Chassis Purpose
- Controls tube microphony, resonance, and EMI; mechanically inert structure
- Passive Components
- Audio Note Silver Tantalum resistors, custom Teflon capacitors
- PCB Material
- Low-dielectric PCBs; non-magnetic screws
Gallery
Luna Medii
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