Oriolus Luxury&Precision EA4

Revolutionizing Audio with L&P Circuitry × Pure Japanese Vacuum Tube Technology

To commemorate the 10th anniversary of the LUXURY&PRECISION Rakubi brand, the long-awaited high-power portable vacuum tube amplifier is finally here—following nearly two years of development.

Bringing together a wealth of discrete analog design and custom circuitry, the amplifier introduces an industry-first level of personalization, ensuring optimal synergy with a wide range of IEMs and headphones.

Key Technical Highlights

• Precision-tuned tube preamp stage with high-voltage supply directly to the anode for optimal tube performance.
• Fully discrete constant current source circuitry for precise and linear operation.
• Dual-mode configuration (ILA/ILH) combined with 2-stage input/output gain, allowing a total of four personalization modes.
• 12 Panasonic film capacitors used for coupling in the vacuum tube preamp stage.
• Specially tuned linear regulators optimized for the natural resonant frequency of the tubes.
• CNC-machined dual metal shielding and protective cover for vacuum tube shielding and safety.
• Anti-resonance design with 8 high-damping silicone buffers on each side for vibration isolation.
• Dual independent high-output positive/negative power rails for improved bandwidth and dynamics.
• Discrete headphone amplifier power filtering via 16 Nichicon audio-grade 10×12.5mm aluminum electrolytic capacitors.
• Selectable ±13V or ±15V power supply for the headphone amplifier stage.
• Powered by six Panasonic 18650 low-impedance battery cells, selected and matched to ensure <0.5 mΩ of internal resistance difference.
• The discrete headphone amplifier employs eight TO-252 power transistors.
• Features 24 precision resistors (250mW / 0.5% accuracy) with low-temperature-drift alloy in the emitter path of large-signal transistors.
• Switchable Class AB / Class A operation, with 11 steps of adjustable quiescent current levels.
• Supports two modes of output architecture: Pure Vacuum Tube Preamp Mode and Vacuum Tube Preamp + Discrete Headphone Amp Mode.
• Volume control design and potentiometer mechanism are evolved from the LP6Ti 7Anv system, offering refined performance.

Balanced headphone output power: 6,800mW @ 32Ω and 1,200mW @ 300Ω

The amplifier is not merely an amplifier—it's a statement in modern audio engineering. With unmatched build quality, innovative discrete circuitry, and genuine Japanese vacuum tube integration, it redefines what is possible in portable high-fidelity audio.

For pre-orders, please be advised that fulfillment will take a minimum of one month, as each unit is carefully prepared to meet our quality standards.