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Audio Research VSI60 with KT120 Tubes
• Overview – Audio Research VSI60, released in 2013, is a Class AB tube integrated amplifier using KT120 output tubes, combining preamplification and power amplification to deliver refined tube musicality with modern drive capability.
• Amplifier Topology – Designed with a fully balanced tube signal path, it delivers exceptional transparency, wide dynamic range, and authoritative bass control, bridging classic Audio Research voicing with contemporary loudspeaker compatibility.
• System Integration – Audio Research VSI60 with KT120 Tubes offers multiple line-level inputs and balanced XLR connectivity, making it a flexible centerpiece for high-end analog and digital systems seeking coherence, scale, and tonal accuracy.
• Specifications – Rated at 50 watts per channel into 8 ohms, employs four KT120 output tubes, 6H30 driver tubes, fully balanced circuitry, wide bandwidth response, and high-current power supply for stable load handling.
• Dimensions – Approx. 483 mm (W) × 197 mm (H) × 394 mm (D), featuring Audio Research’s contemporary industrial design with effective ventilation and compatibility with standard hi-fi equipment racks.
• Weight – Approximately 23 kg, reflecting substantial transformers, robust chassis construction, and premium internal components essential for reliable thermal management and consistent high-performance tube operation.
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Audio Research LS16 Tube Preamp
• Overview – Audio Research LS16 Tube Preamp, released in 1999, is a fully balanced solid-state and tube hybrid line-stage preamplifier using vacuum-tube gain stages to deliver classic Audio Research neutrality with musical warmth and dynamic authority.
• Circuit Design – Built around a dual-triode tube topology with balanced architecture, it offers exceptional transparency, wide bandwidth, and low noise, making it ideal for revealing power amplifiers and high-resolution source components.
• System Matching – The Audio Research LS16 Tube Preamp excels in resolving micro-detail and soundstage depth while maintaining tonal balance, pairing especially well with both tube and solid-state power amplifiers in reference-level systems.
• Specifications – Utilises four 6922 dual-triode tubes, fully balanced outputs, multiple single-ended and XLR inputs, low output impedance, and high voltage regulation for stable operation and consistent sonic performance.
• Dimensions – Approx. 483 mm (W) × 133 mm (H) × 356 mm (D), housed in Audio Research’s classic brushed-aluminium chassis designed for proper ventilation and rack-friendly installation.
• Weight – Approximately 10 kg, reflecting a robust internal power supply, shielded circuitry, and solid mechanical construction that supports long-term reliability and low microphonic behaviour.
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Unison Research Triode 20
• Overview – Unison Research Triode 20, released in 2003, is a pure Class A, tube-based integrated amplifier using triode operation, delivering low-power purity with exceptional tonal richness and harmonic realism.
• Triode Amplification – Designed around triode-connected output tubes, it prioritises linearity and natural timbre, producing an intimate, fluid presentation that excels with high-efficiency loudspeakers and acoustic music reproduction.
• Italian Craftsmanship – The Unison Research Triode 20 features hand-built construction, point-to-point wiring, and a solid wooden chassis, combining traditional valve engineering with distinctive Italian aesthetic refinement and long-term reliability.
• Specifications – Rated at approximately 20 watts per channel into 8 ohms, employs triode-configured EL34 output valves, tube rectification, minimalist circuit topology, and short signal paths to preserve signal purity and dynamic coherence.
• Dimensions – Approx. 420 mm (W) × 200 mm (H) × 360 mm (D), with a compact yet substantial chassis designed to accommodate tube ventilation while fitting comfortably on standard hi-fi equipment racks.
• Weight – Approximately 25 kg, reflecting heavy transformers, solid hardwood enclosure, and robust internal components essential for stable Class A tube operation and mechanical resonance control.
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Audio Research I/50
• Integrated Tube Design – The Audio Research I/50 is a Class A/B tube integrated amplifier featuring optional DAC and phono modules, offering refined musicality, smooth harmonic texture, and exceptional versatility for modern audiophile systems.
• Tube Performance Transparency – With 6550WE power tubes and 6922 input stages, the Audio Research I/50 delivers excellent linearity, low distortion, and a rich tonal balance that enhances microdetail, depth, and dynamic expression.
• Upgradeable Architecture – The I/50 provides modular expansion for digital and analogue inputs, allowing Audio Research I/50 owners to tailor system functionality while preserving ARC’s signature sonic refinement and long-term reliability.
• Precision Build Quality – Handcrafted in Minnesota, the I/50 features stabilized power regulation, quiet cooling, and intuitive capacitive controls, ensuring consistent performance, operational stability, and superior tube lifespan.
• Dimensions – Approx. 419 mm (W) × 337 mm (D) × 196 mm (H), with a compact footprint optimized for rack placement while maintaining proper airflow for tube cooling.
• Weight – Around 18 kg, offering solid mechanical stability that reduces vibration, enhances tube performance, and contributes to the amplifier’s exceptionally low noise floor.
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Audio Research is an American high-end audio brand widely associated with advancing valve-based amplification through modern engineering. Combining traditional tube principles with contemporary circuit design, the brand focuses on scale, transparency, and dynamic realism without sacrificing tonal integrity.
Audio Research components are designed with serviceability and longevity in mind, which is why pre-owned Audio Research equipment continues to hold strong appeal. Well-maintained pre-owned units often remain competitive with current designs, particularly in systems built around musical realism and dynamic expression.
Across Singapore, Malaysia, and Southeast Asia, Audio Research is respected among audiophiles seeking reference-grade valve electronics. On SoundTribeAsia, Audio Research equipment — new and pre-owned — is offered by verified dealers, providing trusted access through a curated regional marketplace.