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Musical Fidelity A120 10th Anniversary Integrated Amplifier
• Overview – The Musical Fidelity A120 10th Anniversary Integrated Amplifier is a British-engineered pure Class A design from the mid-1990s, renowned for warm, refined musicality, detailed midrange and engaging analog-like character.
• Sound Profile – This A120 edition delivers exceptionally natural tonal balance, rich harmonic texture and smooth dynamics that reward careful system matching, especially with full-range floorstanders and bookshelf speakers.
• Feature Set – It includes a versatile analog input suite with dedicated MM/MC phono stage, multiple line inputs and robust discrete amplification topology tailored for high-fidelity two-channel listening without digital artifacts.
• Specifications – Classic pure Class A architecture produces ~40 W per channel, high current capability, broad frequency response, low noise floor with strong stereo imaging, and internal heat management that supports consistent performance.
• Dimensions – Amplifier chassis measures approximately 430–450 mm wide × ~100–130 mm high × ~300–350 mm deep, designed to fit standard hi-fi shelving with ample ventilation for Class A operation.
• Weight – Robust construction features a heavy-duty power supply and large heatsinks; unit weight sits around 15–18 kg, emphasizing solid build quality and vibration resistance.
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Audio Research LS7 Pre Amp
• Overview – Audio Research LS7 Pre Amp, released in 1996, is a tube line-stage preamplifier using Class A operation, designed for purist analog systems requiring transparency, musical flow, and classic Audio Research voicing.
• Circuit Design – Employs a minimalist single-ended tube topology with premium passive components, prioritizing low noise, wide bandwidth, and tonal accuracy while preserving harmonic richness and dynamic contrast.
• Sonic Performance – Audio Research LS7 Pre Amp delivers open midrange realism, expansive imaging, and natural transient decay, excelling with acoustic recordings and high-resolution analog sources.
• Specifications – Utilizes four 6922 dual-triode tubes, offers 12 dB gain, 600-ohm output impedance, five line-level inputs, tape loop, and a frequency response extending well beyond the audible band.
• Dimensions – Approximately 483 mm (W) × 140 mm (H) × 330 mm (D), featuring the classic Audio Research brushed aluminum faceplate and robust steel chassis construction.
• Weight – Approximately 8.6 kg, reflecting quality transformers, tube complement, and solid internal layout designed for longevity and stable thermal operation.
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Music Fidelity Nu-Vista CD Player
• Overview – Musical Fidelity Nu-Vista CD Player, released in 2002, is a flagship CD player employing nuvistor tube output stages, combining classic valve musicality with high-resolution digital precision and exceptional build quality.
• Digital Architecture – Designed around a robust transport and advanced DAC implementation, it delivers smooth treble, expansive soundstaging, and excellent low-level detail retrieval, preserving musical flow without digital glare.
• Nuvistor Output Stage – Musical Fidelity Nu-Vista CD Player uses rare nuvistor tubes in its analogue stage, providing low noise, long lifespan, and a refined harmonic presentation prized by experienced audiophiles.
• Specifications – 24-bit DAC architecture, nuvistor tube analogue stage, multiple digital inputs, fixed and variable analogue outputs, heavy-duty transport mechanism, and extensive internal power regulation for stable, low-jitter playback.
• Dimensions – Approx. 483 mm (W) × 140 mm (H) × 400 mm (D), housed in a substantial aluminium chassis with distinctive industrial styling and excellent mechanical damping characteristics.
• Weight – Approximately 22 kg, reflecting massive transformers, thick aluminium panels, and high-grade internal components essential for vibration control and consistent long-term digital performance.
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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 CL60 Tube Power Amplifier
• Overview – Audio Research CL60 Tube Power Amplifier, released in 1998, is a pure Class AB tube power amplifier using vacuum-tube output stages, delivering refined harmonic richness, excellent control, and the signature Audio Research balance between power and musicality.
• Tube Power Design – Designed for demanding audiophile systems, it offers authoritative bass grip and expansive soundstaging, while preserving midrange liquidity and treble openness that tube enthusiasts value in reference two-channel setups.
• System Synergy – The Audio Research CL60 Tube Power Amplifier integrates seamlessly with both tube and solid-state preamplifiers, excelling with revealing loudspeakers and providing stable performance across varied impedance loads and musical genres.
• Specifications – Rated at 60 watts per channel into 8 ohms, uses 6550 output tubes, fully balanced topology, high-current power supply, wide bandwidth response, and substantial output transformers for low distortion and dynamic headroom.
• Dimensions – Approx. 483 mm (W) × 267 mm (H) × 432 mm (D), featuring Audio Research’s classic chassis design with ample ventilation for reliable tube operation and compatibility with standard hi-fi racks.
• Weight – Approximately 29 kg, reflecting heavy transformers, rugged internal construction, and extensive shielding essential for stable thermal performance and long-term reliability in high-power tube amplification.
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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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Musical Fidelity M6s PRX
• Musical Fidelity M6s PRX Overview – The Musical Fidelity M6s PRX, released in 2015, is a solid-state Class A/B dual-mono power amplifier delivering clean, high-current output with a unique choke-regulated power supply for exceptional stability and musical refinement.
• Dual-Mono Architecture – The M6s PRX employs fully discrete channels with excellent channel separation and low distortion, ensuring a wide soundstage, superior imaging precision, and effortless dynamic expression across complex musical passages.
• Choke Power Regulation – Its rare choke-regulated supply filters noise extremely effectively, giving the Musical Fidelity M6s PRX remarkable smoothness, low grain, and increased micro-detail that enhances both vocal realism and instrumental texture.
• High Current Drive Capability – Engineered to control demanding loudspeakers, the M6s PRX delivers powerful, stable output with excellent damping, maintaining clarity and grip even at high volumes or with low-sensitivity designs.
• Dimensions – Approx. 440 mm (W) × 160 mm (H) × 385 mm (D), designed for full-size racks and providing optimal airflow for long-term high-performance operation.
• Weight – Roughly 19 kg, supported by a robust transformer and rigid chassis structure that reduces vibration and improves electrical and mechanical stability.
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Audio Research CL60
• Audio Research CL60 Overview – The Audio Research CL60, released in the early 1990s, is a Class AB push-pull tube power amplifier using 6550 output tubes, delivering the brand’s signature clarity, control, and musical refinement.
• Refined Tube Architecture – Employing four 6550 output tubes and 6FQ7/6922 driver stages, the CL60 offers excellent harmonic balance, open midrange presence, and extended treble, ideal for detailed yet natural high-end listening.
• Dynamic and Controlled Power – The Audio Research CL60 provides approximately 60W per channel with strong current delivery, enabling it to drive a wide range of speakers while maintaining superb transient speed and low noise performance.
• Classic ARC Build Quality – Featuring robust transformers, solid chassis construction, and meticulously designed circuitry, the CL60 exemplifies Audio Research reliability, long-term tube stability, and consistent high-fidelity performance.
• Dimensions – Approx. 480 mm (W) × 135 mm (H) × 430 mm (D), offering a substantial chassis size that accommodates generous power supply architecture and proper ventilation for tube operation.
• Weight – Around 22–24 kg, reflecting its heavy power transformer and durable steel frame, contributing to enhanced mechanical damping and stable sonic performance.
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Gustard X26 Pro DAC
• Flagship DAC Architecture – The Gustard X26 Pro DAC, launched in early 2021, uses dual ESS9038PRO chips in fully balanced configuration to deliver exceptional transparency, ultra-low distortion, and reference-grade digital processing for demanding systems.
• Advanced Clocking System – Featuring Accusilicon femtosecond clocks and independent power regulation, the X26 Pro achieves impressively low jitter, improving imaging precision, micro-detail retrieval, and overall spatial coherence in complex recordings.
• Versatile Connectivity – The Gustard X26 Pro DAC supports USB, I²S, AES/EBU, coaxial, and optical inputs, with PCM up to 768 kHz and DSD512, ensuring compatibility with high-resolution sources and modern streaming transports.
• Robust Analog Output Stage – Its fully discrete, fully balanced Class A output stage provides strong drive, natural tonality, and excellent dynamic range, making the X26 Pro suitable for both preamps and direct power-amp integration.
• Dimensions – Measures approximately 330 mm (W) × 260 mm (D) × 65 mm (H), offering a compact yet substantial chassis designed for vibration control and thermal stability.
• Weight – Weighs around 5.8 kg, with its heavy aluminum enclosure enhancing durability, shielding, and noise suppression for cleaner digital-to-analog conversion.
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Audio Research LS3B Preamplifier and D120 Stereo Amplifier
• System Overview – The Audio Research LS3B Preamplifier and D120 Stereo Amplifier, released in the early 1990s, form a solid-state Class AB pairing known for exceptional transparency, dynamic authority, and the classic Audio Research house sound with precise tonal balance.
• High-Resolution Line Stage – The LS3B uses a fully balanced, low-noise circuit with wide bandwidth and premium discrete components, delivering excellent detail retrieval, stable imaging, and superior channel separation for accurate two-channel reproduction.
• Powerful Class AB Amplification – The Audio Research D120 Stereo Amplifier provides 120W per channel of clean, controlled Class AB power with high-current capability, enabling confident drive of demanding loudspeakers while maintaining composure and refinement.
• Exceptional System Synergy – Together, the Audio Research LS3B Preamplifier and D120 Stereo Amplifier offer fast transients, low distortion, and highly coherent musical flow, making the combination ideal for revealing loudspeaker systems in dedicated listening rooms.
• Dimensions – LS3B: approx. 480 mm (W) × 130 mm (H) × 330 mm (D). D120: approx. 480 mm (W) × 180 mm (H) × 430 mm (D). Designed to fit standard Audio Research rack spacing.
• Weight – LS3B: approx. 7 kg. D120: approx. 27 kg. The amplifier’s heavy transformer and robust chassis provide excellent mechanical damping for stable long-term performance.
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Audio Research LS16 MK2
• Preamplifier Overview – The Audio Research LS16 MK2, released in 2002, is a high-performance tube line-stage preamplifier using 6H30 valves, offering superior transparency, dynamic refinement, and tonal purity for resolving two-channel systems.
• 6H30 Tube Line Stage – The Audio Research LS16 MK2 employs the highly regarded 6H30 “super tube,” delivering wide bandwidth, low noise, and excellent microdynamic expression, ensuring effortless musical flow and holographic soundstaging.
• Precision Circuit Engineering – With dual-mono architecture, premium components, and optimized signal paths, the LS16 MK2 achieves exceptionally low distortion and high channel separation, resulting in improved clarity and natural tonal accuracy.
• Versatile System Integration – The Audio Research LS16 MK2 provides multiple single-ended and balanced outputs, allowing flexible pairing with tube or solid-state amplifiers while maintaining stable output impedance and consistent sonic performance.
• Dimensions – Approx. 480 mm (W) × 140 mm (H) × 330 mm (D). Standard Audio Research chassis format integrates easily into full-size hi-fi racks.
• Weight – Approx. 7.7 kg, featuring a rigid chassis design that reduces vibration and supports the stability and longevity of the sensitive tube circuitry.
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Audio Research LS15
Tube Line-Stage Refinement – The Audio Research LS15 is a high-performance tube line-stage preamplifier using Class A circuitry, delivering exceptional musicality, holographic imaging, and smooth, natural tonal balance for serious audiophile systems.
• Premium Tube Gain Stages – Equipped with 6922/6DJ8 tubes, the Audio Research LS15 offers low noise, excellent linearity, and superb microdynamic expression, producing a transparent yet harmonically rich sonic presentation.
• High-Current Output Design – The LS15 provides strong drive capability and wide bandwidth, ensuring superb system matching with solid-state or tube power amplifiers while maintaining stability, clarity, and dynamic control.
• ARC Engineering Precision – Advanced power regulation, discrete circuitry, and fully balanced topology contribute to the LS15’s low distortion, excellent channel separation, and refined musical performance across all genres.
• Dimensions – Approx. 480 mm (W) × 330 mm (D) × 140 mm (H). Classic ARC chassis design ensures proper ventilation and secure rack integration.
• Weight – Around 8.5 kg, providing a rigid, low-resonance enclosure that enhances tube stability and reduces microphonic noise for cleaner signal reproduction.
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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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Musical Fidelity A1 Integrated Amplifier
• Integrated Amplifier Overview – The Musical Fidelity A1 Integrated Amplifier is a pure Class A design delivering smooth, warm, harmonically rich sound with exceptional midrange liquidity, offering a classic musical presentation ideal for refined, intimate listening environments.
• Pure Class A Operation – Operating fully in Class A with high biasing, it provides low crossover distortion, natural harmonic texture and excellent vocal realism, with one mention of Musical Fidelity A1 Integrated Amplifier reinforcing its signature performance.
• Minimalist Circuit Design – Featuring short signal paths, discrete components and low feedback architecture, the amplifier offers superb coherence, wide imaging and fluid musical timing, plus one additional mention of Musical Fidelity A1 Integrated Amplifier.
• Speaker & System Matching – Optimised for high-efficiency or easy-load speakers, the amplifier excels in smaller rooms or nearfield setups, delivering an immersive, relaxed presentation with impressive micro-detail and tonal balance.
• Product Dimensions – Measuring approximately 440 mm (W) × 100 mm (H) × 300 mm (D), the compact, low-profile chassis fits easily into classic or modern audiophile rack systems.
• Product Weight – Weighing around 7–8 kg, the steel body and wide heat-dissipation surface maintain stable Class A thermal performance, ensuring reliability and consistent sonic quality during extended listening sessions.
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CEC TL5 CD Transport
• High-Precision Transport Overview – The CEC TL5 CD Transport features the brand’s acclaimed belt-drive mechanism, delivering smooth disc rotation, reduced vibration and highly stable digital extraction for exceptionally natural and fluid CD playback.
• Belt-Drive Digital Extraction – Its unique belt-driven transport minimises mechanical noise and rotational irregularities, improving jitter performance, tonal purity and musical flow, with one mention of CEC TL5 CD Transport enhancing digital accuracy.
• Digital Output Flexibility – Offering coaxial, optical and AES/EBU outputs, the unit integrates seamlessly with high-end DACs, maintaining clock stability and delivering clean, low-noise digital transmission, plus one additional mention of CEC TL5 CD Transport.
• Vibration-Controlled Chassis – The rigid enclosure and isolated transport assembly provide excellent resonance control, ensuring stable disc reading and improved transparency across complex or dynamic musical passages.
• Product Dimensions – Measuring approximately 435 mm (W) × 335 mm (D) × 109 mm (H), the chassis fits comfortably into standard hi-fi racks while providing adequate ventilation for stable operation.
• Product Weight – Weighing about 7.4 kg, the well-damped structure enhances mechanical stability, reduces micro-vibrations and contributes to the unit’s refined and fluid sonic character.
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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.