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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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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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Acoustical Systems AXIOM 12″ Reference Tonearm
• Product Overview – The Acoustical Systems AXIOM 12” Reference Tonearm, launched in 2014, features a fully adjustable geometry design, ultra-rigid construction, and reference-grade engineering to optimize cartridge alignment and tracking precision.
• Advanced Geometry – Incorporating UNIDIN alignment architecture, the AXIOM achieves reduced tracing error and distortion across the record surface, giving more linear, dynamic, and tonally accurate analogue reproduction.
• Mechanical Excellence – Its hybrid bearing system combines ceramic, ruby, and precision metal components, delivering exceptionally low friction, ultra-stable movement, and enhanced micro-detail retrieval from both MC and MM cartridges.
• Resonance Optimization – The Acoustical Systems AXIOM 12″ Reference Tonearm multi-material construction and internal damping network minimize structural resonance, improving spatial realism, transient accuracy, and low-level resolution in high-end turntable setups.
• Dimensions – Effective length approximately 305 mm (12”), adjustable mounting distance around 291 mm, engineered for compatibility with premium high-mass and reference-grade turntable platforms.
• Weight – Approx. 650–750 g depending on configuration, providing optimal counterbalance capability and mechanical grounding for precision tracking performance.
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Melco N100-H20 (2TB) Library and Elite Plixir LPS
• Melco N100-H20 (2TB) Library and Elite Plixir LPS Overview – The Melco N100-H20, introduced in 2018, is a high-performance digital music library whose performance is significantly elevated with the Elite Plixir LPS linear power supply for ultra-low-noise operation.
• Bit-Perfect Music Storage – Designed as a dedicated audiophile server, the Melco N100-H20 provides isolated data paths, optimized Ethernet architecture, and a 2TB HDD for quiet, reliable, bit-perfect music delivery to high-end DACs.
• Improved Power Delivery with Plixir – The Elite Plixir LPS supplies exceptionally clean DC power, reducing noise, enhancing micro-detail, and improving timing accuracy—unlocking far greater transparency and refinement from the Melco platform.
• Seamless Integration & Control – Compatible with UPnP playback, Roon (via bridge), and Melco’s app ecosystem, ensuring stable streaming, low jitter, and superior data handling with both USB and network-based playback systems.
• Dimensions – Melco N100: approx. 215 mm (W) × 61 mm (H) × 269 mm (D). Plixir LPS: approx. 220 mm (W) × 80 mm (H) × 260 mm (D), both compact for versatile rack placement.
• Weight – Melco N100 approx. 3.5 kg; Plixir LPS approx. 5–6 kg. The heavier toroidal design of the Plixir LPS enhances stability and isolation from electrical noise.
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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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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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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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Acoustical Systems is a German analog audio manufacturer specialising in precision tonearms, cartridges, and vinyl playback accessories. The brand’s philosophy is grounded in mechanical accuracy, material science, and fine tolerances, treating analog playback as an engineering discipline rather than nostalgia.
Acoustical Systems products are designed for extreme durability and long-term relevance, often using exotic materials and precision machining. Because these components are based on mechanical fundamentals, pre-owned Acoustical Systems equipment remains highly desirable and continues to perform at reference levels when properly maintained.
Across Singapore, Malaysia, and Southeast Asia, Acoustical Systems is respected among serious vinyl enthusiasts building no-compromise analog front ends. On SoundTribeAsia, Acoustical Systems products — new and pre-owned — are offered by verified dealers, providing transparent listings and trusted access through a curated regional marketplace.