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Soulnote M3 Mono Amplifier
• Overview – The Soulnote M3 Mono Amplifier, released in 2019, is a solid state pure Class A monoblock design engineered with zero global feedback topology to deliver ultra-fast transient response and uncompromised musical transparency.
• Circuit Architecture – Built around Soulnote’s non-parallel push-pull output stage and discrete driver design, the amplifier emphasizes instantaneous current delivery, wide bandwidth, and exceptionally low phase distortion.
• Sonic Character – The Soulnote M3 Mono Amplifier is celebrated for explosive dynamics, deep tonal saturation, and expansive soundstage layering, making it ideal for high-resolution loudspeakers requiring precision and authority.
• Specifications – Pure Class A solid state topology, approximately 200W into 8Ω and 400W into 4Ω, wide frequency response beyond 20Hz–100kHz, extremely low distortion, and high current capability for difficult loads.
• Dimensions – Each chassis measures approximately 454 mm wide × 189 mm high × 430 mm deep, requiring generous ventilation to support continuous Class A thermal operation.
• Weight – Each monoblock weighs roughly 32 kg, reflecting oversized transformers, heavy aluminum construction, and substantial heat sinking for stable, long-term performance.
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SoulNote A-2 Ver. 2 Integrated Amplifier
Soulnote A-2 v2
Soulnote A-2 v2 is a fully balanced, non NFB integrated amplifier designed to preserve timing, texture, and dynamic swing while offering flexible operating modes for real systems.
Design and engineering
The A-2 v2 carries Soulnote’s discrete, wide bandwidth gain architecture with a short signal path and mechanical tuning derived from the Series 3 program. Revisions to device selection, biasing, and grounding reduce stored energy and lower audible residue, yielding cleaner transients and a more stable image.
What changed from A-2 (previous version)
The v2 platform strengthens current delivery and simplifies the voltage gain loop for higher purity. The driver stage also uses the same TO3P transistor as the output stage. By passing a large current through the driver, it instantly compensates for HFE fluctuations caused by current changes in the output stage. This is the biggest difference and breakthrough from the prior version. The power amp mode now hard bypasses selector and volume control for those who prefer a separate preamp. Chassis and top cover treatment improve resonance control compared to the earlier A-2.
Connectivity and control
Balanced and single ended inputs are relay switched, with a balanced attenuator for consistent channel tracking. Four modes cover integrated stereo, bi amp mono, power amp stereo, and power amp bi amp. Control logic is isolated so audio circuits remain quiet during operation.
What distinguishes it
Fast, high current drive with a lively, uncompressed presentation and the flexibility to act as a true power amp when required.
Who it is for
Listeners who value natural timing, wide bandwidth clarity, and the option to reconfigure the amplifier as their system evolves.
In the box
Main unit, metal remote control, AC power cable, spike feet, documentation.
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SoulNote RSC Speaker Cables (3m)
• Product Overview – SoulNote RSC Speaker Cables (3m), released in the late-2010s, reflect SoulNote’s purist design philosophy, focusing on ultra-low loss signal transfer, mechanical resonance control, and natural musical expression.
• Cable Design Philosophy – Built using high-purity copper conductors and SoulNote’s resonance-controlled construction, these cables minimise stored energy and phase distortion, preserving timing accuracy, dynamics, and tonal neutrality across wideband loudspeakers.
• Sonic Performance – The SoulNote RSC Speaker Cables (3m) deliver fast transient response, clean bass articulation, and an open midrange, making them ideal for revealing high-resolution systems that prioritise realism and rhythmic coherence.
• Specifications – Low-resistance conductor geometry, carefully managed inductance and capacitance, non-magnetic materials throughout, and mechanically damped structure to reduce vibration-induced coloration and maintain consistent electrical characteristics.
• Dimensions – Each cable is supplied in a 3-metre length, offering practical reach for most floorstanding speaker placements while maintaining consistent impedance and signal integrity throughout the full run.
• Weight – Moderate overall mass reflecting solid conductor density and damping materials, designed to provide stability without placing excessive mechanical stress on amplifier or loudspeaker binding posts.
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SOULNOTE D-3 DAC
• Overview – SOULNOTE D-3 DAC, released in 2020, is a reference-class digital-to-analog converter designed with SoulNote’s zero-feedback architecture to deliver highly accurate, ultra-low distortion conversion and musical transparency.
• Digital Architecture – Utilising discrete analogue filter stages and precision clocking, the D-3 DAC preserves timing integrity and dynamic expression, providing outstanding resolution and spatial coherence from PCM and DSD sources.
• Sound Quality – The SOULNOTE D-3 DAC is prized for its natural midrange clarity, refined treble extension, and low noise floor, allowing connected preamplifiers and amplifiers to reveal deeper musical nuance across genres.
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SOULNOTE A-3 Reference Integrated Amplifier
• Overview – SOULNOTE A-3 Reference Integrated Amplifier, released in 2021, is a solid-state Class AB integrated design without DAC or phono, engineered for ultimate signal purity and unrestricted current delivery.
• Circuit Philosophy – Built around SoulNote’s zero-feedback, non-parallel architecture, the amplifier prioritises instantaneous current response, wide bandwidth, and natural harmonic flow, appealing strongly to purist audiophiles.
• Sonic Character – SOULNOTE A-3 Reference Integrated Amplifier delivers exceptional dynamic contrast, dense tonal colour, and expansive soundstage depth, excelling with difficult loudspeaker loads and revealing high-resolution source components.
• Specifications – Rated at approximately 120 W per channel into 8 ohms and 240 W into 4 ohms, with ultra-high current capability, wide frequency response, and discrete output devices optimised for low impedance control.
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SoulNote A-1 Ver. 2 Integrated Amplifier
• Product Overview – SoulNote A-1 Ver. 2 Integrated Amplifier, released in 2022, is a solid-state Class AB integrated amplifier using Soulnote’s zero-feedback philosophy, delivering exceptional speed, transparency, and natural musical flow.
• Circuit Architecture – Designed with fully discrete, non-NFB circuitry and simplified signal paths, the amplifier prioritises phase accuracy, micro-dynamic resolution, and tonal purity, appealing to listeners seeking uncoloured, high-resolution playback.
• Sound Performance – The SoulNote A-1 Ver. 2 Integrated Amplifier offers agile bass control, vivid midrange articulation, and extended treble clarity, pairing effortlessly with revealing loudspeakers and high-quality digital or analog sources.
• Specifications – Output power is approximately 80 W per channel into 8 ohms and 160 W into 4 ohms, featuring wide bandwidth, high current delivery, and a robust linear power supply.
• Dimensions – Approximate chassis dimensions are 454 mm (W) × 179 mm (H) × 407 mm (D), housed in a resonance-controlled aluminium enclosure optimised for electrical stability and thermal management.
• Weight – The unit weighs approximately 24 kg, reflecting its substantial transformer, high-capacity power supply components, and rigid mechanical construction designed to minimise vibration and noise.
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Quad 303 Power Amplifier and Quad 33 Preamplifier
Iconic Stereo Amplifier System – The Quad 303 and Quad 33 form a legendary solid-state power amplifier and control unit pairing. The Quad 303 is a classic, reliable power amplifier designed to deliver the famous Quad sound with authority and precision.
The Renowned “Quad Sound” – Experience the unique, fatigue-free musicality that made this system famous. Characterized by its exceptional clarity, natural tonal balance, and effortless delivery, it provides a listening experience that is both engaging and timeless.
Fully Serviced and Authentic – This matched pair has been professionally serviced to original factory specifications, ensuring optimal performance and reliability. You receive the authentic, iconic experience as intended by Quad’s pioneering engineers.
Versatile Control Unit – The Quad 33 preamplifier features comprehensive inputs, including a high-quality moving magnet phono stage for your turntable. Its flexible filtering and tone controls allow you to tailor the sound perfectly to your room and taste.
Classic Compact Dimensions – The Quad 303 power amplifier measures a compact 267mm wide, 133mm high, and 206mm deep. The matching Quad 33 control unit shares a similar elegant, minimalist footprint designed for a refined hi-fi rack setup.
Substantial Build Quality – The robustly built Quad 303 amplifier weighs 8.2 kg (18.1 lbs), reflecting its high-quality internal components and chassis. The Quad 33 control unit adds a further 3.4 kg (7.5 lbs), denoting its solid construction.
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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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Quad Elite Pre & QSP Power Amplifier
• Pre & Power Synergy – The Quad Elite Pre & QSP Power Amplifier system, released in 2011, delivers refined Class AB solid-state amplification with Quad’s hallmark neutrality, smoothness, and precise musical articulation across all genres.
• Elite Pre Transparency – The Elite Pre offers exceptionally low noise, wide bandwidth, and high input flexibility, ensuring clean signal handling and seamless integration with both analog and digital source components in modern hi-fi setups.
• QSP Current Dumping Power – The QSP features Quad’s updated Current Dumping topology, providing stable high current, excellent load tolerance, and natural, low-distortion dynamics, making it ideal for both bookshelf and floorstanding speakers.
• Musical Refinement – Together, the Quad Elite Pre & QSP Power Amplifier deliver holographic imaging, smooth midrange texture, and fast, controlled bass, offering a compelling upgrade path for audiophiles seeking classic Quad musicality.
• Dimensions – Elite Pre: approx. 321 × 70 × 310 mm. QSP: approx. 321 × 140 × 310 mm. Compact, rack-friendly sizing ensures simple placement in modern audio systems.
• Weight – Elite Pre around 5 kg; QSP approx. 11 kg. The solid chassis and robust transformer design enhance mechanical damping and improve long-term performance stability.
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YBA Integre Alpha Integrated Amplifier
• YBA Integre Alpha Integrated Amplifier Overview – The YBA Integre Alpha Integrated Amplifier, launched in the mid-1990s, is a Class AB solid-state design featuring high-quality analog inputs and YBA’s signature minimal-feedback topology for purity and musical realism.
• Refined French Engineering – The YBA Integre Alpha delivers exceptional tonal accuracy, wide soundstage depth, and a smooth, grain-free presentation, making it ideal for resolving speakers that benefit from organic musical flow and control.
• Musical Drive and Dynamics – With its robust power supply and precisely voiced circuitry, the YBA Integre Alpha offers fast transient response, excellent micro-detail retrieval, and stable current delivery for rhythmic, engaging playback.
• Low-Noise Analog Performance – The YBA Integre Alpha emphasizes ultra-low distortion and clean power delivery, ensuring black backgrounds, natural harmonic structure, and impressive dynamic contrast across both digital and analog sources.
• Dimensions – Approx. 430 mm (W) × 85 mm (H) × 300 mm (D), fitting easily into standard hi-fi racks while maintaining optimal ventilation for stable long-term performance.
• Weight – Roughly 10–12 kg, featuring a high-grade transformer and rigid chassis that help suppress vibration and enhance signal purity.
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Quad 22L
• Quad 22L – A refined floorstanding loudspeaker known for its smooth tonal balance, articulate midrange, and engaging musicality, designed to deliver a natural, non-fatiguing presentation across diverse listening rooms.
• Dual-Driver Precision – Utilises a dedicated soft-dome tweeter and twin Kevlar mid/bass drivers, providing excellent clarity, controlled dispersion, and enhanced coherence for both vocal accuracy and full-range musical reproduction.
• Room-Friendly Design – Rear-ported enclosure enables flexible placement while maintaining solid low-frequency extension and rhythmic control, making it suitable for medium to large listening environments.
• Timeless Build Quality – High-quality cabinet construction with beautifully lacquered finishes offers reduced resonance, strong structural rigidity, and an elegant aesthetic aligned with Quad’s British engineering philosophy.
• Dimensions – Stands approximately 872 mm (H) × 203 mm (W) × 280 mm (D), optimised for stable floor placement and proper driver height relative to seated listening position.
• Weight – Each speaker weighs around 18 kg, providing the necessary mass for reduced cabinet vibrations and improved acoustic performance.
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Quad Elite Pre and QSP Amplifier
• Quad Elite Pre and QSP Amplifier – This solid-state Class AB pre–power combination delivers Quad’s signature natural clarity, refined musicality, and stable current delivery, offering an exceptional upgrade path for serious two-channel listeners.
• Precision Preamp Architecture – The Quad Elite Pre features low-noise gain stages, high-quality input switching, and tone-defeat options, ensuring clean signal handling and excellent transparency while maintaining Quad’s smooth, balanced sonic signature.
• High-Current Power Delivery – The QSP power amplifier provides 140W into 8Ω with Quad’s patented “Current Dumping” technology, offering exceptional grip, low distortion, and robust dynamics across demanding loudspeaker loads.
• System Synergy & Control – Together, the Quad Elite Pre and QSP Amplifier create a cohesive, full-bodied presentation with deep imaging, stable soundstaging, and reliable operation, ideal for music lovers seeking performance and long-term stability.
• Dimensions – Elite Pre: approx. 321 mm (W) × 310 mm (D) × 70 mm (H).
QSP: approx. 321 mm (W) × 310 mm (D) × 140 mm. Compact footprint for easy rack placement.
• Weight – Elite Pre approx. 4.5 kg; QSP approx. 12 kg. Solid chassis design minimizes vibration, enhancing component longevity and maintaining consistent audio performance.
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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.