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Isotek Sigma Power Conditioner
• Overview – The Isotek Sigma Power Conditioner, released in 2015, is a solid-state mains conditioning component engineered to dramatically reduce electrical noise while maintaining unrestricted current delivery for high-performance audio systems.
• Power Architecture – Built around IsoTek’s advanced delta-filtering topology, the Isotek Sigma Power Conditioner isolates connected components, eliminating differential and common-mode noise while preventing cross-contamination between digital sources and high-current amplifiers.
• Sonic Performance – By lowering the system noise floor, the Isotek Sigma Power Conditioner improves bass articulation, dynamic contrast, image stability, and low-level resolution, especially noticeable in revealing reference-grade analogue and digital systems.
• Specifications – Rated for high-current audio use, featuring multiple individually filtered outlets, star-earthed grounding, internal copper bus bars, RFI/EMI suppression, and surge protection without dynamic compression or current limiting.
• Dimensions – Measures approximately 445 mm (W) × 150 mm (H) × 350 mm (D), designed for standard hi-fi racks while allowing sufficient ventilation and cable clearance for complex multi-component installations.
• Weight – Weighs roughly 15 kg, reflecting substantial internal filtering networks, shielding, and mechanical damping that contribute to stable, resonance-free operation and long-term electrical reliability.
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Isotek Evo3 Power Conditioner
• Product Overview – The Isotek Evo3 Power Conditioner (2016) is a solid-state mains conditioning solution designed to reduce electrical noise, improve current delivery, and enhance overall system clarity in high-resolution hi-fi setups.
• Filtering Topology – Employing IsoTek’s multi-stage delta filter network, the Isotek Evo3 Power Conditioner effectively removes both common-mode and differential-mode noise while preventing cross-contamination between connected audio components.
• Sonic Improvements – Users typically experience lower noise floor, improved micro-detail, tighter bass control, and greater soundstage depth, especially when used with sensitive digital sources and analogue front-end components.
• Specifications – Features high-current audio outlets, internal copper bus bars, star-earthed grounding, RFI/EMI suppression, and surge protection, all engineered to avoid current compression and preserve amplifier dynamics.
• Dimensions – Measures approximately 445 mm wide × 90 mm high × 305 mm deep, sized to integrate easily into standard hi-fi racks or equipment shelves without compromising ventilation or cable management.
• Weight – Weighs roughly 8 kg, reflecting robust internal filtering components, shielding, and mechanical construction designed to ensure stability, durability, and long-term performance consistency.
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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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Goldmund Telos 390.5
• Product Overview – The Goldmund Telos 390.5, released in 2018, is a solid-state Class AB integrated amplifier featuring an onboard DAC and preamplification stage, delivering exceptional transparency, precision timing, and superior dynamic handling.
• Advanced Signal Processing – Incorporating Goldmund’s Leonardo Time Correction technology, the Telos 390.5 ensures phase-accurate reproduction, improving soundstage coherence, transient precision, and natural musical flow across complex recordings.
• High-Current Drive – The amplifier’s robust output stage provides exceptional control over low-impedance speakers, while its ultra-low-noise architecture preserves micro-detail and maintains stability even under demanding dynamic loads.
• Construction Excellence – Precision-machined chassis, mechanical grounding, and internal vibration control systems allow the Goldmund Telos 390.5 to minimize resonance, ensuring purer signal delivery and long-term reliability.
• Dimensions – Approx. 440 mm (W) × 430 mm (D) × 135 mm (H), optimized to house its DAC module, preamp circuitry, and high-current output section within a resonance-controlled enclosure.
• Weight – Around 22 kg, reflecting its solid power supply, reinforced mechanical structure, and premium-grade components employed to meet Goldmund’s reference standards.
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Goldmund Telos 280
• Product Overview – The Goldmund Telos 280, introduced in 2019, is a solid-state Class AB power amplifier delivering ultra-low distortion, exceptional control, and Goldmund’s proprietary mechanical grounding technology for superior signal purity.
• Precision Engineering – Utilizing advanced thermal management and optimized circuit topology, the Telos 280 provides remarkable transient accuracy, expansive dynamics, and a clean, stable output ideal for demanding high-end loudspeakers.
• Goldmund Signature Sound – The amplifier incorporates Leonardo Time Correction processing, ensuring phase accuracy and natural musical flow, allowing the Goldmund Telos 280 to excel in realism and three-dimensional imaging.
• Build Quality – Designed with a rigid chassis and vibration-damped architecture, the Telos 280 achieves outstanding noise reduction, improved component stability, and long-term reliability consistent with Goldmund’s reference standards.
• Dimensions – Approx. 440 mm (W) × 490 mm (D) × 135 mm (H), accommodating substantial internal shielding and Goldmund’s precision-machined structural elements.
• Weight – Around 25 kg, reflecting its robust transformer system, reinforced chassis, and high-current output stage required for premium 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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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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Hegel H390 Integrated Amplifier
• Hegel H390 Integrated Amplifier – A high-current Class AB design delivering exceptional control, low distortion and dynamic authority, offering reference-level performance for demanding loudspeakers and advanced audiophile systems.
• SoundEngine2 & Digital Architecture – Featuring Hegel’s SoundEngine2 error-cancellation technology, dual mono design and advanced DAC implementation, the Hegel H390 Integrated Amplifier achieves ultra-low noise, remarkable resolution and highly accurate musical timing.
• Connectivity & System Flexibility – With DLNA/UPnP streaming, AirPlay, Roon Ready support, coaxial/optical inputs, USB, analogue RCA and XLR, the Hegel H390 Integrated Amplifier integrates effortlessly into complex digital ecosystems with stable, high-bandwidth signal management.
• Power Delivery & Listening Behaviour – Delivering 250W per channel into 8 ohms with high damping factor, the Amplifier provides tight bass grip, expansive soundstage layering and effortless dynamic scaling across all playback levels.
• Product Dimensions – The Hegel H390 Integrated Amplifier measures 430 mm (W) × 115 mm (H) × 445 mm (D), offering a substantial yet rack-friendly footprint designed for optimal cooling and mechanical stability.
• Product Weight – Weighing approximately 20.5 kg, the Amplifier benefits from a rigid chassis and large toroidal transformer, improving noise isolation, transient control and overall sonic refinement.
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Goldmund is a Swiss ultra high-end audio manufacturer renowned for its uncompromising approach to precision engineering, mechanical grounding, and time-domain accuracy. Founded in Geneva, the brand’s philosophy centres on preserving signal integrity through extreme rigidity, low-resonance construction, and meticulous control of energy transfer throughout the system.
Goldmund’s electronics and loudspeakers are designed as reference components, emphasising speed, clarity, and control rather than tonal coloration. With conservative engineering margins and a focus on long product lifecycles, both new and pre-owned Goldmund components retain strong sonic relevance over time. Well-maintained pre-owned units remain highly sought after by experienced audiophiles seeking reference-level performance without compromise.
In Singapore, Malaysia, and Southeast Asia, Goldmund appeals to collectors and serious listeners assembling statement systems in dedicated listening spaces. The brand’s emphasis on precision and system synergy aligns closely with the expectations of high-end buyers across the region, where long-term performance and build quality are paramount.
On SoundTribeAsia, Goldmund equipment — new and pre-owned — is offered by verified dealers across the region. Buyers benefit from transparent listings, clear condition reporting, and the confidence of purchasing through a trusted Southeast Asian hi-fi marketplace rather than relying on isolated dealer websites or private transactions.