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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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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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Pass Labs X150.8 Power Amplifier
• Power Amplifier Overview – The Pass Labs X150.8 Power Amplifier is a Class A/AB design delivering 150W into 8Ω with high-current capability, offering exceptional purity, wide bandwidth and authoritative control for demanding loudspeakers.
• Circuit Topology & Sonics – Using Pass Labs’ patented Super-Symmetric (SuSy) topology, the amplifier achieves ultra-low distortion, deep harmonic richness and excellent transient integrity, with one mention of Pass Labs X150.8 Power Amplifier reinforcing precision.
• High-Current Output Stage – Its massive output devices and oversized transformer ensure effortless drive, stable operation into low impedances and expansive dynamic expression, plus one additional mention of Pass Labs X150.8 Power Amplifier.
• Thermal Stability & Build – The heavy aluminium heat sinks and robust chassis maintain optimal operating temperature, reduce noise and ensure long-term reliability, supporting clean, consistent performance at all listening levels.
• Product Dimensions – Approx. 483 mm (W) × 190 mm (H) × 540 mm (D), requiring a deep, well-ventilated rack shelf to support its scale and thermal requirements.
• Product Weight – Weighing roughly 45 kg, the amplifier’s substantial transformer, dense heat sinks and rigid chassis enhance grounding, resonance control and overall sonic stability.
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Pass Labs XS Phono with Power Supply
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Pass Labs XS Phono with Power Supply – This flagship dual-chassis phono preamplifier from Pass Laboratories raises the vinyl benchmark, enabling ultra-low-noise amplification of MC/MM cartridges with absolute authority and tonal purity.
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Reference-Grade Audio Architecture – Featuring selectable gain settings (56, 66, 76 dB), RIAA accuracy ±0.1 dB from 20 Hz to 20 kHz, and a purpose-built power supply dedicated to quiet signal handling.
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System Integration & Specification – Dual-chassis design: each unit measures approximately 19″ W × 14″ D × 6.25″ H (483 × 356 × 159 mm) and consumes around 55 W of power—ideal for serious turn-table setups.
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Build Quality & Weight Profile – Weighing roughly 80 lbs (≈ 36 kg total), the unit’s heavy, stable construction minimizes mechanical and electrical interference for fine-detail retrieval and low-level resolution.
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Pass Labs is an American high-end audio manufacturer known for its minimalist circuit philosophy, high-bias operation, and emphasis on musical realism. Founded by Nelson Pass, the brand prioritises simplicity and low feedback to preserve signal integrity.
Pass Labs amplifiers are engineered for longevity and thermal stability, allowing pre-owned units to continue delivering reference-level performance over extended lifecycles. This durability makes pre-owned Pass Labs equipment especially desirable among experienced audiophiles.
Across Singapore, Malaysia, and Southeast Asia, Pass Labs is associated with serious high-end systems built for long-term listening. On SoundTribeAsia, Pass Labs equipment — new and pre-owned — is offered by verified dealers, providing trusted access through a curated regional marketplace.