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Krell KAV-300I Integrated Amplifier
• Product Overview – The Krell KAV-300I Integrated Amplifier was released in 1999 as a solid-state Class A/AB design, combining preamplifier and high-current power amplification for authoritative control and classic Krell drive.
• Amplification Performance – Delivering exceptional grip and dynamics, the amplifier provides effortless current delivery, wide bandwidth, and low noise, making it ideal for demanding loudspeakers and high-resolution analogue or digital sources.
• Build & Sonic Character – The Krell KAV-300I Integrated Amplifier features Krell’s robust power supply architecture, discrete circuitry, and minimalist signal path, resulting in tight bass, transparent midrange, and extended, controlled high frequencies.
• Specifications – Rated at approximately 150 W per channel into 8 ohms and 300 W into 4 ohms, with high-current output stages, wide frequency response, and stable operation into low-impedance speaker loads.
• Dimensions – Measures approximately 432 mm (W) × 178 mm (H) × 457 mm (D), requiring a sturdy, well-ventilated rack to accommodate its substantial chassis depth and heat dissipation.
• Weight – Weighs roughly 31 kg, reflecting its oversized transformer, large capacitor bank, and heavy aluminum chassis designed for mechanical stability and long-term electrical performance.
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Krell KSA200S Amplifier
• Product Overview – The Krell KSA200S Amplifier, released in 1995, is a solid-state pure Class A stereo power amplifier delivering legendary current capability, extreme control, and the authoritative sonic signature Krell is known for.
• Amplification Topology – Designed with massive power supplies and fully balanced circuitry, the KSA200S operates in continuous Class A, providing unwavering drive, low distortion, and exceptional loudspeaker control even under demanding loads.
• Sonic Performance – Krell KSA200S Amplifier delivers explosive dynamics, deep controlled bass, and a neutral tonal balance, excelling with difficult speakers and large-scale orchestral or rock recordings at realistic listening levels.
• Specifications – Rated at 200 watts per channel into 8 ohms, doubling into 4 ohms, with stable operation into 2 ohms, ultra-high current output, and extremely low output impedance for maximum damping factor.
• Dimensions – Chassis measures approximately 438 mm (W) × 197 mm (H) × 546 mm (D), reflecting the substantial heatsinking and transformer size required for sustained Class A operation.
• Weight – Weighs approximately 72 kg, with the extreme mass attributed to oversized transformers, extensive heatsinks, and heavy internal construction designed for thermal stability and long-term reliability.
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Jadis I-50 Tube Integrated Amplifier
• Product Overview – Jadis I-50 Tube Integrated Amplifier released in 2018, is a pure Class A, vacuum-tube integrated amplifier featuring line-level and optional phono capability, delivering classic French tube musicality with modern reliability.
• Circuit & Build Quality – Handcrafted in France, the amplifier employs point-to-point wiring, oversized transformers, and premium passive components, ensuring low noise, long-term stability, and the unmistakable Jadis tonal richness.
• Sound Performance –Jadis I-50 Tube Integrated Amplifier is known for its lush midrange, fluid dynamics, and expansive soundstage, the Jadis I-50 Tube Integrated Amplifier excels with vocals and acoustic music while maintaining control and drive with efficient loudspeakers.
• Specifications – Delivers approximately 50 W per channel in pure Class A using KT150 output tubes, with 4 and 8 ohm taps, wide bandwidth response, and robust power supply for consistent tube operation.
• Dimensions – Approximate chassis dimensions are 485 mm (W) × 245 mm (H) × 380 mm (D), housed in a polished stainless-steel frame that combines mechanical rigidity with distinctive visual presence.
• Weight – Weighs approximately 35 kg, reflecting massive transformers, heavy-gauge chassis construction, and substantial tube complement essential for Class A thermal and electrical stability.
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Krell FPB MC250 Monoblock
• Overview – Krell FPB MC250 Monoblock, released in 2001, is a solid-state Class A/AB monaural power amplifier designed to deliver immense current capability, extreme control, and reference-level dynamics for demanding loudspeakers.
• Amplifier Topology – Built on Krell’s Full Power Balanced architecture, it operates in high-bias Class A before transitioning to Class AB, ensuring low distortion, fast transient response, and consistent performance across complex loads.
• System Authority – The Krell FPB MC250 Monoblock excels at driving low-impedance and difficult speakers, producing authoritative bass grip, wide dynamic headroom, and effortless scale without compression at realistic listening levels.
• Specifications – Rated at 250 watts into 8 ohms, doubling to 500 watts into 4 ohms and higher into lower impedances, featuring extremely high damping factor, wide bandwidth, and fully balanced discrete circuitry.
• Dimensions – Approx. 438 mm (W) × 305 mm (H) × 533 mm (D), housed in a massive aluminium chassis with extensive heatsinking and internal isolation for thermal stability and vibration control.
• Weight – Approximately 68 kg per monoblock, reflecting enormous transformers, capacitor banks, and Krell’s uncompromising mechanical construction required for sustained high-current operation.
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Krell KSL Pre Amp, FPB 200 Power Amp & KAV 300 CD Player
• Krell KSL Pre Amp, FPB 200 Power Amp & KAV 300 CD Player Overview – This early-2000s Krell trio delivers reference solid-state Class A/AB performance, combining authoritative power, ultra-low distortion, and exceptional transparency for serious high-end stereo systems.
• High-Resolution Preamplifier Clarity – The KSL preamp provides wide bandwidth, fully balanced circuitry, and a low-noise signal path, offering precise imaging, excellent channel separation, and a clean, neutral tonal balance suited for revealing systems.
• FPB 200 Class A/AB Power Authority – The Krell KSL Pre Amp, FPB 200 Power Amp & KAV 300 CD Player system is anchored by the FPB 200, delivering 200W per channel with Krell’s Sustained Plateau Bias for massive current and effortless control.
• Premium Digital Playback – The KAV 300 CD Player employs Krell’s advanced jitter-reduction, high-precision DAC architecture, and robust transport mechanism to produce detailed, dynamic, and musically engaging CD reproduction.
• Dimensions – KSL: approx. 432 × 76 × 381 mm. FPB 200: approx. 483 × 254 × 610 mm. KAV 300 CD: approx. 483 × 89 × 410 mm, all designed for rack-friendly installation.
• Weight – FPB 200 approx. 45–50 kg due to its massive transformers; KSL approx. 8 kg; KAV 300 CD approx. 10 kg, reflecting Krell’s heavy-duty, resonance-free construction.
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Jadis JA80 Tube Monoblocks
• Overview – The Jadis JA80 Tube Monoblocks, first released in 1985, are Class A tube power amplifiers using KT88 or KT90 valves, delivering renowned French craftsmanship, tonal richness, and dynamic authority for high-end loudspeakers.
• Tube Architecture – Each JA80 monoblock features hand-wired point-to-point construction, oversized transformers, and premium tubes, producing a fluid, harmonically saturated presentation with exceptional micro-detail and musical expressiveness.
• Power & Drive – Delivering approximately 60W of pure Class A power per chassis, the Jadis JA80 provides strong current delivery and excellent speaker control, making it suitable for complex or low-efficiency speakers.
• Build & Craftsmanship – The amplifiers showcase polished brass faceplates, heavy steel chassis, and meticulously selected components, ensuring durability, low mechanical resonance, and the signature Jadis aesthetic and sonic refinement.
• Dimensions – Each monoblock measures approx. 480 mm (W) × 230 mm (H) × 360 mm (D), accommodating large transformers and robust internal tube circuitry.
• Weight – Each unit weighs around 35–40 kg, reflecting the massive power supply architecture and premium transformer design essential for stable Class A tube performance.
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Krell KSA-300S Stereo Amplifier
• Krell KSA-300S Stereo Amplifier – This powerhouse Class A/AB sliding-bias design delivers massive current, exceptional control, and the unmistakable Krell authority, driving even the most demanding speakers with effortless precision.
• Sustained Power Delivery – Known for its enormous current reserves and stability into extremely low impedances, the KSA-300S provides grip, dynamics, and low-frequency impact unmatched by typical solid-state amplifiers of its era.
• Sophisticated Krell Topology – Featuring Krell’s proprietary Sustained Plateau Biasing, the amplifier achieves Class A performance at practical efficiency levels, offering transparency, speed, and refined musical detail.
• System Integration – Balanced and single-ended inputs, robust binding posts, and a highly inert chassis ensure quiet operation, excellent grounding, and seamless matching with high-end preamps and loudspeakers.
• Dimensions – Krell KSA-300S Stereo Amplifier Measures approximately 483 mm (W) × 241 mm (H) × 686 mm (D), requiring a sturdy rack with ample ventilation due to its substantial heat dissipation needs.
• Weight – Weighs roughly 68–70 kg, attributed to its heavy transformer architecture and oversized power supply, ensuring rock-solid stability and peak performance under demanding loads.
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Jadis JPL Tube Preamp
Specifications
• Type: Vacuum Tube Line Preamplifier
• Class: Pure Class-A, point-to-point hand-wired
• Tubes: 2 × ECC82 (12AU7), 2 × ECC83 (12AX7)
• Inputs: 5 line inputs (RCA)
• Outputs: 2 main outputs (RCA)
• Frequency Response: 20Hz – 50kHz
• Output Impedance: 1 kΩ
• Dimensions: 430 × 110 × 270 mm
• Weight: 10.5 kg
• Made in France
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Critical Mass Systems Amplifier Stand
• Critical Mass Systems Amplifier Stand – A precision-engineered isolation platform designed to extract maximum performance from high-end amplifiers by managing micro-vibrations and energy transfer through its multi-stage damping architecture.
• Resonance Control and Energy Dissipation – The Critical Mass Systems Amplifier Stand employs a dual-zone vibration filtration system and proprietary polymer damping layers to reduce mechanical noise, improving clarity, timing, and dynamic precision.
• Reference-Grade Build Quality – Handcrafted in the USA, each stand features aerospace-grade aluminum, carbon-composite materials, and precision titanium hardware to ensure durability, acoustic neutrality, and long-term performance stability.
• Customizable for System Integration – The stand’s modular design allows for tailored dimensions, finish options, and load capacity—ideal for housing Class A or high-current amplifiers exceeding 90 kg.
• Product Dimensions – Standard dimensions are approximately 711 mm (W) × 610 mm (D) × 130 mm (H), optimized for full-size high-end amplifiers while maintaining structural precision and balance.
• Weight – Approximately 40 kg per platform; the substantial mass and layered construction contribute to superior vibration control and consistent performance under heavy component loads.
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Critical Mass Systems is an American specialist focused on equipment isolation, resonance control, and mechanical energy management for high-performance audio systems. The brand’s philosophy treats vibration as a measurable and controllable variable, applying scientific principles to reduce unwanted mechanical interference that can compromise audio performance.
Critical Mass Systems products include isolation platforms, equipment racks, and component-specific support solutions designed to manage both structure-borne and airborne vibrations. Because isolation technology is based on physical principles rather than changing electronics, pre-owned Critical Mass Systems products remain highly effective when properly maintained. Many audiophiles use these solutions across multiple system upgrades, reinforcing their long-term value.
Across Singapore, Malaysia, and Southeast Asia, Critical Mass Systems is valued by experienced listeners refining high-resolution systems where subtle gains in clarity, focus, and dynamic stability matter. On SoundTribeAsia, Critical Mass Systems products — new and pre-owned — are offered by verified dealers, providing trusted access, clear condition details, and confidence through a reputable regional marketplace.