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Classe CP50 Preamp and CA150 Power Amplifier
• Reference Heritage – Classe CP50 Preamp and CA150 Power Amplifier, released in the late 1990s, combine solid state Class A/AB design with refined Canadian engineering, delivering authoritative control, tonal neutrality, and long-term musical satisfaction.
• Preamplifier Performance – The CP50 preamplifier is renowned for its low-noise architecture, discrete circuitry, and transparent gain stages, offering excellent channel separation and a natural, unforced presentation across analog sources.
• Power Amplifier Authority – The CA150 stereo power amplifier provides high-current solid state Class AB operation, maintaining composure into difficult speaker loads while preserving midrange clarity, dynamic headroom, and tight, controlled bass response.
• Specifications – Power output is rated at approximately 150 watts per channel into 8 ohms, doubling into 4 ohms, with wide bandwidth, high damping factor, and stable operation into demanding loudspeakers.
• Dimensions – Classe CP50 Preamp and CA150 Power Amplifier. CP50 measures approximately 483 mm (W) × 76 mm (H) × 330 mm (D), while CA150 measures roughly 483 mm (W) × 178 mm (H) × 406 mm (D), suitable for standard hi-fi racks.
• Weight – CP50 weighs about 8 kg, while the CA150 weighs approximately 29 kg, reflecting substantial power supply design, heavy transformers, and rigid chassis construction for vibration control and thermal stability.
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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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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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Naim Audio NAP300 and NAC252 Supercap
• Naim Audio NAP300 and NAC252 Supercap Overview – Released in the early 2000s, this solid-state Class AB amplifier and reference preamplifier system uses dual-chassis power supplies to deliver exceptional musicality, clarity, and current-drive authority.
• Reference Preamplifier Precision – The NAC252, powered by the Supercap, employs discrete Class A gain stages and regulated supply rails, providing ultra-low noise performance, superb timing accuracy, and precise microdynamic expression across all sources.
• Dual-Chassis Power & Control – The Naim Audio NAP300 and NAC252 Supercap pairing offers 90W per channel with high-current delivery, ensuring exceptional loudspeaker grip, wide dynamic headroom, and the rhythmic drive Naim is renowned for.
• Advanced Mechanical & Electrical Engineering – With mechanically decoupled boards, aluminium casework, and multi-stage regulated power supplies, the system achieves remarkable stability, low distortion, and reliable long-term reference performance.
• Dimensions – NAC252: 432 × 87 × 314 mm. Supercap: 432 × 87 × 314 mm. NAP300 head unit: 432 × 87 × 314 mm; NAP300 PSU: 432 × 135 × 314 mm.
• Weight – NAC252 approx. 7 kg; Supercap approx. 15 kg; NAP300 system approx. 23–25 kg, reflecting substantial transformers and isolated power architecture.
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Naim Audio NAC72 Preamplifier
• Overview – The Naim Audio NAC72 Preamplifier, introduced in the early 1990s, is a classic modular preamp known for its PRaT-driven sound, upgrade flexibility, and signature Naim musical engagement.
• Performance – Featuring discrete gain stages and swappable plug-in boards, the NAC72 offers exceptional timing, clarity, and rhythmic drive, making it one of Naim’s most celebrated vintage preamps.
• Upgrade Capability – Compatible with Naim power supplies such as HiCap and FlatCap, the NAC72 significantly improves resolution, dynamics, and noise performance when paired with higher-grade external supplies.
• System Synergy – The Naim Audio NAC72 Preamplifier works optimally with classic Naim power amplifiers, delivering cohesive timing, controlled transients, and a lively, forward presentation favored by Naim enthusiasts.
• Dimensions – Approx. 432 mm (W) × 76 mm (H) × 301 mm (D), following Naim’s classic olive-series chassis footprint for seamless rack integration.
• Weight – Around 5 kg, with a dense and well-shielded internal structure that improves noise rejection and overall signal integrity.
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Jeff Rowland Consonance Preamplifier
• Preamplifier Overview – The Jeff Rowland Consonance Preamplifier, introduced in the mid-1990s, is a reference solid-state line stage known for its ultra-low noise floor, holographic imaging, and refined tonal balance characteristic of Rowland’s early masterpieces.
• High-Resolution Line Stage – The Consonance employs fully balanced circuitry, premium discrete components, and short signal paths, ensuring exceptional transparency, natural harmonic structure, and impressive dynamic contrast with both solid-state and tube power amplifiers.
• Silent Power Architecture – Featuring Rowland’s renowned attention to power-supply regulation and isolation, the Jeff Rowland Consonance Preamplifier delivers extremely low distortion and stable channel performance, enhancing microdetail retrieval and spatial coherence.
• Precision Build Quality – Machined aluminum chassis, high-grade connectors, and vibration-resistant internal layout reinforce long-term stability, while providing the polished aesthetic and engineering elegance expected from Jeff Rowland designs.
• Dimensions – Approx. 430 mm (W) × 90 mm (H) × 300 mm (D). Designed for compatibility with standard rack systems while maintaining optimal internal airflow and cable management.
• Weight – Approx. 8–10 kg, depending on production revision, offering solid mechanical grounding that minimizes vibration and preserves low-noise signal integrity.
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Audiolab 8000Q
• Preamplifier Overview – The Audiolab 8000Q, released in the late 1990s, is a solid-state line-level preamplifier known for neutrality, low distortion, and precise signal handling, ideal for transparent two-channel audio systems.
• Reference-Grade Circuitry – The Audiolab 8000Q features fully discrete circuitry with exceptionally low noise and wide bandwidth, ensuring clean signal transfer, excellent channel separation, and highly accurate tonal reproduction across all musical genres.
• Flexible System Integration – With multiple line inputs, dual outputs, and well-managed impedance, the 8000Q integrates seamlessly with solid-state or tube power amplifiers, maintaining consistent clarity and stable system performance.
• Reliable, Minimalist Engineering – The Audiolab 8000Q emphasizes simplicity and durability, using quality components and short signal paths to reduce coloration while delivering long-term reliability demanded by audiophiles.
• Dimensions – Approx. 445 mm (W) × 74 mm (H) × 335 mm (D). Slim chassis allows easy placement in standard racks while supporting proper cable routing.
• Weight – Approx. 6 kg, offering a balanced, rigid enclosure that helps reduce vibration and maintain low-noise electronic performance.
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Naim NAC 282 Preamplifier
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Naim NAC 282 Preamplifier – Tailored for serious listeners, this pure analog-level control centre delivers gritty pace, rhythm and timing with ultra-low-noise front-end architecture for high-end system clarity.
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Precision Control & Flexible Input Architecture – Features six inputs (two configurable as DIN or RCA), an AV bypass mode, and silent microprocessor that sleeps during playback for zero interference.
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Upgradeable Power System Design – Includes a standard NAPSC supply for digital/control circuits; audio circuits can be powered via Hi-Cap, FlatCap XS or SuperCap for deeper dynamics.
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Product Dimensions – Measures 87 mm (H) × 432 mm (W) × 314 mm (D), allowing compact integration into premium racks with full featured functionality.
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Weight – Approximately 7.0 kg, meaning solid chassis build and mechanical stability while still manageable in high-end systems.
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Discrete Signal Integrity – With input impedance at 47 kΩ, output impedance < 50 Ω and precision rotary potentiometers, the NAC 282 ensures optimum coupling to downstream amplification.
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Naim Audio NAC 252 with Supercap (DR)
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Naim Audio NAC 252 with Supercap (DR) – A reference-grade analogue preamplifier driven by a separate Supercap power supply, delivering incredible clarity, ultra-low noise floor, and that hallmark Naim pace, rhythm and timing.
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Precision Input Architecture – Featuring four DIN inputs, two configurable DIN/RCA inputs, AV bypass mode and 75 mV input sensitivity, the NAC 252 offers flexible connectivity and serious signal integrity for advanced systems.
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Independent Regulation for Clean Power – With ten independently regulated power circuits fed by the Supercap-DR and separate supplies for control electronics, the NAC 252 ensures audio circuits remain fully isolated from interference.
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Upgrade-Compatible Architecture – Though its performance is impressive out of the box, the NAC 252 is compatible with further upgrades across the Naim ecosystem (e.g., SNAXO, NAPSC), making it ideal for future-proof high-end setups.
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Product Dimensions – Measures 87 mm high × 432 mm wide × 314 mm deep, ensuring compact integration in serious system racks without compromise.
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Weight Specification – Weighs approximately 7.0 kg, reflecting its robust build, tight tolerance mechanics and stable chassis for superior acoustic performance.
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Solid state pre amplifiers are known for their precision, low noise floor, and consistent performance. Using transistor-based circuits, they deliver accurate signal control and neutral sound reproduction, making them suitable for a wide range of Hi-Fi systems. Solid state pre amplifiers often offer extensive connectivity and reliable long-term operation. Because of their durability, the pre-owned market provides a practical way to access higher-tier solid state designs at better value.
SoundTribeAsia is positioned as the go-to online marketplace for new and pre-owned solid state pre amplifiers in Singapore and Malaysia. Buyers can compare brands, features, and conditions in one trusted platform. With verified sellers and transparent listings, SoundTribeAsia supports confident system upgrades.