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Jeff Rowland 112 Power Amplifier
• Overview – The Jeff Rowland 112 Power Amplifier, released in 2004, is a solid state Class AB stereo power amplifier delivering refined power, exceptional control, and the brand’s signature ultra-low noise performance.
• Balanced Circuit Design – Featuring fully balanced circuitry and precision-matched components, the Jeff Rowland 112 Power Amplifier delivers remarkable transparency, expansive soundstaging, and effortless dynamic scaling across demanding loudspeaker loads.
• Precision Power Delivery – With a high-current output stage and robust linear power supply, this amplifier produces authoritative bass control, smooth midrange texture, and refined high-frequency extension without harshness or strain.
• Specifications – Rated at 150 watts per channel into 8 ohms and 300 watts into 4 ohms, balanced XLR and RCA inputs, high-current output stage, frequency response 10Hz–40kHz, signal-to-noise ratio exceeding 90dB.
• Dimensions – Approximately 432 mm wide × 95 mm high × 356 mm deep, housed in a precision-machined aluminum chassis designed for thermal stability and mechanical resonance control.
• Weight – Weighs approximately 15 kg, reflecting its substantial power supply, heavy-duty transformer, and solid billet aluminum construction typical of Jeff Rowland designs.
$ 2,498.73Jeff Rowland 112 Power Amplifier
$ 2,498.73 -
Harmonix XDC-2 Power Cable (1.5m)
• Overview – Harmonix XDC-2 Power Cable, released in the early 2000s, is a Japanese audiophile-grade power cable designed to prioritise tonal naturalness, musical flow, and noise reduction over sheer current delivery.
• Design Philosophy – Developed using Harmonix’s tuning-by-ear approach, the cable focuses on resonance control, material synergy, and vibration damping to achieve a relaxed, organic presentation across analog and digital components.
• Sonic Performance – Harmonix XDC-2 Power Cable is renowned for smooth treble, rich midrange tonality, and coherent timing, making it especially attractive for tube systems and musically voiced solid-state equipment.
• Specifications – High-purity copper conductors, moderate gauge design, carefully selected dielectric materials, effective mechanical damping, and high-quality connectors optimized for stable contact and consistent AC power transfer.
• Dimensions – Commonly supplied in approximately 1.5 m length, featuring a flexible outer jacket that allows easy routing while maintaining consistent electrical and mechanical characteristics.
• Weight – Approximately 0.9 kg per cable, reflecting dense conductor materials and internal damping without excessive stiffness or stress on component IEC sockets.
$ 296.72Harmonix XDC-2 Power Cable (1.5m)
$ 296.72 -
Harmonix SYN 100 Spikes and RF909x Spike Base
• Product Overview – Harmonix SYN 100 Spikes and RF909x Spike Base, released in the mid-2000s, are vibration control accessories designed to optimize mechanical grounding, resonance dissipation, and tonal balance in high-end audio systems.
• Tuning Philosophy – Developed using Harmonix’s tuning-based approach, the combination controls energy flow rather than fully isolating components, preserving musicality, timing accuracy, and natural harmonic structure.
• System Enhancement – Harmonix SYN 100 Spikes and RF909x Spike Base improve focus, bass articulation, and soundstage stability when used under loudspeakers, racks, or electronics, especially in revealing high-resolution systems.
• Specifications – Precision-machined metal spikes with matched base interfaces, resonance-tuned materials, point-contact energy transfer, and compatibility with most speaker and rack threaded inserts for universal audiophile applications.
• Dimensions – Individual spike height is approximately 25 mm, with RF909x bases measuring roughly 50 mm in diameter, allowing discreet placement while maintaining effective mechanical coupling.
• Weight – Each spike and base set weighs approximately 150–200 g, providing sufficient mass for stability while supporting controlled resonance behavior and consistent component grounding.
$ 1,405.54 -
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.
$ 1,717.88Jeff Rowland Consonance Preamplifier
$ 1,717.88 -
Micro Seiki RX5000 Turntable
• Reference Turntable Overview – The Micro Seiki RX5000 Turntable delivers legendary analogue performance through its high-mass stainless-steel platter, precision machining and exceptional resonance control, offering a stable and highly detailed vinyl playback platform.
• Engineered Mechanical Stability – Its massive bearing assembly, bronze thrust plate and independently mounted motor system ensure ultra-low noise, superior pitch accuracy and superb micro-dynamic resolution, with one mention of Micro Seiki RX5000 Turntable.
• Modular Tonearm Flexibility – Supporting multiple tonearm bases, the design accommodates premium tonearms and MC cartridges, enabling system optimisation and wide soundstage expansion, plus one additional mention of Micro Seiki RX5000 Turntable.
• High-Mass Chassis & Isolation – Built around a thick gunmetal or stainless-steel platter and heavy base, the turntable delivers world-class vibration control, improving low-frequency authority and overall transparency in complex recordings.
• Product Dimensions – Approx. 550 mm (W) × 400 mm (D) × 180 mm (H), requiring a high-mass platform or isolation rack to maximise mechanical grounding and resonance control.
• Product Weight – Total system mass ranges between 55–65 kg depending on platter and accessories, contributing to its exceptional stability and reference-level analogue performance.
$ 9,994.92$ 10,775.78Micro Seiki RX5000 Turntable
$ 9,994.92$ 10,775.78 -
Jeff Rowland Concentra Integrated Amplifier
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Jeff Rowland Concentra Integrated Amplifier – A masterpiece of Class AB amplification, combining preamplifier finesse and power amplifier control in one chassis for pure, transparent, and emotionally engaging sound reproduction.
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Refined Class AB Topology – Delivers 100W per channel into 8Ω (170W into 4Ω), offering effortless dynamics, exceptional headroom, and authoritative grip across complex musical passages.
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Precision Analog Engineering – Features fully balanced circuitry, ultra-low-noise design, and gold-plated connectors, ensuring perfect signal integrity and channel separation for uncompromised performance.
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Timeless Design and Build – Machined from solid aircraft-grade aluminum, the Jeff Rowland Concentra Integrated Amplifier combines elegance, reliability, and the hallmark sonic purity of Rowland engineering.
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Product Dimensions – 430 mm (W) × 100 mm (H) × 400 mm (D); compact yet substantial for a high-current integrated amplifier.
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Weight – Approximately 22 kg; heavy-duty chassis ensures exceptional stability, heat dissipation, and resonance control.
$ 2,967.24Jeff Rowland Concentra Integrated Amplifier
$ 2,967.24 -
Harmonix is a Japanese audio brand specialising in system tuning accessories focused on resonance control, mechanical grounding, and vibrational optimisation. The brand approaches audio reproduction as a holistic system, recognising that mechanical behaviour and energy flow play a critical role in overall sound quality.
Harmonix products include cables, tuning devices, and isolation accessories designed to fine-tune tonal balance and system coherence. Because these products are based on physical principles rather than rapidly changing technology, pre-owned Harmonix items remain highly relevant when properly maintained. Many enthusiasts use Harmonix products incrementally to refine established systems rather than replacing core components.
Across Singapore, Malaysia, and Southeast Asia, Harmonix appeals to experienced audiophiles seeking subtle but meaningful system optimisation. On SoundTribeAsia, Harmonix products — new and pre-owned — are listed by verified dealers, offering transparent sourcing and trusted access through a curated regional marketplace.