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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.
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Siltech Ruby Mountain 2 Power Cable (1.5m)
• Overview – Siltech Ruby Mountain 2 Power Cable, released in 2002, is a high-end power cord engineered to reduce noise, improve current delivery, and enhance musical clarity in reference audio systems.
• Conductor Technology – Utilises Siltech’s proprietary G7 silver-gold alloy conductors with advanced dielectric insulation, delivering low resistance, excellent conductivity, and superior preservation of micro-dynamics and tonal purity.
• Sonic Performance – Siltech Ruby Mountain 2 Power Cable delivers a quieter noise floor, improved bass authority, enhanced midrange texture, and refined treble extension, benefiting amplifiers, source components, and digital front ends.
• Specifications – Features multi-strand G7 silver-gold conductors, heavy shielding for EMI and RFI rejection, high-current capability up to 16A, and premium connectors ensuring secure contact and consistent power transfer.
• Dimensions – Typically supplied in 2.0 m length, with a thick, flexible jacket designed for durability and ease of routing in high-end audio racks and power distribution setups.
• Weight – Approximately 1.0 kg for a 2.0 m cable, reflecting dense conductor geometry, advanced shielding layers, and robust connector construction.
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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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Octave RE 320 and Super Black Box PS
• Octave RE 320 and Super Black Box PS – This powerful Class A/AB tube power amplifier system delivers exceptional dynamic range, stability, and tonal purity, with the Super Black Box providing massive energy reserves for demanding loudspeakers.
• High-Current Tube Output Stage – The RE 320 uses optimized KT150/KT120 tubes with intelligent bias control, producing remarkable drive, low distortion, and enhanced linearity for systems requiring both finesse and authoritative power.
• Super Black Box Power Expansion – Adding the Super Black Box dramatically improves current delivery, bass solidity, and transient response by multiplying capacitor storage capacity, resulting in cleaner microdynamics and deeper control.
• Precision German Engineering – Octave’s advanced power management, soft-start circuitry, and protective systems ensure long tube life, stable operation, and a highly refined presentation across complex musical passages.
• Dimensions – RE 320 approx. 451 mm (W) × 210 mm (H) × 460 mm (D). Super Black Box approx. 220 mm (W) × 180 mm (H) × 395 mm (D). Both units built for reference-grade rack placement.
• Weight – RE 320 approx. 28 kg; Super Black Box approx. 20 kg. Octave RE 320 and Super Black Box PS Heavy chassis design enhances vibration control, power stability, and overall sonic refinement.
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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.
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Jeff Rowland Design Group is an American high-end audio manufacturer recognised for precision machining, minimalist industrial design, and refined circuit implementation. The brand emphasises power supply integrity and low-noise operation to achieve clarity and control.
Jeff Rowland components are built with exceptional mechanical tolerances and conservative engineering, contributing to long-term stability. This makes pre-owned Jeff Rowland equipment especially attractive to audiophiles seeking reference-grade electronics with enduring value.
Across Singapore, Malaysia, and Southeast Asia, Jeff Rowland is associated with refined, long-term system building. On SoundTribeAsia, Jeff Rowland equipment — new and pre-owned — is offered by verified dealers, providing transparent listings through a trusted regional marketplace.