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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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Telos Grounding Noise Reducer GNR V5.1
• Product Overview – Telos Grounding Noise Reducer GNR V5.1, released in the early-2020s, is a passive noise-reduction grounding device engineered to lower system noise floors and stabilise reference grounding in high-resolution audio systems.
• Grounding Technology – Utilising Telos Audio Design’s proprietary grounding architecture, this unit absorbs and dissipates stray noise, leakage currents, and RF interference, improving background silence, micro-detail retrieval, and overall system coherence.
• Sonic Benefits – The Telos Grounding Noise Reducer GNR V5.1 enhances spatial clarity, low-level resolution, and tonal purity, particularly in complex systems where multiple digital, analogue, and power components share common grounding paths.
• Specifications – Passive grounding device with ultra-low impedance internal structure, non-magnetic chassis, resonance-controlled construction, and no active circuitry, ensuring zero signal insertion loss or dynamic compression during operation.
• Dimensions – Compact chassis designed for rack or floor placement, approximately 160 mm (W) × 80 mm (H) × 260 mm (D), allowing easy integration near source, amplifier, or power distribution components.
• Weight – Approximately 3–4 kg, reflecting dense internal materials used for vibration control and noise absorption without placing undue strain on shelving or equipment racks.
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Telos Audio Design Branda Signature Speaker Cables (2.5m Shotgun)
• Product Overview – Telos Audio Design Branda Signature Speaker Cables (2.5m Shotgun), part of Telos’s high-performance Branda Series, are meticulously engineered with premium materials and conductor geometry to deliver refined clarity and musical coherence.
• Cable Engineering – Designed with precision-stranded high-purity conductors, advanced dielectric materials, and heavy shielding, the Branda Signature cables minimise electromagnetic and radio-frequency interference while preserving timing and dynamic detail.
• Sonic Character – These cables offer a balanced tonal signature with articulate bass control, open midrange presence, and smooth treble extension, making them suitable for both high-resolution solid-state rigs and lively tube systems.
• Specifications – 2.5 m length “Shotgun” configuration, optimised conductor cross-section for low resistance and controlled inductance/capacitance, precision terminations for secure contact, and mechanical damping to reduce microphonics.
• Dimensions – Each cable pair measures 2.5 m, providing flexible reach for typical loudspeaker placements without excess slack, while retaining conductor integrity and consistent electrical performance.
• Weight – Moderate weight reflective of dense conductor and shielding construction, engineered to minimise strain on speaker and amplifier terminals while maintaining a tactile, confidence-inspiring feel.
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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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TELOS AUDIO Quantum Active Power Cord
• Product Overview – The TELOS AUDIO Quantum Active Power Cord, released in 2021, is an active AC power cable using proprietary Quantum Noise Reduction technology to lower noise and enhance dynamic realism in high-end audio systems.
• Active Noise Cancellation – Incorporating an onboard active circuit powered externally, the cable actively suppresses EMI and RF noise, improving background silence, transient speed, and perceived resolution across connected source or amplification components.
• System-Level Performance Gains – Designed for DACs, streamers, preamplifiers, and power amplifiers, the TELOS AUDIO Quantum Active Power Cord enhances tonal purity, spatial depth, and low-level detail without current compression.
• Specifications – High-purity copper conductors, active quantum noise-cancellation module, standard IEC connectors, compatibility with 110–240V systems, and optimized current handling suitable for both source and amplification duties.
• Dimensions – Typical cable length varies by configuration, commonly around 1.5–2.0 meters, allowing flexible system routing while accommodating the external active module placement.
• Weight – Approximately 1.2 kg depending on length, reflecting heavy-gauge conductors, shielding, and the integrated active noise-reduction module.
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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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Telos Branda Signature Speaker Cables (2.5m)
• High-End Cable Overview – The Telos Branda Signature Speaker Cables (2.5m), launched in the early 2020s, feature precision-crafted conductors and advanced metallurgy engineered to deliver superior signal purity, dynamic contrast, and improved system coherence.
• Advanced Conductor Design – The Telos Branda Signature Speaker Cables (2.5m) employ ultra-high-purity copper and proprietary cryogenic treatment, reducing resistance and preserving harmonic detail for more open mids, extended highs, and tighter bass articulation.
• Enhanced Noise Control – With multi-layer shielding, vibration-damping geometry, and precision dielectric materials, the cables provide excellent RF rejection and lower noise floor, allowing greater transparency in complex high-resolution audio systems.
• Precision Termination – Telos’ custom CNC-machined connectors ensure superior contact stability and low-loss signal transfer, enhancing overall tonal balance and maximizing the sonic improvements provided by the Branda Signature design.
• Dimensions – Cable length: 2.5 meters per channel. Engineered with a moderate diameter for flexibility, easy cable routing, and compatibility with a wide range of speaker terminals.
• Weight – Approx. 0.7–1.0 kg per cable pair, depending on termination type, offering substantial mechanical stability without compromising ease of installation.
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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.