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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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Edge G3 Integrated Amplifier
• Overview – The Edge G3 Integrated Amplifier, released in the early 2000s, is a solid state Class AB integrated amplifier featuring high-current output stages and refined preamplification for authoritative, full-range loudspeaker control.
• Power & Drive – Delivering substantial current capability, Edge G3 Integrated Amplifier provides confident bass authority and stable performance into demanding loads, maintaining composure and dynamic headroom during complex musical passages.
• Build & Circuitry – Built with robust chassis construction and dual-mono inspired layout, the design emphasizes short signal paths and substantial power supply reserves to preserve transparency and channel separation.
• Specifications – Solid state Class AB topology, approximately 100–150 watts per channel into 8 ohms, high-current output stage, multiple line-level inputs, frequency response extending beyond 20 Hz–20 kHz with low distortion.
• Dimensions – Approximate dimensions are 430 mm wide × 150 mm high × 400 mm deep, providing substantial internal transformer space while fitting standard hi-fi racks.
• Weight – Weighing approximately 18–22 kg, the amplifier’s mass reflects its large power transformer and heat-sinking required for sustained high-current operation.
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NBS Omega IV Speaker Cable (2.8m)
• Product Overview – NBS Omega IV Speaker Cable, released in the early 2010s, is a flagship reference speaker cable designed to maximize signal purity, dynamic realism, and tonal density in ultra-high-end audio systems.
• Conductor & Dielectric Design – Utilizing NBS’s proprietary rectangular solid-core conductors and advanced dielectric materials, the cable minimizes skin effect, phase distortion, and energy storage for superior coherence and musical flow.
• Sonic Performance – NBS Omega IV Speaker Cable delivers exceptional soundstage scale, explosive dynamics, and profound low-frequency authority while preserving microdetail, harmonic richness, and natural timbre across complex recordings.
• Specifications – Ultra-low resistance and inductance geometry, heavy-gauge multi-conductor architecture, high-current capability, and precision-terminated spades or bananas optimized for reference amplifiers and full-range loudspeakers.
• Dimensions – Available in various custom lengths, typically supplied in 2.0–3.0 meter stereo pairs, with substantial cable diameter reflecting its complex internal conductor and shielding structure.
• Weight – Approximately 4–5 kg per stereo pair depending on length, indicating massive conductor mass, dense dielectric layering, and mechanically damped outer jackets.
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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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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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