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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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HANA SL MK II MC Cartridge
• Product Overview – HANA SL MK II MC Cartridge, released in 2023, is a low-output moving-coil design engineered for purist analog systems seeking higher resolution and superior signal purity from dedicated MC phono stages.
• Generator Design – Updated MK II generator features improved Alnico magnet structure and refined coil winding techniques, reducing distortion while enhancing micro-detail retrieval, dynamic contrast, and low-level resolution across complex recordings.
• Sonic Performance – HANA SL MK II MC Cartridge delivers exceptional tonal balance, precise imaging, and extended frequency response, offering controlled bass, natural midrange textures, and refined treble for demanding vinyl enthusiasts.
• Specifications – Nude elliptical stylus on aluminum cantilever, 0.5 mV output, internal impedance approximately 30 ohms, recommended load above 400 ohms, optimized for high-quality low-noise moving-coil phono stages.
• Dimensions – Cartridge body measures approximately 28.5 mm (L) × 16 mm (W) × 16 mm (H), ensuring straightforward installation and compatibility with most standard half-inch mounted tonearms.
• Weight – Cartridge weight is approximately 5 g, allowing excellent compliance matching with low to medium-mass tonearms while maintaining stable tracking and consistent groove contact.
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HANA Umami Red MC Cartridge
• Product Overview – HANA Umami Red MC Cartridge, released in 2021, is a low-output moving-coil design using Alnico magnet technology and advanced body construction for maximum musicality, control, and long-term tonal consistency.
• Generator Architecture – Precision-wound copper coils and optimized magnetic flux geometry reduce distortion and improve phase coherence, delivering superior microdetail retrieval while preserving natural harmonic structure and dynamic expression.
• Sonic Character – HANA Umami Red MC Cartridge produces authoritative bass weight, lifelike midrange presence, and refined high-frequency extension, offering a balanced, emotionally engaging presentation suitable for reference-grade analog systems.
• Specifications – Nude microline stylus, boron cantilever, 0.4 mV output, internal impedance 8 ohms, recommended load above 80 ohms, optimized for high-quality moving-coil phono preamplifiers.
• Dimensions – Cartridge body measures approximately 28.5 mm (L) × 16 mm (W) × 16 mm (H), designed for standard half-inch mounting compatibility across most modern and vintage tonearms.
• Weight – Cartridge mass is approximately 10.5 g, providing excellent mechanical grounding and stable tracking when paired with medium to high-mass tonearms for controlled resonance behavior.
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Apogee Stage Speakers
• Product Overview – The Apogee Stage Speakers, released circa 1990, are full-range planar ribbon loudspeakers designed for high-resolution, low-distortion playback, delivering the open, fast transient response Apogee is renowned for.
• Ribbon Loudspeaker Performance – Featuring true ribbon midrange and tweeter elements, these speakers deliver lightning-fast transients, exceptional clarity, and expansive soundstaging that rewards high-quality amplification and careful system matching.
• Design & Sonic Character – The Apogee Stage Speakers use a dipole radiation pattern with large ribbon surfaces, producing natural tonal balance, deep image layering, and lifelike vocal reproduction unmatched by conventional dynamic driver designs.
• Specifications – Nominal impedance is approximately 3–4 ohms with sensitivity around 86 dB, requiring high-current amplifiers capable of stable low-impedance drive to unlock their full dynamic and tonal potential.
• Dimensions – Each speaker measures approximately 1220 mm (H) × 560 mm (W) × 60 mm (D), with a slim vertical profile that still demands adequate floor space and thoughtful room placement.
• Weight – Each speaker weighs roughly 32 kg, reflecting the substantial ribbon assemblies, rigid frame construction, and damping required for mechanical stability and accurate ribbon driver operation.
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HANA SH MK II MC Cartridge
• Product Overview – HANA SH MK II MC Cartridge, released in 2023, is a high-output moving-coil design engineered to deliver moving-coil transparency while remaining compatible with standard moving-magnet phono stages.
• Generator Design – Revised MK II generator uses improved Alnico magnet assembly and refined coil winding, enhancing magnetic efficiency, lowering distortion, and improving transient response across complex musical passages.
• Sonic Performance – HANA SH MK II MC Cartridge offers a balanced, dynamic sound with articulate bass, open midrange, and extended treble, making it ideal for audiophiles seeking musicality without phono-stage upgrades.
• Specifications – Nude elliptical stylus on aluminum cantilever, 2.0 mV output, internal impedance 8 ohms, recommended load 47k ohms, optimized for high-quality MM inputs with strong signal integrity.
• Dimensions – Cartridge body measures approximately 28.5 mm (L) × 16 mm (W) × 16 mm (H), ensuring easy installation and compatibility with most standard half-inch mounted tonearms.
• Weight – Cartridge weight is approximately 5 g, allowing excellent compliance matching with low to medium-mass tonearms while maintaining stable tracking and consistent groove contact.
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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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HANA Umami Blue MC Cartridge
• Product Overview – HANA Umami Blue MC Cartridge, released in 2021, is a high-performance moving-coil design using an Alnico magnet system and composite body for refined, musically engaging vinyl playback.
• Design Philosophy – A resonance-controlled Duralumin body paired with a blue resin composite top plate enhances rigidity, minimizes unwanted vibration, and allows the generator to extract maximum detail from record grooves.
• Sonic Performance – HANA Umami Blue MC Cartridge delivers balanced tonal richness, precise imaging, and excellent transient clarity, offering a natural midrange, extended treble, and authoritative bass response across diverse music genres.
• Specifications – Nude microline stylus on boron cantilever, 0.4 mV output, 6 ohm internal impedance, recommended load above 80 ohms, optimized for high-quality moving-coil phono preamplifiers.
• Dimensions – Standard cartridge dimensions of approximately 28 mm (L) × 16 mm (W) × 16 mm (H), ensuring compatibility with most tonearms using standard half-inch mounting systems.
• Weight – Cartridge weight is approximately 10.5 g, providing excellent mechanical matching with medium to high-mass tonearms for stable tracking and consistent sonic performance.
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HANA Umami Black MC Cartridge
• Product Overview – HANA Umami Black MC Cartridge, released in 2020, is a flagship moving-coil design featuring an Alnico magnet system and ultra-rigid body construction for reference-level analog playback.
• Design Philosophy – Precision-machined duralumin body with ebony top plate provides exceptional resonance control, allowing the cartridge generator to operate with greater stability, lower noise floor, and enhanced musical focus.
• Sonic Performance – HANA Umami Black MC Cartridge delivers deep, articulate bass, lifelike midrange tonality, and finely resolved treble, excelling in soundstage depth, microdynamics, and natural harmonic texture.
• Specifications – Nude microline stylus on boron cantilever, output 0.4 mV, internal impedance 6 ohms, recommended load >80 ohms, optimized for high-end MC phono stages.
• Dimensions – Standard cartridge form factor, approximately 28 mm (L) × 16 mm (W) × 16 mm (H), compatible with most tonearms using standard half-inch mounting.
• Weight – Cartridge weight approximately 10.5 g, offering excellent mass compatibility with medium to high-mass tonearms for optimal tracking and mechanical stability.
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Adcom GFP-555 Preamp and GFA-5800 Power Amp
• Classic Adcom System – The Adcom GFP-555 Preamp and GFA-5800 Power Amp, introduced in the early 1990s, deliver robust solid-state performance with high-current Class AB amplification, offering strong dynamics and clean, authoritative control.
• High-Resolution Preamp Design – The GFP-555 features low-noise circuitry, precise tone controls, a high-quality phono stage, and multiple inputs, giving the Adcom GFP-555 Preamp and GFA-5800 Power Amp excellent system flexibility.
• Powerful Amplification – The GFA-5800, designed by Nelson Pass, provides 250W per channel into 8 ohms with massive current reserves. This ensures the Adcom GFP-555 Preamp and GFA-5800 Power Amp can drive difficult speakers with ease.
• Musical, Neutral Presentation – The pairing delivers fast transient response, wide soundstage, and neutral tonal balance, making it a sought-after vintage combo for both audiophiles and collectors seeking reliable performance.
• Dimensions – Preamp: approx. 432 × 89 × 330 mm. Power amp: approx. 432 × 203 × 483 mm. Designed to fit standard audio racks with deep shelves.
• Weight – Preamp weighs about 7 kg; power amp around 28–30 kg, thanks to its heavy transformer and large heat sinks for stable high-current operation.
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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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Adcom GFP-345 Pre-Amp and GFA-535 mk2 Amplifier
• Adcom GFP-345 Pre-Amp and GFA-535 Mk2 Amplifier – A classic solid-state pairing featuring a fully Class AB power stage, offering clean, authoritative drive and exceptional value for enthusiasts seeking transparent, reliable high-fidelity performance.
• Refined Preamp Control – The GFP-345 provides precise volume management, clean signal routing, high-quality phono stage support, and low-noise circuitry, enabling a neutral presentation with impressive musical clarity across varied source components.
• Dynamic Class AB Power – The GFA-535 Mk2 delivers approximately 60W per channel into 8 ohms with robust current delivery, maintaining excellent channel separation, punchy dynamics, and stable operation even with moderately difficult loudspeaker loads.
• Synergistic System Performance – Together, the GFP-345 and GFA-535 Mk2 create a cohesive soundstage with firm bass control, open midrange, and smooth treble, making this combo a proven choice for budget-conscious yet discerning listeners.
• Dimensions – GFP-345: approx. 432 mm (W) × 76 mm (H) × 330 mm (D). GFA-535 Mk2: approx. 432 mm (W) × 140 mm (H) × 330 mm (D). Fits standard racks comfortably.
• Weight – GFP-345 weighs around 5–6 kg, while GFA-535 Mk2 weighs roughly 10–11 kg, with a solid transformer and steel chassis enhancing durability and vibration resistance.
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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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Adcom is an American audio electronics brand known for delivering high-current amplification and robust engineering at accessible price points. Rising to prominence through its power amplifiers and preamplifiers, Adcom focused on reliability, drive capability, and straightforward circuit design.
Adcom amplifiers are built with conservative engineering margins and substantial power supplies, allowing many models to remain in active use decades after release. This makes pre-owned Adcom equipment especially attractive to listeners seeking dependable amplification with lasting performance.
Across Singapore, Malaysia, and Southeast Asia, Adcom continues to appeal to value-conscious audiophiles building reliable systems. On SoundTribeAsia, Adcom equipment — new and pre-owned — is offered by verified dealers, providing transparent listings and trusted access through a regional marketplace.