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BAT REX 500 Power Amplifier
• Overview – BAT REX 500 Power Amplifier, released in 2023, is a flagship Class AB solid-state amplifier using N-channel MOSFET output stages and a dual-mono architecture for reference-level dynamics and authority.
• Power Architecture – Designed with Balanced Audio Technology’s SuperPak+ power supply and zero global feedback, the REX 500 delivers effortless control, fast transients, and unwavering stability into demanding loudspeaker loads.
• Sonic Performance – With spectral balance, expansive soundstaging, and deep transient grip, this amp scales orchestral crescendos and subtle passages alike, preserving musical detail and impact even at high listening levels.
• Specifications – BAT REX 500 Power Amplifier offers 500 watts per channel into 8 ohms and 1000 watts into 4 ohms, fully balanced input-to-output topology, wide 3 Hz–250 kHz bandwidth, high slew rate, and fuseless protection for uninterrupted power delivery.
• Dimensions – Approx. 483 mm (W) × 254 mm (H) × 597 mm (D), with a substantial chassis and thermal design that supports extended high-power operation without sag or coloration.
• Weight – Approximately 63 kg, reflecting massive power supplies, dual-mono construction, and extensive heatsinking to ensure long-term reliability and minimal distortion under load.
• Product Review –
https://www.hifinews.com/content/bat-rex-500-power-amplifier
https://www.stereophile.com/content/balanced-audio-technology-rex-500-power-amplifier
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SoulNote A-2 Ver. 2 Integrated Amplifier
Soulnote A-2 v2
Soulnote A-2 v2 is a fully balanced, non NFB integrated amplifier designed to preserve timing, texture, and dynamic swing while offering flexible operating modes for real systems.
Design and engineering
The A-2 v2 carries Soulnote’s discrete, wide bandwidth gain architecture with a short signal path and mechanical tuning derived from the Series 3 program. Revisions to device selection, biasing, and grounding reduce stored energy and lower audible residue, yielding cleaner transients and a more stable image.
What changed from A-2 (previous version)
The v2 platform strengthens current delivery and simplifies the voltage gain loop for higher purity. The driver stage also uses the same TO3P transistor as the output stage. By passing a large current through the driver, it instantly compensates for HFE fluctuations caused by current changes in the output stage. This is the biggest difference and breakthrough from the prior version. The power amp mode now hard bypasses selector and volume control for those who prefer a separate preamp. Chassis and top cover treatment improve resonance control compared to the earlier A-2.
Connectivity and control
Balanced and single ended inputs are relay switched, with a balanced attenuator for consistent channel tracking. Four modes cover integrated stereo, bi amp mono, power amp stereo, and power amp bi amp. Control logic is isolated so audio circuits remain quiet during operation.
What distinguishes it
Fast, high current drive with a lively, uncompressed presentation and the flexibility to act as a true power amp when required.
Who it is for
Listeners who value natural timing, wide bandwidth clarity, and the option to reconfigure the amplifier as their system evolves.
In the box
Main unit, metal remote control, AC power cable, spike feet, documentation.
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SOULNOTE A-3 Reference Integrated Amplifier
• Overview – SOULNOTE A-3 Reference Integrated Amplifier, released in 2021, is a solid-state Class AB integrated design without DAC or phono, engineered for ultimate signal purity and unrestricted current delivery.
• Circuit Philosophy – Built around SoulNote’s zero-feedback, non-parallel architecture, the amplifier prioritises instantaneous current response, wide bandwidth, and natural harmonic flow, appealing strongly to purist audiophiles.
• Sonic Character – SOULNOTE A-3 Reference Integrated Amplifier delivers exceptional dynamic contrast, dense tonal colour, and expansive soundstage depth, excelling with difficult loudspeaker loads and revealing high-resolution source components.
• Specifications – Rated at approximately 120 W per channel into 8 ohms and 240 W into 4 ohms, with ultra-high current capability, wide frequency response, and discrete output devices optimised for low impedance control.
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SoulNote A-1 Ver. 2 Integrated Amplifier
• Product Overview – SoulNote A-1 Ver. 2 Integrated Amplifier, released in 2022, is a solid-state Class AB integrated amplifier using Soulnote’s zero-feedback philosophy, delivering exceptional speed, transparency, and natural musical flow.
• Circuit Architecture – Designed with fully discrete, non-NFB circuitry and simplified signal paths, the amplifier prioritises phase accuracy, micro-dynamic resolution, and tonal purity, appealing to listeners seeking uncoloured, high-resolution playback.
• Sound Performance – The SoulNote A-1 Ver. 2 Integrated Amplifier offers agile bass control, vivid midrange articulation, and extended treble clarity, pairing effortlessly with revealing loudspeakers and high-quality digital or analog sources.
• Specifications – Output power is approximately 80 W per channel into 8 ohms and 160 W into 4 ohms, featuring wide bandwidth, high current delivery, and a robust linear power supply.
• Dimensions – Approximate chassis dimensions are 454 mm (W) × 179 mm (H) × 407 mm (D), housed in a resonance-controlled aluminium enclosure optimised for electrical stability and thermal management.
• Weight – The unit weighs approximately 24 kg, reflecting its substantial transformer, high-capacity power supply components, and rigid mechanical construction designed to minimise vibration and noise.
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Aavik U-588 Unity
• Aavik U-588 Unity Overview – The Aavik U-588 Unity, introduced in the late 2010s, is a flagship Class D solid-state integrated amplifier with premium DAC functionality, offering exceptional musical resolution, ultra-low noise, and stunning dynamic power.
• Advanced Noise-Reduction & Resonance Control – Built with Aavik’s Tesla coil noise-suppression system, dither circuitry, and resonance-optimized chassis design, the Aavik U-588 Unity delivers remarkable clarity, microdynamic precision, and tonal purity across all sources.
• High-Current Class D Authority – The Aavik U-588 Unity features massive current reserves, lightning-fast transient response, and exceptional speaker control, enabling effortless handling of complex music passages at realistic listening levels.
• Premium DAC and Connectivity – Integrated with Aavik’s high-end digital architecture, the U-588 provides ultra-clean digital conversion, low-jitter performance, and flexible input options ideal for modern streaming and high-resolution playback systems.
• Dimensions – Approx. 102 mm (H) × 384 mm (W) × 400 mm (D), with a low-profile yet substantial chassis designed to minimize vibration and enhance electrical stability.
• Weight – Around 12 kg, reflecting its heavy shielding, robust power supply, and resonance-controlled construction.
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Cayin A-88TMK2
• Cayin A-88T MK2 Integrated Amplifier Overview – The Cayin A-88T MK2, introduced in the mid-2010s, is a Class AB tube integrated amplifier featuring EL34/KT88 compatibility and high-quality phono input options for vinyl enthusiasts.
• Versatile Tube Power Architecture – Designed to run either EL34 for sweeter midrange or KT88 for stronger dynamics, the A-88T MK2 offers flexible voicing to match various loudspeakers and listening preferences.
• High-Grade Output Transformers – The amplifier uses wide-bandwidth, handcrafted output transformers, ensuring improved transient control, low distortion, and a richly layered soundstage with excellent separation across complex musical passages.
• Premium Phono and Line-Stage Performance – With a robust tube line stage and quiet phono circuit, the Cayin A-88T MK2 excels in delivering natural tone, dynamic expression, and engaging musical flow from both digital and analog sources.
• Dimensions – Approx. 420 mm (W) × 210 mm (H) × 360 mm (D), providing a stable footprint with ample space for heat dissipation crucial for tube amplifier operation.
• Weight – Around 23–25 kg, benefiting from heavy-duty transformers, a steel-reinforced chassis, and vibration-resistant construction for long-term performance stability.
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Cayin M-6
• Cayin M-6 Integrated Amplifier Overview – The Cayin M-6 Integrated Amplifier, introduced in the early 2000s, is a Class AB hybrid-inspired solid-state design offering high-current delivery and refined analog input stages for expressive musical performance.
• Dynamic and Engaging Sound – The Cayin M-6 produces authoritative bass, vivid midrange presence, and open treble extension, delivering a lively and detailed presentation well-suited for a wide range of modern loudspeakers.
• High-Current Output Capability – With a robust transformer and carefully tuned circuitry, the Cayin M-6 maintains excellent control over demanding speaker loads, ensuring stable power, fast transients, and consistent dynamic drive.
• Precision Analog Engineering – Known for its warm yet neutral voicing, the Cayin M-6 integrates low-noise components and high-quality signal paths to preserve clarity, tonal balance, and long-term reliability.
• Dimensions – Approx. 430 mm (W) × 150 mm (H) × 380 mm (D), allowing practical placement while providing adequate ventilation for optimal operating stability.
• Weight – Roughly 16–18 kg, supported by a heavy power transformer and reinforced chassis that reduce vibration and improve overall electrical and acoustic performance.
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Mistral DT-307A
• Mistral DT-307A Overview – The Mistral DT-307A is a compact, budget-friendly tube hybrid amplifier featuring Class AB output and tube-driven preamplification, delivering smooth midrange warmth and engaging musicality for small-room listening.
• Hybrid Tube/Solid-State Performance – Combining vacuum-tube input stages with solid-state power delivery, the DT-307A offers enhanced harmonic richness, improved detail retrieval, and a spacious presentation compared to typical entry-level integrated amplifiers.
• Versatile Connectivity – Designed for modern users, the Mistral DT-307A includes multiple analog inputs, subwoofer output, and speaker A/B capability, allowing flexible integration into desktop, study, or compact hi-fi setups.
• Efficient Drive Capability – Despite its compact size, the DT-307A provides enough power to match well with sensitive bookshelf speakers, offering clean dynamics, low distortion, and a pleasantly warm tonal balance for daily music enjoyment.
• Dimensions – Approx. 140 mm (H) × 260 mm (W) × 220 mm (D), allowing easy placement on desks, shelves, or small racks while maintaining proper ventilation for tube operation.
• Weight – Roughly 4–5 kg, combining a lightweight footprint with sufficient chassis rigidity to support stable tube performance and reduce vibration-related noise.
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Amplifiers are the core of any Hi-Fi system, responsible for driving speakers and shaping overall sound quality, dynamics, and control. Different amplifier designs offer varying power output, tonal characteristics, and system compatibility, making proper matching essential for optimal performance. Factors such as speaker sensitivity, listening volume, and room size all influence amplifier selection. Well-built amplifiers are engineered for long-term reliability, which makes the pre-owned market a practical way to access higher-tier designs at better value.
SoundTribeAsia is positioned as the go-to online marketplace for new and pre-owned amplifiers in Singapore and Malaysia. Buyers can compare integrated amplifiers, preamplifiers, and specialised designs across multiple brands in one trusted platform. With verified sellers, transparent listings, and regional availability, SoundTribeAsia supports confident amplifier purchases for both new system builds and upgrades.