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Airtight ATM4 Tube Amplifier
• Product Overview – Airtight ATM4 Tube Amplifier, released in 1998, is a solidly engineered Class AB push-pull tube power amplifier using EL34 output valves, renowned for musical coherence, tonal purity, and long-term reliability.
• Circuit Topology – Hand-wired point-to-point construction with high-quality output transformers and conservative operating parameters ensures low distortion, excellent bandwidth, and stable performance across a wide range of loudspeaker loads.
• Sonic Performance – Airtight ATM4 Tube Amplifier delivers a harmonically rich midrange, controlled bass authority, and smooth extended treble, excelling in realism, spatial depth, and long, fatigue-free listening sessions.
• Specifications – Stereo power output approximately 36 watts per channel into 8 ohms, EL34 output tubes, 4/8 ohm taps, wide bandwidth response, and high-quality valve rectification supporting dynamic musical transients.
• Dimensions – Approx. 360 mm (W) × 220 mm (H) × 310 mm (D), featuring a compact yet robust chassis layout optimized for heat dissipation and mechanical stability.
• Weight – Approximately 21 kg, reflecting heavy-duty transformers, thick chassis materials, and conservative mechanical design essential for stable tube operation and long-term sonic consistency.
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Unison Research Tube CD Player
• Unison Research Tube CD Player – This refined tube-output CD player blends Italian craftsmanship with vacuum-tube musicality, producing a warm, fluid, and harmonically rich presentation that appeals to serious analogue-leaning digital listeners.
• Tube-Enhanced Output Stage – Featuring high-quality triode tubes in the analogue stage, the player delivers natural timbre, smooth textures, and expressive dynamics that elevate standard CD playback into a more immersive experience.
• Precision Digital Architecture – Employs a robust transport mechanism and low-noise DAC implementation designed to minimise jitter, improving resolution, micro-detail, and overall transparency while maintaining the signature Unison tonal balance.
• System Synergy – Works beautifully with both tube and solid-state amplification, offering a spacious soundstage and excellent musical flow, making it ideal for refined 2-channel listening systems.
• Dimensions – Approx. 435 mm (W) × 95 mm (H) × 360 mm (D), fitting easily into standard racks while providing sufficient tube ventilation.
• Weight – Roughly 11–13 kg, reflecting its solid chassis, quality power supply, and robust transport assembly designed for long-term reliability.
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