Cayin Soul 170P is an extraordinary flag‑ship tube power amplifier that harmoniously marries the lush warmth of triode‑style tube tonality with the precision and punch of modern design. Its flexible user settings let you craft a sound signature tailored to your system—and it excels when paired with high-efficiency speakers. If your sonic priorities are musical engagement, detail, and sculpted power, this amplifier is likely to impress.
Key Features & Build Quality
- Output Tubes: Equipped with four TUNG‑SOL KT170 beam tetrodes in a pure Class A push‑pull configuration, delivering a rich and powerful tube-driven sound experience.
- Amplification Chain: Utilises two JJ 12AU7 tubes for voltage gain and two JJ 6SN7s for driver stages, along with a 17AX4GT tube rectifier for clean, stable power delivery.
- Output Power Modes: Delivers 60 W per channel (Stereo) or 120 W in Mono (both in Ultralinear mode), offering flexibility across speaker setups.
Performance & Operating Flexibility
- Selectable Negative Feedback (NFB): Two discrete feedback settings—Low (warm, expressive) and High (tight, analytical)—allow you to tailor tonal balance to speaker and music type.
- Dynamic Auto Bias System: Maintains optimal tube performance without manual adjustment and simplifies tube replacement while extending their lifespan.
- Hand-Wired Craftsmanship: Point‑to‑point wiring, silver‑plated cables, custom toroidal and EI transformers, and premium parts (Alps potentiometer, porcelain tube sockets, audio‑grade caps/resistors) result in high reliability and visual elegance.
Quick Specs Overview
- Tubes: 4× KT170, 2× 12AU7, 2× 6SN7, 1× 17AX4GT
- Power Output Stereo: 60 W × 2 / Mono: 120 W
- Feedback Settings: Low & High global NFB
- Bias Adjustment: Automatic bias servo
- Build: Fully hand-wired, heavy chassis, premium parts
- Modes: Stereo/Mono; Ultralinear only
