If you’re searching for the ultimate tube amp experience, our Cayin - Soul 170P Power Amplifier Review unveils why this Class A powerhouse is destined to become the benchmark for audiophiles everywhere. With its TUNG-SOL KT170 output tubes and meticulously hand-wired internal layout, the Soul 170P conjures a listening experience that is as emotionally captivating as it is technically precise.

Marvelous Class A Architecture Bringing KT170 to Life

At the heart of the Cayin Soul 170P Power Amplifier lies a meticulously designed Class A amplifier stage powered by four TUNG-SOL KT170 beam tetrodes. Running in a push-pull configuration, the KT170s deliver a commanding yet refined 60W per channel in Stereo mode (Ultralinear) and up to 120W in Mono mode—ideal for both sensitive bookshelf speakers and demanding floorstanders.

Precision Voltage and Driver Stages

Preceding the output stage, two JJ 12AU7 voltage amplification tubes offer low noise and minimal distortion, laying a clean, dynamic foundation. The subsequent JJ 6SN7 driver tubes inject lush harmonics and robust drive, striking a fine balance between emotional engagement and analytical precision. A classic 17AX4GT rectifier ensures stable DC supply with characteristic tube warmth.

Ultimate Flexibility with Stereo and Mono Modes

Whether you’re running delicate high-sensitivity monitors or power-hungry floorstanders, the secure rear-panel mode switch lets you toggle between Stereo (60W×2) and Mono (120W) operation seamlessly. This versatility makes the Soul 170P an exceptional choice for hobbyists seeking to upgrade their two-channel system as well as professionals requiring higher output for larger listening rooms.

Bespoke Negative Feedback Circuitry

Cayin’s thoughtfully tuned global negative feedback (NFB) loop offers two selectable settings—Low for a more open, expressive presentation, and High for enhanced control and pinpoint accuracy. This tailored approach gives you the freedom to match the amplifier’s character to your speaker’s personality and the music genre at hand.

Reliability Through Dynamic Auto Bias and Quality Build

Maintenance is a breeze thanks to the fully integrated Dynamic Auto Bias servo circuit, which optimises each KT170 tube’s performance and extends tube lifespan without manual bias adjustments. Hand-assembled point-to-point wiring, a custom toroidal power transformer, silver-plated internal wiring, and aluminium alloy anti-resonance feet reflect Cayin’s unwavering commitment to build excellence.

Who Should Embrace the Soul 170P?

The Soul 170P shines for discerning audiophiles craving analogue warmth with modern-day power and precision. If you’re running high-efficiency speakers or looking to push larger floorstanders with effortless authority, this amplifier will reward you with textured mids, juicy bass, and extended treble lift.

To explore how the Soul 170P integrates with your system, give our experts a call on 1300 308 711 or email sales@theaudiotailor.com.au for a personalised consultation.

Pros & Cons

• Pros: Class A KT170 output for unmatched musicality and headroom; selectable Stereo/Mono modes; dual-level NFB for tonal versatility; Dynamic Auto Bias for ease of use; robust build with premium components.
• Cons: At 37.5 kg, it’s a substantial unit; dedicated tube enthusiasts may prefer occasional manual bias checks.

Unlock Your System’s Full Potential

With over three decades of vacuum tube amplifier expertise, the Cayin Soul 170P Power Amplifier is a genuine tour de force. Its combination of crystalline detail, dynamic expression, and reliable operation makes it a must-have for any true hi-fi aficionado. Pre-order yours today and talk to our team at The Audio Tailor to reserve one of the first allocations—your listening room will thank you.