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Cayin - Soul 170P - Power Amplifier (Available for Pre-Order)
Cayin - Soul 170P - Power Amplifier (Available for Pre-Order)
Cayin - Soul 170P - Power Amplifier (Available for Pre-Order)
Cayin - Soul 170P - Power Amplifier (Available for Pre-Order)
Cayin - Soul 170P - Power Amplifier (Available for Pre-Order)
Cayin - Soul 170P - Power Amplifier (Available for Pre-Order)

Cayin

Cayin - Soul 170P - Power Amplifier

$15,999.00

In stock

Delivery Australia-wide

Shipping calculated at checkout

Pick up from The Audio Tailor Usually ready in 2-4 days. We'll let you know when it's ready to collect. Store info
9/20 Rivergate Pl, Murarrie QLD 4172
Tuesday to Friday
9am to 5pm
Saturday
9am to 3pm
Sunday and Monday
Closed
Get directions Call 1300 308 711 Book a listen

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Unit 9/20 Rivergate Place, Murarrie, Qld 4172 Get directions
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Overview

Soul 170P

Brand
Cayin
Category
Power Amplifiers

Not sure it's the right fit for your room or system? Our team can talk you through it.

Call 1300 308 711
Our thoughts

Class A is new to the Soul series, and it arrives with four KT170 beam tetrodes in push-pull, aimed at a fresher reading of that tube's character. Stereo and mono are a rear-panel switch apart, so one chassis can serve two channels or a high-power mono pair.

The 60W stereo and 120W mono ratings mean one chassis can cover two-channel listening and heavier speaker loads without a second amplifier. High and Low feedback settings are intended to shift the balance between openness and tighter control. Dynamic Auto Bias lets a power tube be swapped without manual bias adjustment, so tube changes stay straightforward.

We'd point this towards listeners who favour the KT170 voice and want one amplifier spanning stereo and high-power mono, with speakers that demand more power. Speaker impedance and whether mono mode is the right call are worth a proper conversation, so talk it through with our team by phone or in person.

The Audio Tailor team, Murarrie showroom

The Cayin Soul 170P is our latest power amplifier built upon over 32 years of Cayin’s expertise in vacuum tube amplification. Designed to deliver exceptional musicality and power, it adopts a Class A architecture with powerful TUNG-SOL KT170 tubes. This is also the very first time we’ve implemented Class A amplification in our Soul series amplifier, aiming to present a fresh and emotional take on the KT170 sound.

The Soul 170P offers both Stereo and Mono operating modes to accommodate speakers with higher power demands.

Tubes & Topology

At the heart of the Soul 170P are four TUNG-SOL KT170 beam tetrodes, operating in a Class A push-pull configuration. The amplifier also features:

  • Voltage Amplification Tubes: 2 × 12AU7. In the voltage amplification stage, two JJ 12AU7 tubes are responsible for initial signal gain, providing the necessary voltage amplification before driving the output stage. Their low distortion and noise characteristics contribute to stable signal handling.
  • Driver Tubes: 2 × 6SN7. Employed in the driver stage, the JJ 6SN7, known for its musicality and powerful drive, contributes to a sound that’s both emotionally engaging and analytically revealing.
  • Rectifier Tube: 1 × 17AX4GT. This classic rectifier tube supplies a stable DC voltage to the driver stage, ensuring reliable performance and a refined sound with beloved tube body musical expression.

Soul 170P Flexible Operating Modes

Users can easily switch between Stereo and Mono operation using a secure rear-panel switch, allowing the Soul 170P to be used in both two-channel and high-power mono configurations.

Soul 170P Negative Feedback Circuitry

To achieve a more refined and natural sound presentation, the Soul 170P employs a carefully tuned Negative Feedback (NFB) circuit. Cayin engineers applied a moderate global feedback loop, striking a balance between control and musical expression.

In addition, the Soul 170P features two selectable NFB levels—High and Low—allowing users to fine-tune the amplifier’s sound signature.

Choose Low for a more open, expressive, and emotionally engaging sound, or High for tighter control, improved precision, and a more analytical presentation. This flexibility allows the Soul 170P to fully showcase their character across a wide range of speakers and musical genres.

Specifications

Technical details

Manufacturer specifications. Want to know how it compares with something else? Ask our team.

Stereo Mode60W (Ultralinear, per channel)
Mono Mode120W (Ultralinear, per channel)

Dynamic Auto Bias

  • Silver-plated internal wiring
  • Aluminium alloy anti-resonance feet
  • Customised hand-wound Toroidal power transformer and EI wide-band output transformer

    • Protective Features

    • Tube soft-start circuit (60-second delay)
    • MCU-controlled protection logic
    • BMI indicators (to detect power tube faults and automatically engage safety mode)

    Connectivity

    • Inputs: 1 × XLR, 1 × RCA
    • Speaker Terminals: 4Ω and 8Ω outputs

    The Soul 170P features a fully integrated Dynamic Auto Bias servo circuit, allowing seamless power tube replacement without manual adjustment. This system precisely regulates the operating status of each KT170 tube, ensuring optimal matching and extending tube lifespan—all while maintaining operational safety and tube longevity.

    Component Selection & Internal Build

    The amplifier is hand-assembled with point-to-point wiring, ensuring low signal loss, minimum crosstalk and interference.

    Specifications

    • Rated Output Power: Stereo Mode: 32W + 32W (RMS, Triode mode) 60W + 60W (RMS, Ultralinear mode); Mono Mode: 64W (RMS, Triode mode) 120W (RMS, Ultralinear mode)
    • Frequency Response: 8Hz – 70kHz (–3dB, RCA/XLR)
    • Total Harmonic Distortion: less than 2% at rated output power 105dB (RCA, A-weighted)
    • Signal-to-Noise Ratio: 102dB (XLR, A-weighted)
    • Input Sensitivity: 820mV (NFB: LOW) 960mV (NFB: HIGH)
    • Input Impedance Output: 18kΩ
    • Output Input: 4Ω, 8Ω
    • Terminals: 1 × RCA (pair), 1 × XLR (pair)
    • Tubes Used: KT170 × 4 12AU7 / ECC82 × 2 6SN7 × 2 17AX4GT × 1
    • Dimensions: 430mm × 420mm × 238mm
    • Net Weight: 37.5kg
    • Maximum Power Consumption: 420W (Maximum)

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Saturday
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