Cayin IHA-8 silver

The Cayin iHA-8 is a headphone amplifier featuring a fully balanced architecture operating in pure Class A. It delivers up to 9500 mW at 16 ohms in balanced mode. Its discrete component circuit, incorporating Toshiba JFET transistors and high-quality MOSFETs, offers a sound reproduction that is both dynamic and warm. Housed in a compact chassis, the Cayin iHA-8 stands out as a versatile solution, capable of efficiently powering both demanding planar headphones and sensitive in-ear monitors.

Uncompromising Technical Architecture

The Cayin iHA-8 is built on a rigorous audiophile design where every detail has been optimized for sonic performance. Its fully balanced architecture uses four separate amplification channels with discrete MOSFETs operating in pure Class A. This approach ensures faithful audio signal reproduction with minimal distortion and maximum dynamics.

The input stage uses Toshiba 2SK209 JFET transistors mounted in double parallel per channel, renowned for their low noise and excellent linearity. These components are paired with an output stage made up of 24 Vishay MOSFET transistors, delivering powerful and precise amplification. The design minimizes negative feedback to preserve the natural musicality of the signal, while oversized copper rails optimize heat dissipation, ensuring perfect stability even during the most demanding musical passages.

Volume control benefits from a sophisticated approach with two NJR MUSES72320 electronic resistor ladder circuits, complemented by a high-quality ALPS potentiometer. This combination ensures precise and transparent volume adjustment without signal degradation or channel imbalance.

Exceptional Power Supply and Output

The power supply is one of the Cayin iHA-8’s key strengths. It relies on a 75-watt toroidal transformer with low magnetic radiation, paired with filtering capacitors totaling 50,000 μF. This substantial energy reserve allows the amplifier to respond instantly to the dynamic demands of music, never showing any sign of weakness.

The output power reaches impressive heights, with 9500 mW at 16 ohms in balanced mode (4.4 mm jack and XLR outputs) and 3600 mW in unbalanced mode (6.35 mm jack output). These figures place the iHA-8 among the most powerful headphone amplifiers on the market, effortlessly driving notoriously difficult planar headphones such as the Abyss, HIFIMAN Susvara, or Audeze LCD-5.

A distinctive feature of the iHA-8 is its “Hyper” mode, which increases the operating voltage beyond 30 volts to maximize power reserves. This mode allows you to fully exploit the potential of the most demanding headphones, revealing sonic nuances usually inaccessible with less capable amplifiers.

Comprehensive Connectivity for Maximum Versatility

The Cayin iHA-8 offers generous connectivity to meet all the needs of modern audiophiles. On the rear, there are two balanced XLR inputs and two unbalanced RCA inputs, allowing multiple sources to be connected simultaneously. A switch lets you toggle between standard input mode (line level) and preamp mode, where only the MOSFET power stage is used. This latter option is particularly interesting when pairing the amplifier with the Cayin iDAC-8 DAC/preamp.

On the front panel, three headphone outputs are available: a 6.35 mm unbalanced jack, a 4.4 mm Pentaconn balanced jack, and a 4-pin XLR balanced output. This triple option allows you to use any audiophile headphone on the market without an adapter. A two-position gain selector (+12 dB in high position) completes the setup, allowing precise adjustment of amplification to match the impedance and sensitivity characteristics of each headphone.

The remarkably low output impedance (0.4 ohms balanced, 0.2 ohms unbalanced) ensures a high damping factor, guaranteeing optimal control of the drivers and precise bass reproduction, regardless of the headphone’s impedance.

A Sound Signature Combining Precision and Warmth

Operating in pure Class A gives the Cayin iHA-8 a distinctive sound signature, combining the transparency and precision of a high-end amplifier with the warmth and harmonic richness traditionally associated with this topology. The amplifier excels in its ability to reveal the subtlest nuances of musical interpretation while maintaining a natural and engaging presentation.

The soundstage unfolds with breadth and precision, especially in balanced mode where channel separation reaches an excellent 103 dB. Instruments are positioned with surgical accuracy in a convincing three-dimensional space. Bass frequencies are reproduced with authority and control, never bleeding into the midrange. The latter stands out for its transparency and rich texture, while the highs shine with their extension and finesse, never becoming harsh.

Dynamics are one of the device’s strong points, with a remarkable ability to render both the subtlest contrasts and the most explosive passages. This quality is especially appreciated on complex orchestral recordings or rock and electronic productions rich in dynamic variations.

Perfect Integration into the Cayin Ecosystem

The Cayin iHA-8 is part of the manufacturer’s new i-8 series, alongside the iDAC-8 digital-to-analog converter and the iDAP-8 network player. These three devices share identical dimensions (270 x 215 x 70 mm) and a consistent design, allowing them to be stacked to form a complete and compact audio system.

Pairing with the iDAC-8 is particularly recommended, as it features a preamplifier switchable between tube and transistor modes. By connecting the iDAC-8 to the iHA-8’s preamp input, you get an optimized signal chain where each component fully expresses its potential. This configuration is especially interesting in tube mode, adding an extra touch of warmth and harmonic richness to the listening experience.

The complete trio (iDAP-8, iDAC-8, iHA-8) forms a comprehensive audiophile solution occupying minimal space, ideal for setups where space is at a premium. This modular approach also allows for progressive system upgrades, starting with the amplifier alone and adding other components later.

A Compact Design Combining Elegance and Robustness

Despite its compact dimensions (270 x 215 x 70 mm), the Cayin iHA-8 has a commanding presence thanks to its brushed aluminum front panel and sturdy chassis. Its 5 kg weight attests to the quality of the internal components, notably the toroidal transformer and the heat sinks required for Class A operation.

The front panel features an ergonomic layout with a large central volume knob, surrounded by various controls: power switch, source selector, Hyper mode switch, gain selector, and line/preamp switch. The three headphone outputs are aligned at the bottom of the front panel for easy access.

The understated and elegant aesthetic, typical of Cayin products, blends seamlessly into any environment, from a professional office to an audiophile living room. The silver finish adds an extra touch of refinement, underscoring the device’s premium status.

Technical Specifications: Cayin iHA-8

General Overview

• Fully balanced Class A headphone amplifier for desktop use
• Design: fully balanced discrete component circuit with FET topology
• Amplification modes:
  • Standard mode
  • Hyper mode (high operating voltage >30 V for maximum power)

Design and Circuitry

• Circuit: 4-channel design with discrete MOSFETs in pure Class A
• Volume control: electronic (2x NJR MUSES72320 resistor ladder), ALPS encoder
• Power supply: 75 W toroidal transformer, 50,000 µF filter capacitors
• JFET input stage (Toshiba 2SK209, for low distortion and high dynamics)
• Discrete MOSFET output stage (24x Vishay MOSFETs)
• Minimal negative feedback for optimal open-loop linearity
• Cooling: oversized copper rails and enhanced heat dissipation

Special Features

• Hyper mode: activates a higher supply voltage to increase power reserves
• Balanced design: full signal processing for maximum transparency
• Ideal for all types of headphones:
  • Demanding planar headphones (Abyss, HIFIMAN Susvara, Audeze LCD-5)
  • Sensitive in-ear monitors (e.g., Subtonic Storm)
• Extremely high current output, ideal for low-impedance or power-hungry headphones

System Compatibility

• Perfectly combinable with:
  • Cayin iDAC-8 (digital-to-analog converter)
  • Cayin iDAP-8 (digital audio player / streamer)
  • i-Series 8 tower setup: ideal for audio systems with limited space

Connectivity

• Inputs:
  • 2x XLR (balanced)
  • 2x RCA (unbalanced)
• Headphone outputs:
  • 1x 6.35 mm (unbalanced)
  • 1x 4.4 mm Pentaconn (balanced)
  • 1x 4-pin XLR (balanced)
• Physical controls: power on/off, source selection, hyper mode, gain, line/preamp, volume knob

Audio Performance

• Frequency response: 10 Hz – 80 kHz (±0.5 dB)
• Output impedance:
  • Balanced outputs: 0.4 Ω
  • Unbalanced outputs: 0.2 Ω
• Channel separation:
  • Balanced outputs: 103 dB (A-weighted, 1 kHz, 32 Ω)
  • Unbalanced outputs: 68 dB (A-weighted, 1 kHz, 32 Ω)
• Gain control: low gain, high gain +12 dB
• Operating modes: line level input (STD), preamp input (power amplifier mode)

Balanced Outputs

• Output power per channel:
  • 16 Ω: 7000 mW (standard), 9500 mW (hyper)
  • 32 Ω: 5400 mW (standard), 7700 mW (hyper)
  • 64 Ω: 3600 mW (standard), 5000 mW (hyper)
  • 128 Ω: 2100 mW (standard), 3000 mW (hyper)
  • 300 Ω: 1000 mW (standard), 1400 mW (hyper)
• Total harmonic distortion + noise (THD+N):
  • Standard: 0.0018% (high gain, 1 kHz, 530 mW, A-weighted)
  • Hyper: 0.0020% (high gain, 1 kHz, 750 mW, A-weighted)
• Signal-to-noise ratio (SNR):
  • Standard: 127 dB (low gain, 32 Ω, A-weighted)
  • Hyper: 130 dB (low gain, 32 Ω, A-weighted)
• Dynamic range:
  • Standard: 128 dB (low gain, 1 kHz, 32 Ω, A-weighted)
  • Hyper: 130 dB (low gain, 1 kHz, 32 Ω, A-weighted)

Unbalanced Outputs

• Output power per channel:
  • 16 Ω: 2600 mW (standard), 3600 mW (hyper)
  • 32 Ω: 1800 mW (standard), 2500 mW (hyper)
  • 64 Ω: 1000 mW (standard), 1460 mW (hyper)
  • 128 Ω: 560 mW (standard), 800 mW (hyper)
  • 300 Ω: 250 mW (standard), 360 mW (hyper)
• Total harmonic distortion + noise (THD+N):
  • Standard: 0.0038% (high gain, 1 kHz, 175 mW, A-weighted)
  • Hyper: 0.0040% (high gain, 1 kHz, 250 mW, A-weighted)
• Signal-to-noise ratio (SNR):
  • Standard: 124 dB (low gain, 32 Ω, A-weighted)
  • Hyper: 127 dB (low gain, 32 Ω, A-weighted)
• Dynamic range:
  • Standard: 125 dB (low gain, 1 kHz, 32 Ω, A-weighted)
  • Hyper: 127 dB (low gain, 1 kHz, 32 Ω, A-weighted)

Physical Characteristics

• Dimensions (W x D x H): 270 x 215 x 70 mm
• Weight: 5 kg
• Power consumption: 75 W