Cayin iHA-8 Balanced Class A Headphone Amplifier
Discrete Class A headphone amplifier with up to a stunning 9500mW of power
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Fully-balanced discrete Pure A headphone amplification
iHA-8 features a four-channel discrete pure Class A input buffer amplification circuit. Incorporating TI low-noise mono Op-Amp, each channel consists of two Toshiba audio grade JFET connected in parallel with a constant current source.
This design ensures lower noise and lower distortion, as well as a higher current and stronger driving ability.
A pair of Vishay power MOSFET to conduct three-stages large bias current pure Class A amplification. A DC offset voltage servo circuit to maintain a stable output DC offset voltage of 0V.
Built-in adaptive power, gain, and low noise current switching circuits enhance overall performance and deliver an exceptional listening experience.
Hyper Mode for Ultimate Performance
iHA-8 features a special "Hyper Mode" for maximum performance. Pressing the Hyper Mode button makes further adjustments to static operating current and voltage, delivering up to a truly astonishing 9500mW of output power. Class A operation is maintained even in Hyper mode, delivering ultra strong, transparent sounding amplification.
Ultimate Input and Output Flexibility
6.35mm single ended and 4-pin XLR / 4.4mm balanced outputs ensure compatibility with a wide range of headphones. iHA-8 supports both line level and pre-amp input via RCA and XLR connections, meaning that you can use iHA-8 as an integrated headphone amplifier, or as a pure power amplifier with fixed output.
The iHA-8's volume control circuit combines an ALPS potentiometer with a pair of high end 130 step JRC MUSES72320V volume control chips. This hybrid design means that while the volume control is electronic, the final volume adjustment occurs purely in the analog domain, ensuring stable and highly precise volume control.
Cayin i-Series is a suite of three products desktop products designed around optimal audio performance. Choose individual i-Series units for your needs, or combine all 3 for the ultimate high performance, all in-one headphone listening system.
- 4-channel discrete JEFT Class A headamp
- HYPER output mode
- High/low gain control
- XLR-4, 4.4mm and 6.35mm headphone outs
- Pre/line dual input modes
- 70W low inteference Toroidal transformer
- 50,000uF filter capacitors
- High precision electronic volume
General Specifications
| Circuit Design | 4Ch Discrete Mosfet, Pure Class A |
| Special Mode | Hyper Mode |
| Amplifier Modes | Line level input (STD); Pre-Amp input (Pure Power: Amplifier mode) |
| Outputs | Single-Ended: 6.35mm x1, Balanced: 4pin XLR x1, 4.4mm x1 |
| Analog Inputs | Balanced: XLR x2, Single-ended: RCA x2 |
| Volume Control | MUSES72320 stereo e-volume x2, ALPS potentiometer (control knob) |
| Power Supply | Power Supply 75W toroidal transformer |
| Power Management | 50,000uF Nichicon capacitors with ultra-fast recovery rectifier |
| Gain Control |
Low Gain High Gain +12dB |
| Physical Control | Power On/Off, Source, Hyper, Gain, Line/Pre, Volume Knob |
| Weight | ~5kg |
| Dimensions | 270mm x 215mm x 70 mm (LxWxH) |
Headphone Outputs (Balanced)
| Power Rating (mW per channel) | Impedence | 16 Ohms | 32 Ohms | 64 Ohms | 128 Ohms | 300 Ohms | |
| STD | 7000mW | 5400mW | 3600mW | 2100mW | 1000mW | ||
| Hyper | 9500mW | 7700mW | 5000mW | 3000mW | 1400mW | ||
| Frequency Response | 10Hz-80kHz ±0.5dB | ||||||
| THD+N (XLR Input) | STD | 0.0018% (High gain, 1kHz, 530mW, A-weighted) | |||||
| Hyper | 0.0020% (High gain, 1kHz, 750mW, A-weighted) | ||||||
| SNR (XLR Input) | STD | 127dB (Low gain, 32 Ohms, A-weighted) | |||||
| Hyper | 130dB (Low gain, 32 Ohms, A-weighted) | ||||||
| Dynamic range (XLR Input) | STD | 128dB (Low gain, 1kHz, 32 Ohms, A-weighted) | |||||
| Hyper | 130dB (Low gain, 1kHz, 32 Ohms, A-weighted) | ||||||
| Channel seperation | 103dB (1kHz, 32 Ohms, A-weighted) | ||||||
| Output Impedance | 0.4 Ohms | ||||||
Headphone Outputs (Single Ended)
| Power Rating (mW per channel) | Impedence | 16 Ohms | 32 Ohms | 64 Ohms | 128 Ohms | 300 Ohms | |
| STD | 2600mW | 1800mW | 1000mW | 560mW | 250mW | ||
| Hyper | 3600mW | 2500mW | 1450mW | 800mW | 360mW | ||
| Frequency Response | 10Hz-80kHz ±0.5dB | ||||||
| THD+N (XLR Input) | STD | 0.0038% (High gain, 1kHz, 530mW, A-weighted) | |||||
| Hyper | 0.0040% (High gain, 1kHz, 750mW, A-weighted) | ||||||
| SNR (XLR Input) | STD | 124dB (Low gain, 32 Ohms, A-weighted) | |||||
| Hyper | 127dB (Low gain, 32 Ohms, A-weighted) | ||||||
| Dynamic range (XLR Input) | STD | 125dB (Low gain, 1kHz, 32 Ohms, A-weighted) | |||||
| Hyper | 127dB (Low gain, 1kHz, 32 Ohms, A-weighted) | ||||||
| Channel seperation | 68dB (1kHz, 32 Ohms, A-weighted) | ||||||
| Output Impedance | 0.2 Ohms | ||||||
