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[★ Stars Review] https://starspickeraudio.net/blogs/blog/cayin-ha-300-mk2-irresistible-sound

Cayin HA-300 MK2 (2022) Direct Heated Triode Vacuum Tube Headphone Amplifier

The Star is Reborn
Work hard and dig deep with 20 years of impeccable track record.
Pushing the envelop of tube amplification to deliver practicality, performance and refinement.

Tube Amplifier Holy Grail
The Pursuit of Direct Heated Triode (DHT)
DHT refers to triode tubes that use the cathode as the filament and will heat up the cathode directly.
Minimal approach, offers stellar dynamic, transient and transparent, extremely well-received by audiophiles.
A challenge for headphone applications. Low tolerance to shock and vibration, sensitive to hum/interference.

The Irresistible 300B
The 300B is the most renowned and sought after DHT because of its dreamy tonal characteristic.
HA-300MK2 uses a matched pair of Gold Lion Genelex PX300B low-noise audio triode as power output tubes.
- Endure and passed the toughest tests for reliability
- Natural, sensible and realistic sound signature
- Impressive frequency extension

Premium Vacuum Tubes
Driver Tubes: Tung-Sol 6SN7GTB (Matched Pair)
Output Tubes: Genalex PX300B (Matched Pair)
Rectifier: NOS RCA 22DE4 x4

- 2-Boxes Design
- New Old Stock (NOS) Rectifier Tubes
- Power Supply Transformer
- Impedance Matched Headphone Output
- Carefully Optimized Headphone Outputs
- Powerful and Effortless

Specifications:

[Overview]

Input Connectors: XLR x2, RCA x2
Tubes: Genalex PX300B x2 (output), TUNG-SOL 6SN7GTB x2 (driver), RCA 22DE4 x4 (rectifier)
Dimensions (Amplifier): 286mm x 368mm x 210mm
Dimensions (Power Supply): 150mm x 345mm x 210mm
Weight (Amplifier): 19kg
Weight (Power Supply): 10kg
Fuse: ~220V-240V: T1.6AL250V
Output Tube Fuse: T100mAE250V
Power Consumption: 185W
Working Condition Temperature: 0 to 40 Celsius; Humidity: 20% to 80%
Storage Condition Temperature: -20 to 70 Celsius; Humidity: 20% to 90%

[Headphone Output]

Rated Output (per channel)

4pin XLR (BAL): 2000mW (L); 2400mW (M); 6000mW (H)
4.4mm (BAL): 1400mW (L); 2200mW (M); 5400mW (H)
3.5mm (SE): 1200mW (L): 2200mW (M); 5000mW (H)
Frequency Range: 10Hz to 45kHz (+/- 3dB)
TH+D: 1% (1kHz)
Sensitivity: 200mV to 650mW
S/N Ratio: 100dB (A-weighted)
Headphone Impedance: L: 8-64ohms; M: 65-250ohms; L: 251-600ohms
Headphone Connectors: 4-pin XLR x1, 4.4mm x1, 6.35mm x1

[Speaker Output]

Rated Output: 8W + 8W
Frequency Range: 10Hz-40kHz +/-3dB
TH+D: 1% (1kHz)
S/N Ratio: 95dB (A-weighted)
Input Sensitivity: 400mV
Output Impedance: 4-8ohms
Input Impedance: 50k ohms