Description / Cayin HA-3A Vacuum Tube Headphone Amplifier
Cayin HA-3A
A transformer-coupled, balanced vacuum tube headphone amplifier designed for both performance and style. Featuring 4-Pin XLR, 4.4 mm, and 6.35 mm outputs in a compact A4-sized chassis, it offers selectable Low, Mid, and High impedance for optimal headphone matching.
Premium Tube Design
Uses hand-matched Electro-Harmonix 6V6EH GT driver tubes and RCA 25AX4GT rectifier tubes, delivering pure, natural sound through a single-ended vacuum tube circuit with transformer-coupled outputs.
Precision Engineering
Custom-wound output transformers ensure powerful, low-noise performance. Balanced outputs have separate left/right grounds for improved stereo separation, while point-to-point gold-plated wiring preserves signal integrity.
High-Quality Components
Equipped with an ALPS volume potentiometer, stainless-steel and aluminium construction, large anti-vibration foot pads, and comprehensive circuit protection with a 60-second start-up delay.
Connectivity & Versatility
Offers RCA and XLR inputs, multiple headphone outputs, and an impedance-matching switch to suit a wide range of headphones.
Features
- Transformer-coupled, balanced-driven single-ended tube design
- Outputs: 4-pin XLR (balanced), 4.4 mm (balanced), 6.35 mm (single‑ended)
- Three impedance-matched settings: Low (8–64 Ω), Mid (65–250 Ω), High (251–600 Ω)
- Inputs: Balanced XLR and single‑ended RCA
- Point‑to‑point internal wiring, in‑house designed power/output transformers
- ALPS 50KA×2 dual potentiometer, anti‑interference/shock design, aluminum foot pads
Specifications
| Specifications | |
|---|---|
| Input Connector | XLR × 2, RCA × 2 |
| Tube – Output | Electro Harmonix 6V6GT × 2 |
| Tube – Driver | JJ 12AU7 / ECC82 × 2 |
| Tube – Rectifier | RCA 25AX4GT × 1 |
| Dimension | 306 mm × 260 mm × 170 mm |
| Net Weight | 12 kg |
| Fuse | ~220V–240V: T1 AL250V ~100V–120V: T2AL250V |
| Output Tube Fuse | T1 25mAE250V |
| Power Consumption | 80 W |
| Working Condition | Temp: 0°C ~ 40°C; Humidity: 20% – 80% |
| Storage Condition | Temp: -20°C ~ 70°C; Humidity: 20% – 90% |
| Headphone Output | |
|---|---|
| Rated Output* |
4-Pin XLR (BAL): 600 mW (L); 750 mW (M); 850 mW (H) 4.4 mm (BAL): 230 mW (L); 350 mW (M); 400 mW (H) 6.35 mm (SE): 400 mW (L); 600 mW (M); 700 mW (H) |
| Frequency Range | 18 Hz ~ 30 kHz ± 3 dB |
| THD + N | 0.2% (1 kHz, 200 mW) |
| Sensitivity | 300 mV ~ 480 mV |
| S/N Ratio | 100 dB (A-Weighted) |
| Headphone Impedance | L: 8–64 Ω; M: 65–250 Ω; H: 251–600 Ω |
| Headphone Connector | 4-Pin XLR × 1, 4.4 mm × 1, 6.35 mm × 1 |