Tube Headphone Amplifier
HPA-KG NARU
$108,000.00
HPA-KG NARU
Features
- Featuring KUROGAKI wood side panels and an Ayasugi-inspired metal mesh protective grille, the unit is stylized to reflect the beauty and power of nature
- The signal amplification stage employs paired JJ ECC83S tubes, known for their rich and resonant sound characteristics
- Two pairs of Takatsuki TA-300B tubes are utilized in the power stage, delivering powerful driving force and dynamic high-quality sound
- Circuit design features Lundahl input and output transformers, the latter constructed with amorphous alloy cores
- Three-position impedance selector switch allows you to choose appropriate impedance based on headphone characteristics and desired sound quality
- Two analog pre-outs (unbalanced RCA and balanced XLR)
- Three analog inputs (unbalanced RCA and two balanced XLR)
- Includes four replacement TA-300B vacuum tubes and a function explanation plate to aid in the use of the amplifier’s front panel dials and switches
- Amplifier complies with the new safety standard IEC 62368
- Included limited-edition AW-KG NARU headphones feature housings crafted from precious KUROGAKI wood
- Includes two detachable fabric-braided headphone cables with A2DC (Audio Designed Detachable Coaxial) connectors at the headphones: a 2.0 m (6.6') cable with gold-plated 4-pin XLR-M balanced connector and a 3.0 m (9.8') cable with 4-pin XLR-M balanced connector
- Additional set of ZMF Universe Hybrid earpads is also included for a unique alternate listening experience
- Japanese craftsmanship: All Audio-Technica wooden headphones are hand-assembled in Tokyo
- Headphones come with a wooden storage box adorned with KUROGAKI wood
Specifications
Headphone Amplifier | |
---|---|
Circuit Configuration | All-tube balanced amplifier |
Headphone Impedance | 32 to 600 ohms |
Maximum Output Level | Pre-output (10%, 1 kHz): Balanced pre-output: 35 dB Line pre-output: 29 dB |
Instantaneous Maximum Output Level | 6.3 mm (1/4”) headphone output (10% 1 kHz): 1600 mW + 1600 mW (32-ohm load) 1300 mW + 1300 mW (150-ohm load) 1000 mW + 1000 mW (600-ohm load) Balanced output (10%, 1 kHz): 1600 mW + 1600 mW (32-ohm load) 1300 mW + 1300 mW (150-ohm load) 1000 mW + 1000 mW (600-ohm load) |
Frequency Response | Headphone output: 10 Hz to 60 kHz (±3 dB) Pre-output: 10 Hz to 90 kHz (±3 dB) |
Total Harmomic Distortion | 0.8% or less (at 10 mW output, 20 Hz to 20 kHz) 0.08% or less (at 10 mW output, 1kHz) |
Gain | 6.3 mm (1/4”) headphone output / balanced output: 15 dB (32-ohm load) 17 dB (150-ohm load) 18 dB (600-ohm load) Pre-output: 18 dB (balanced pre-output) 12 dB (line pre-output) |
Noise | 6.3 mm (1/4”) headphone output / balanced output: -98 dBv or less (A-weighted) |
Separation Between Channels | Single-end output: 68 dB (Load: 32 ohms, 1 kHz) XLR4 balanced output: 100 dB (Load: 32 ohms, 1 kHz |
Analog Input Terminal | RCA jack line input x 1 XLR balanced input × 2 |
Headphone Output Terminal | 6.3 mm (1/4”) stereo headphone output × 1 XLR4 balanced stereo headphone output × 1 |
Input Switching | BAL1: Balanced1 BAL2: Balanced2 LINE: LINE1 |
Output Switching | PRE: Pre-output XLR4: Balanced headphone output HP: 6.3 mm (1/4”) headphone output |
Headphone Impedance Switching | 32: 32 to 80 ohms 150: 80 to 250 ohms 600: 250 to 600 ohms |
Power Input Terminal | IEC Type (Class I) |
Power Supply | 100 V AC, 50/60 Hz;110 V AC, 50/60 Hz; 120 V AC, 50/60 Hz 220 V AC, 50/60 Hz; 230 V AC, 50/60 Hz; 240 V AC, 50/60 Hz 115 W (Switched with jumper wire inside product) |
Power Transformer | EI core transformer × 2 (L/R separated power supply) R core transformer × 1 (for control) |
Vacuum Tube | TA-300B (TAKATSUKI) × 4, ECC83S Gold (JJ-electronic) × 4, GZ34S (JJ-electronic) × 2 |
Audio Output Transformer | LUNDAHL (amorphous core, silver wire) × 4 |
Dimensions | 493.5 mm (19") × 409 mm (16") × 352.5 mm (14") (W × D × H) |
Weight | Approx. 50 kg (110 lbs) |
Accessories Included | Vacuum tube (TA-300B) (replacement) × 4, Function explanation plate |
Notes | For product improvement, the product is subject to modification without notice. |
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