Amplifiers
R300 Plus Series
Integrated Vacuum Tube Power Amplifier
This R300 Plus series uses two 300B vacuum tubes for Class A single-ended power amplification, accompanied by one TUNG-SOL 6SL7 and two 6SN7 vacuum tubes for signal amplification and driving. It employs two 5AR4 vacuum tubes for full-wave rectification, achieving an output power 8W per channel.
This R300 Plus series uses two 300B vacuum tubes for Class A single-ended power amplification, accompanied by one TUNG-SOL 6SL7 and two 6SN7 tubes for signal amplification and driving. It employs two 5AR4 tubes for full-wave rectification, achieving an output power 8W per channel. Additionally, this series features handcrafted point-to-point wiring, a body and transformer cover finished with high-grade piano lacquer, a headphone output function, an external, independent BIAS ADJ current monitoring meter, a 30-second silent delay function, headphone output capability, ALPS motorized potentiometers, and pure post-stage input functionality, allowing for independent pre-stage signal input.
The body is made from aviation-grade aluminum alloy with piano paint.
The external independent BIAS ADJ current display meter and current adjustment points.
High-grade ALPS motorized potentiometers made in Japan.
CNC-machined copper terminals plated with gold are aimed at further noise reduction and upgrades.
Details
Features of R300 Plus Series
Aluminum
The body is made from aviation-grade aluminum alloy.
Manual Soldering
We employ artisanal hand-soldering techniques to solder each component manually.
30s Mute Delay
The high-voltage mute delay can effectively protect the vacuum tubes.
ALPS
We use high-grade ALPS potentiometers that are made in Japan.
BIAS ADJ
The high-end external, independent BIAS ADJ current display meter.
Power Amp Mode
We have added a power amp function to this series, allowing you to use your preamp.
Details
Sound of R300 Plus Series
Classical
This series has made every effort to restore classical music instruments, live performance ambiance, and vocal nuances.
Pop / Contemporary
This series has made the greatest effort to achieve the mid-frequencies and high-frequency vocals needed for pop music.
Symphonic / Live
This series makes the utmost effort to reproduce the soundstage and more wider dynamic range of live music faithfully.
Details
Vacuum Tube of R300 Plus Series
We use only high-quality vacuum tubes for our products!
This series utilizes two specially customized 5AR4 vacuum tubes for full-wave vacuum tube rectification in the high-voltage section; the pre-stage employs one TUNG-SOL 6SL7 vacuum tube for amplification and one Soviet 6SN7 vacuum tube as the driver; and the power amp uses two of our specially customized 300B vacuum tubes for Class A power amplification. Every component is meticulously hand-wired and soldered, offering effective isolation and shielding, and the body is finished with piano lacquer. This way, perfection is more fully achieved.
Specifications
| Titles | Details |
| Output Power | 8W + 8W |
| Harmonic Distortion | 1% (1kHz) |
| Frequency Response | 15Hz ~ 45kHz (-3dB) |
| Input Sensitivity | 210mV (Integrated Mode) 620mV (Power Amp Mode) |
| Input Impedance | 100KΩ |
| Output Impedance | 4Ω, 8Ω, 16Ω |
| Signal to Noise | 90dB |
| VACUUM TUBE | 300B*2, 5AR4*2, 6SN7*2, 6SL7*1 |
| Power | 280W |
| Unit Weight | 50.71lbs (23KG) |
| Gross Weight | 59.53lbs (27KG) |
| Unit Dimensions | 15.95"W * 7.89"H * 13.98"D (405mm W * 200mm H * 355mm D) |
| Voltage Options | Japan - 100V North America - 120V Europe/Asia/Australia/New Zealand - 230V |
| Working Temperature | 32°F to 104°F (0°C to 40°C) |
| Working Humidity | 20% to 80% |
| Temperature | -4°F to 158°F (-20°C to 80°C) |
| Humidity | 20% to 90% |
Gallery
Video of Our Products
Gallery
Photos of Our Products
