Triode's vacuum tube preamplifier, the TRX-4. Operation confirmed. Used for about an hour every day. There is a scratch on the transformer. Please check the photos. Includes remote control, warranty, power cable (new general-purpose, operation confirmed), and fuses. Comes with side wood panels. Includes four Matsushita 12AX7 tubes (used). I was using these instead of the original tubes. The dealer's name is not written on the warranty. Actually, I accidentally dropped and completely damaged the amplifier I originally purchased. Thanks to the manufacturer's kindness, I repurchased it directly from the manufacturer for a fee. If repair is needed within the warranty period, I believe you can confirm with the manufacturer. This item is fully functional. I am a non-smoker, and I do not have any pets. I will attach the shipping label to the original double box and ship it. I will try to ship as soon as possible, but it may take some time due to the weight. Thank you for your understanding. The following is the manufacturer's description: Following the popular vacuum tube preamplifier "TRX-1," this model retains the convenient and easy-to-use features while changing the rectifier circuit in the power supply section from a rectifier tube to a SiC Schottky barrier diode, which is efficient and has excellent response characteristics, improving the power supply section and reliability. The 4-band equalizer has adjustable frequencies of 150Hz, 400Hz, 2kHz, and 10kHz (±10dB), allowing for correction of room acoustics, adjustment of low-frequency characteristics that tend to be lacking at low volumes, and adjustment to your preferred balance. It comes with a high-quality remote control made of machined aluminum, allowing for volume, mute, input switching, and equalizer ON/OFF operation. It has 3 output systems and can be used for bi-amp driving. Vacuum tubes used: 12AX7 x 4 Frequency response: 10Hz～100KHz (±2dB) S/N ratio: 91dB Input terminals: 5 systems (LINE1～5) Input sensitivity: 250mV Input impedance: 100kΩ Output terminals: 3 systems (OUT1～3) Output impedance: 700Ω Equalizer adjustable frequencies: 150Hz, 400Hz, 2kHz, 10kHz ±10dB Remote control functions: Volume, mute, input switching, equalizer ON/OFF Rated power consumption: 30W Size: Width 340 x Depth 310 x Height 185mm Weight: 10.5kg Accessories: Remote control, vacuum tube bonnet, power cable