Willsenton R800i 300B 845 Tube Single-Ended Class A Integrated & Power Amplifier Balanced XLR Input

Features

• R800i Hand welding point to point, the main circuit adopts shed welding
• Two high-end EI type single-ended output transformers with high-end special technology and high-quality broadband response made of Z11 iron core.High-voltage power supply and filament power supply independently use high-efficiency toroidal, high-power power transformers with Z11 cores and special materials.
• Power-on high-voltage delay and mute delay function (about 30 seconds),Use Japanese ALPS high-end potentiometer
• The 845 tubes can NOT work on a 805 R-800i amplifier, the 805 tubes can NOT work on a 845 R-800i amplifier. They are completely different amplifiers.
• What is difference between 845 and 805 tubes? Usually, the 845 tubes have a smooth sound, it is good at human voice, very nice sound, but the power is not too high, so, 845 fits the speakers are high efficiency. 805 tubes have a high power, so, it work well with most of speakers(but please don't use 805 at a pair of very high efficiency speakers), and 805 is good at large dynamic musics like Symphony, jazz.

Description

R800i 845 Features: Hand welding point to point, the main circuit adopts shed welding Two high-end EI type single-ended output transformers with high-end special technology and high-quality broadband response made of Z11 iron core. High-voltage power supply and filament power supply independently use high- efficiency toroidal, high-power power transformers with Z11 cores and special materials. The front stage uses one 12AX7 and two 6SN7 vacuum tubes; the driving part uses two 300B tubes to amplify the rear stage. The front stage uses a 5U4G for rectification The rear stage uses two 845 vacuum tubes for class A single-ended power amplification. Five groups of signal input A, B, C, (D) BALANCE, E (PREIN) This machine is specially equipped with balanced input function and pure rear stage function Power-on high-voltage delay and mute delay function (about 30 seconds) Infrared function remote control Use Japanese ALPS high-end potentiometer Easy-to-install plug-in vacuum tube shield Peripheral power tube bias current adjustment function and power output level meter sensitivity switch Product parameters: Rated output power: 23W + 23W (RMS) Machine frequency response: 12Hz ~ 35kHz (-1.5dB) Input sensitivity:845 = 300mV Balance input: 280mV pure power stage: 1800mV Input impedance: 100KΩ Output impedance: 4Ω, 8Ω, 16Ω Harmonic distortion: 1% (1kHz) Signal to noise ratio: 90dB Left and right output balance: <0.5dB Power consumption: 380W Vacuum tube: 12AX7 (ECC83s Brand JJ)x 1, 6SN7 x2, 274B x1, 300B x2, 805 x2 Machine volume: (440 410 275) mm Net weight: 42kg Gross weight: 48kg Power supply voltage: AC 100V to 240V 60Hz/50Hz (there is a 230V/115V voltage change-over switch inside of body)

Product Dimensions: 17.32 x 16.14 x 10.83 inches

Item Weight: 105.6 pounds

Manufacturer: Willsenton

Item model number: Willsenton R-800i-300B-845 amp

Date First Available: March 14, 2020