The whole machine is powered by a high-voltage transformer and a low-voltage transformer independently to ensure sufficient power while reducing interference. In the absence of output feedback, the noise floor is controlled within 1-1.5 millivolts, which makes the sound of the tube amplifier better. The hair is broad and natural. Using 6SN7 (6H8C) pre-amplifier, Noble Voice 300B-SE promotes Noble Voice 845 high-power bile duct to drive output transformer, and high-efficiency and stable fever capacitive coupling is used between 300B and 845. Using metal film resistors, imported ALPS potentiometers and imported fever capacitors, the signal amplifying part adopts scaffold welding in order to reduce noise, and the power supply part is composed of thicker circuit boards. The high voltage and the sub-high voltage each use an inductance filter with a delay of 30 seconds, which effectively protects the service life of the power tube. The high-quality Taiwan-made dual-head dynamic indicator makes the whole machine more beautiful and atmospheric,

The direct heating triode 845 tube amplifier can not only express the natural and delicate vocals and string music, but also can be calm and majestic in the big dynamic, even if the box is difficult to push can also perform well.

Performance parameters:

●Output power: 25W×2(RMS 8Ω)
●Frequency response: 18Hz--35kHz
●Total harmonic distortion: <1% (1kHz)
●Input sensitivity: 500mV--2000mV
●Input impedance: 100kΩ
●Output impedance: 4Ω, 8Ω
●Signal to noise ratio: 89dB
●Volume (W×D×H): 430(W)×340(D)×280(H)mm
●Package weight: 30kg