Oldchen 845-A Hi-Fi Stereo Tube Amplifier 25Wx2 Class A Singled Ended Amplifier Upgraded Version

Oldchen 845-A Hi-Fi Stereo Tube Amplifier 25Wx2 Class A Singled Ended Amplifier Upgraded Version

Description (Upgraded Version):
845-A high-power Class A amplifier boasts a simple and atmospheric appearance, stable and nice optimized circuit, with better performance.

Electron tubes are upgraded to 6SN7-SE x 2, 300B-SEN x 2, 845SEC x 2 in this version. Its power supply adopts a high-voltage transformer and a low-voltage transformer to supply power independently, ensuring sufficient power and reducing interference. In the absence of output feedback, its noise level is controlled within 1-1.5mV, which makes the sound of the tube amplifier more broad and natural. Metal film resistors, potentiometers for ALPS and imported enthusiast capacitors are used. To reduce noise, signal amplifying part adopts scaffold welding, and power supply part is composed of a thicker circuit board. 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. High-quality Taiwan-made dual VU meters make the whole machine more beautiful.

The direct heating triode tube amplifier expresses the natural and delicate vocals and string music. In the big dynamic, there is also an outstanding performance. The performance in driving speakers is also marvellous.

If your speakers and sound source are very good, and better sound quality of the machine and sound level of the tubes are needed, you can choose this version.

Front Panel:
- A POWER switch
- Two VU meters
- A VOLUME knob
- A INPUT source selection knob

Rear Panel:
- Three sets of input terminals
- Terminals for left and right speakers
- With a fuse cover
- Power supply socket

Performance Parameters (Upgraded Version):
- Output power: 25Wx2 (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
- Size: 430 x 340 x 280mm (WxDxH)
- Electronic tubes: 6SN7-SE x 2, 300B-SEN x 2, 845SEC x 2

Package Included:
- 1 x Set of Tube Amp

Note:
- Products are often improved and updated, and component configurations are subject to change (all of the same grade or better) without notice. Thank you for your understanding!
- Optional Voltages: 110V, 220V, and 240V. Other voltages can be customized.
- It is assembled.