Description
Oldchen 845-A Hi-Fi Stereo Tube Amplifier 25Wx2 Class A Singled Ended Amplifier
Description (Standard Version):
845-A high-power Class A amplifier boasts a simple and atmospheric appearance, stable and nice optimized circuit, with better performance.
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. It uses 6SN7 (6H8C) preamp tubes, PSVANE 300B-SE promoting PSVANE 845 high-power bile tubes to drive output transformer, and high-efficiency and stable enthusiast capacitor coupling is used between 300B-SE and 845. 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 our upgraded version of 845-A series.
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 (Standard 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: Shuguang 6SN7 (Soviet 6H8C) x 2, PSVANE 300B-SE x 2, PSVANE 845 x 2
Description (Standard Version):
845-A high-power Class A amplifier boasts a simple and atmospheric appearance, stable and nice optimized circuit, with better performance.
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. It uses 6SN7 (6H8C) preamp tubes, PSVANE 300B-SE promoting PSVANE 845 high-power bile tubes to drive output transformer, and high-efficiency and stable enthusiast capacitor coupling is used between 300B-SE and 845. 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 our upgraded version of 845-A series.
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 (Standard 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: Shuguang 6SN7 (Soviet 6H8C) x 2, PSVANE 300B-SE x 2, PSVANE 845 x 2
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.
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
- 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.
- 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.
Payment Terms
1.We accept PayPal only.
2.All major credit cards are accepted through secure payment processor PayPal.
3.Payment must be received within 7 business days of auction closing.
4.We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay.
2.All major credit cards are accepted through secure payment processor PayPal.
3.Payment must be received within 7 business days of auction closing.
4.We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay.
Shipping Terms
-
For remote regions, we will charge your extra shipping costs. Usually
it cost about 35USD-50USD. We will contact you after your payment.
Thanks for your understanding.
Return Terms
1.
If you receive defective item, please kindly notify us within 14 days.
We will guide you the returning instruction for replacement or refund.
2. If you purchased in improper condition, please NOTE that the sipping and handling fee will not be refund, all return shipping fee should paid by the buyer unless item DOA.
3. We reserve the right to refuse any returns for objective reasons.
2. If you purchased in improper condition, please NOTE that the sipping and handling fee will not be refund, all return shipping fee should paid by the buyer unless item DOA.
3. We reserve the right to refuse any returns for objective reasons.
Custom Duties & Taxes
1.
Import duties, taxes, and charges are not included in the item price or
postage cost. These charges are the buyer's responsibility.
2. Avoiding some unnecessary trouble, please check with your country's customs office to inform us what we should declare its value before shipping.
2. Avoiding some unnecessary trouble, please check with your country's customs office to inform us what we should declare its value before shipping.
Feedback
1.
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us neutral or negative feedback. We work hard to make sure EVERY
CUSTOMER 100% SATISFIED and resolve any problem for you and always leave
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2. If you are satisfied with the product you received, please kindly leave us a positive feedback and 5 star DSR. If there is any problem of your order, please feel free to contact us firstly, we are responsible and credible seller, will follow it for you asap.
2. If you are satisfied with the product you received, please kindly leave us a positive feedback and 5 star DSR. If there is any problem of your order, please feel free to contact us firstly, we are responsible and credible seller, will follow it for you asap.
On Apr-23-21 at 00:29:20 PDT, seller added the following information: