Audiophile Preamplifier Board High-End Preamp Board Referring to Preamplifier for Accuphase C200V

Audiophile Preamplifier Board High-End Preamp Board Referring to Preamplifier for Accuphase C200V

Description:
Referring to preamp for Accuphase C200V, it boasts pure DC amplifier structure, excellent output and feedback capacitors, without modification and rendering of the sound from coupling into feedback capacitors. It preserves the original flavor and elements of sound sources as much as possible. There is a zero-adjustable midpoint voltage servo circuit on the board, which can ensure that the midpoint voltage of the board is 0mv at all times.

It has been updated to the fifth version. On the basis of the original circuit, quiescent current regulation is added. Additional output heat sinks ensure higher quiescent current.

The heat sink of the power supply part is enlarged again, and heat dissipation holes are added at the same time, the main circuit layout is modified, the tube thermocouple is better, the stability is improved, and the materials are upgraded. The main filter capacitor has been upgraded to electrolytic capacitor for ELNA (made in Thailand). The layout is optimized, the signal-to-noise ratio is further improved, and the sound details are better.

Features:
- The main filter capacitor is upgraded to the original large electrolytic capacitor for Ina
- Original glass passivated rectifier for Philips
- Second-hand tubes are used for output, and other tubes are brand new original tubes. The tube layout of the FET input stage and the voltage amplifier stage is further optimized to make the thermal coupling better, which has certain benefits for the overall stability and the details of the sound
- Further optimize the heat dissipation of the power adjustment tube. Large plum-shaped heat sinks with better heat dissipation capability are used, and the PCB is provided with a heat sink. This can further improve the stability of the circuit and the service life of the power adjustment tube
- The first stage power decoupling uses axial electrolytic capacitor for Philips BC
- The second-stage decoupling uses axial electrolytic capacitors for ROE
- Heat sink added to the output stage can further increase the quiescent current of the board and make the sound better
- The whole board uses audiophile resistors: for KOA, Philips, DALE, VISHAY and Panasonic
- Imported BI adjustable potentiometer
- Imported audiophile capacitors are adopted, such as for RIFA, WIMA, AVX, KENWOOD, ELNA, Philips BC and ROE
- The board is of the new one, version 5

Specifications:
- Item name: C200V preamp
- Frequency response: 20Hz-22KHz
- Power supply: dual AC 15-20V dual transformers
- Power consumption: Mono 10W
- Distortion: 0.005
- Plate thickness: 2mm
- Signal-to-noise ratio: 104dB
- Magnification: 5 times
- Finished board size: 225 x 174 x 40mm/8.9 x 6.9 x 1.6"
- The highest point of the board: 37mm/1.5"
- Can be split into 225 x 40mm/8.9 x 1.6" two independent channels

Package Included:
- 1 x Board
- 1 x User Manual
- 1 x Set of Copper Pillars