Product Details:
This preamp boar using beijing 6J1 tube, classic transistor amplifier circuit, work in class A, more easily to mach with the power amplifier, almost any amplifier line can be satisfied with the results. Very suitable for subwoofer, audio conversion or assembly The circuit design is reasonable, low noise, boot impact is small, is a high-quality entry-level pre-amplifier tube circuit. Use it in digital audio sources such as CD / VCD / DVD / MP3 / IPHONE / iPad / MID / millet / Smartphone / CD-ROM and other digital audio and amplifier between the kind of long time listening to the annoying " And "transistor sound" flew away, the entire listening system will appear a sweet and delicate "tube taste". On-board with volume control potentiometer, audio input and output interfaces, easy to use, the bottom of the tube is equipped with orange LED, work orange light issued, very charming. .
Specifications:
Size: 251 * 83mm (Single board)
Works voltage: 0-AC200V above 10ma (200V-240V is ok) 0-AC6.3V above 500ma (6V-9V is ok)
PCB size: 127mm*76mm Tube heigh about 64mm with Copper pillar dimensions
Gain: about 10 times
Frequency response:20Hz ~ 20KHz
Input Sensitivity:300mV-2000mV
SNR:96DB
Total harmonic distortion <=3% (1KHz)
Package List:
1 × PRT-01A 6J1 Vacuum Tubes Preamp PCB/Kit/finished board（According to your choice）
