1pc Earmax Pro -EMP-Tube-Headphone Amplifier Finished Board

Description: 1pc Earmax Pro -EMP-Tube-Headphone Amplifier Finished Board Note: We also provide the kit bulk board, welcome to ask us the price, if you need the bulk model, you can directly leave a message on the order and shoot the finished board, we will refund you the extra money charged, thank you for your trust and support ~! Tech highlights：Compared with the commonly reproduction of EMP, we improved: 1、High Voltage：Two-stage buck regulator filter, Two low-pass filter (with a corner frequency of 1.6Hz&16Hz) prevents power noise from being introduced into the amplifier. Provide purer power supply (close to battery).2、The high-voltage power supply uses MOSFET as pass transistors, which have a sense of tube sound characteristics but rejecting the rectification and regulation noise.3、high-voltage soft-start feature is included which will take about 5 second to reach the designed voltage protecting the tube from any voltage shock.4、Using parallel AC heater power supply, the voltage distribution is more accurate, better than the original deign which is series voltage regulator.5、all-in-one design, single-point grounding, ground resistance is close to the 0.02 ohm resistance value, low noisedesign.6、PCB is Small with double-sided smt.7、The triangular tube layout reduces the number of dual-channel common tubes, further improves the separation and reduces crosstalk.8、More cost-effective sound modification plan. PCB SIZE: 102X152X1.6mmPower requirements:heater volt: AC 6.3V,I≥1.2A Best:6.3VAC@2Ahigh volt:AC100~260V,I≥0.04Abest:120VAC@0.1A Product configuration：1pc Earmax Pro -EMP-Tube-Headphone Amplifier Finished Board Based on the well-tested board on the standard version kit, we verified all key points' voltage, and used the signal generator and oscilloscope for analog waveform double verification. We will not use this board for listening test.Schematic & key point of debuggingPCB comes with component parameters for easy installation.We only refer the schematic of the amplification part of the circuit. If you need full circuit parameter, please read the component value with the PCB by yourself; we do not provide additionally.please keep test point voltage close enough to it, +-20% is also permitted

Price: 32.77 USD

Location: wuhan

End Time: 2024-03-06T04:47:08.000Z

Shipping Cost: 0 USD