AIYIMA A5 PRO Headphone Amplifier USB DAC 24BIT 192KHz HIFI Decoder Audio Interface Digital Optical Coaxial PC USB Converter
133.64 100.23 $
Note: this is DIY kits ! Not finished board. Need you DIY it .
Power supply voltage: Dual AC 18V (the max voltage Canrsquot exceed Dual AC 19V, no less than 18v, otherwise the tube not bright, the sound distortion. If you need to use AC 12v, need to modify the filament buck resistor 2.2 ohm, then output power will be slightly lower)
Headphones Amp/Pre-Amp output: magnification about 0.8times
LM1875T amplifier output power: typical 20W (Max 30W)
Speaker impedance: 4Omega-8Omega
Total harmonic distortion: <0.04%
Frequency response: 14Hz-100kHz
This product uses 6j1 tube for pre-level lm1875 amplifier, with headphones function. the sound more sweet, soft. Better listen than lm3886, tda7294 .
music fax X-10D circuit principle design, and optimize reasonable on it, more stable than the original machine performance, the tube to play increased by 10%.
This machine uses Dual AC 18V input, enjoy yourself in the low power supply.
Power Working principle: turn on power supply, tube filament begin heat, then boost from the zero voltage begin to boost, when tube filament hot, the boost is just boost finished, so this is the same with the bile rectification, 4pcs 470UF capacitor filter is very clean, excellent power supply system wonrsquot noise, DC 12V power supply the filament, need the two tube filament is in series, the use of DC filament is also to reduce noise.
Headphones amplifier/ Pre-amp output function: 6j1 tube pre output signal can also drive headphones, but slightly smaller than the digital audio sounds.
you will got as shown following first picture !
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|Location||*Estimated Shipping Time|
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