ID: 1252

AIYIMA 6J1 Tube Preamplifier Audio Board LM1875T Power Amplifier Board 30W Preamp Bile Buffer Headphones Amplifier AMP DIY Kits

4.8 (8 votes) | 38 orders
Price: US $34.79 / piece
Discount Price:
US $ 28.57 / piece

Note: this is DIY kits ! Not finished board. Need you DIY it .

Performance parameters:

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%

SNR: 105dB

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 !

  • Package: Yes
  • Channels: 2 (2.0)
  • Model Number: 6J1 Preamp
  • Maximum Power Per Channel: NO POWER
  • Brand Name: Aiyima
  • Certification: NONE
  • Origin: Mainland China


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Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

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Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
*This doesn’t include our 2-5 day processing time.

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For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

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