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DIY Class A 6J5 HIFI Headphone Amplifier Vacuum Tube Preamplifier Kit

DIY Class A 6J5 HIFI Headphone Amplifier Vacuum Tube Preamplifier Kit


Size: 77mm * 75mm (L*W)
Weight: 79g
Frequency: 16 HZ – 28.5KHZ
Headphone impedance: 16-600Ω
SNR: > 108db
Channel separation: <-100db
Distortion: <0.003% (distortion noise but not all, of the second harmonic modified sound)
Input and output: standard 3.5mm headphone jack
NE5532 or MC33078 op-amp
6J5 low voltage power supply pre-made cushion, the sound is very warm.
Power supply requirement: ±12-15V DC power supply 10W above transformer, filament require 12V more than 2A
Default op amp NE5532 or MC33078 random delivery.

Package includes:

1 x Headphone Amplifier DIY Kits


This is DIY Kit need you solder it by yourself, and many component is very small,so need you have some DIY ability, the unsuccessful DIY making is beyond the scope of our warranty.
We do not supply you with a manual, please note before buying.

DIY 100W HIFI-Class Mono Amplifier Board Kit


1. Audio input: Mono audio signal input;
2. Audio output: Mono 100W audio output;
3. Operating voltage: DC ± 35V ±10%;
4. Input impedance: 39K OHM
5.Output impedance: 2-8 OHM
6.PCB size: double-sided FR4, 50x90x1.6MM

Package included:

1 x Amplifier Kit

100W Audio Amplifier Kit - note Mono only, buy two for stereo

TDA8950 2x170W Digital Subwoofer Class D Audio Amplifier Board AMP Module


This version can choose differential input, the effect is more good, need is equilibrium output level before to pick up.
The board with rectifier filter circuit, save yourself the trouble collocation rectifier filter, using 30 a new original rectifier bridge with South Korea.
Sanhe high-speed electrolytic arrays, the effect is very good.
Bring their own trumpet protection circuit, installed substitution of DIY is more convenient.
Can be convenient for BTL output, need very strong beginning ability, if you don’t have a real master, please don’t try this kind of connection.
Reserve a plus or minus 15 v voltage potential position on board, convenient DIY ability strong buyers with myself, can give the front-end power supply.
Adopts SMT process, more stable than hand soldering product.
Match: the amplifier board can be used directly as pure power amplifier You just need to plug in transformer, also can be used with tones ,or made subwoofer amplifier with low pass board, price is very high.


Name: TDA8950 Amplifier Board
Size:10 x 10 (cm) (Excluding potentiometer handle and other bulge)
Work: Class D
Efficiency: 90%
Rated output power: 2 x 170W
Operating voltage: AC16-28V
Maximum output: OCL = 170Wx2 BTL = 300Wx1

Package includes:

1 x TDA8950 Amplifier Board
1 x 3PIN Line

AC20V-28V LM3886+NE5532 68W+68W 4-8 Ohm Amp Power Amplifier Board

This is a Stereo 68W*2 LM3886+NE5532 Amplifier Assemble Board. Use 2pcs of LM3886&NE5532 and 2 X 10000 UF NOVER audio-specific capacitors, you can control bass treble and volume adjustment.

1. Supply voltage: AC dual 20V-28V, recommend use above two 26V / 150W
2. Output Power: 68W * 2
3. Speaker Impedance: 4-8 Ohm
4. Potentiometer center spacing: 25mm
5. Dimension: 15*9.3*5cm
Package included:
1 x LM3886+NE5532 68W+68W Power Amplifier Board

LM3886 with NE5532 Preamplifier
John Linsley Hood PNP Class A (note schematic incorrect - uses NPN driver)

DIY PNP Version 6 Transistor Hood 1969 A-Class Power Amplifier


1 set includes 2 boards, mirror design
– Transformer voltage range: AC12V to AC28V / DC18V to DC36V, 2 lines
– PCB size: 139MMX73MM
– 6 transistor design, 2 transistors are used to buffer filter

Click to download diagram  (Note that schematic is incorrect – the driver stage is an NPN: 2N3055)

Package included:

1 x Amplifier Kit

Board Kit

DIY TDA7293 2.0 100W+100W Dual Channel Digital Amplifier Board Kit


PCB size: 100X60MM
Voltage: AC 15-32V X2
Impedance range: 4-8 ohms
Distortion: <0.05%
Power: rated 100WX2

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