100Wx2 TDA7294 Digital Power Amplifier Board 7294 200W Dual-Channel HiFi Stereo Audio Amplifier Amp Module DIY Sound Mill(Finish Board)

TDA7294 100W+100W Dual-Channel Audio Amplifier Board Power Amplifier Board HIFI Amplifier Module DIY Accessories sound Retrofit
Product selling points:
1. Using amplifier chip, model: TDA7294
2. Products using materials, long service life
3. The product is a loose part, you need to assemble it yourself, very suitable DIY enthusiasts
4. This is a high-fidelity dual-channel amplifier board
5. 200W power products are very stable
Product parameters:
1. Audio input: dual-channel audio input.
2. Audio output: dual-channel 100W + 100W audio output.
3. Circuit principle: 2 way TDA7294 amplification output.
4. Working V: 24-40V
5. Input impedance: 22K OHM Output impedance: 4-8OHM
6. PCB specification: FR4 50X120X1.6MM
TDA7294 dual-channel amplifier board materials list:
Imported amplifier IC TDA7294: 2 PCS
1/4W resistor 22K: 6 PCS
1/4w resistor 680: 2 PCS
1 /4W resistor 10K: 2 PCS
1/4W resistor 30K : 2 PCS
1W resistor 10R : 2PCS
2W resistor 10R: 2PCS
Diode 1N4148:2 PCS
Film capacitor 100NF:4PCS
Film capacitor 10PF:2PCS
Electrolytic capacitor 22UF:6PCS
Electrolytic capacitor 47UF:2PCS
Film capacitor 2.2UF :2PCS (axial coupling capacitor)
Inductor 5UH:2PCS
7.62 socket, 2 bits 3 bits each 1PCS
5.0 socket: 2PCS
Line board double-sided FR4 50X120X1.6MM: 1PCS
Circuit principle introduction.
Dual-channel TDA7294 amplifier , left and right channel symmetrical , a point of grounding, no current sound, no noise, the output double 100W, the circuit has made some improvements.
1. The input port is connected in parallel with a small capacitor of 330P. This practice has two benefits: is to form a low-pass with R1, filter out some unnecessary residual ultra-high frequency, so that the sound is smoother, while also reducing the burden on the amplifier. Second, it can circuit self-excitation.
2. Feedback resistor connected in parallel with a 10PF capacitor, the sound is more transparent.
3. such as Bell network circuit and output inductor to intercep high-frequency self-excitation and compensation of the output.
The above changes, relative to many circuits, with a good power supply, you can basically play 7294 of more than 99%, negative V feedback, stable , replace different feedback capacitors, you can modulate different tones, suitable mill.
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