Package : Yes
Channels : 2 (2.0)
Maximum Power Per Channel : 101-130W
Brand Name : occkic
Origin : Mainland China
Certification : CE
Product selling points:
1. Using high-quality amplifier chip, model: TDA7294
2. Products using high-quality materials, long life
3. The product is a loose part, you need to assemble it yourself, very suitable for DIY enthusiasts
4. This is a high-fidelity dual-channel amplifier board
5. 200W power products are very stable performance
Product parameters:
1. Audio signal input: dual-channel audio signal input.
2. Audio output: dual-channel 100W + 100W audio output.
3. Circuit principle: 2 way TDA7294 amplification output.
4. Working voltage: DC 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 original 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 design, left and right channel symmetrical design, 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: one 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 eliminate 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 prevent 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 performance of more than 99%, negative voltage feedback, stable performance, replace different feedback capacitors, you can modulate different tones, suitable for mill.
Shipping list:
Package A: DIY loose parts X1
Package B: finished module X1
label:yes
No-delivery refund
