LM1875 45W * 2 level amplifier board gaincard high power low distortion with radiator party decoration amplifier
Product introduction:
1: The gaincard version is a very good sounding LM1875 circuit that has been optimized through repeated comparison and verification abroad. The wide frequency band is beautiful and durable, and the midpoint is very stable. If you have not played with LM1875, you can buy it to try. If you buy LM1875, you can buy it to upgrade. The principle is that the voltage at the two input terminals of the inverter amplifier circuit is always 0, which does not change with the input signal. The input voltage of the transistor (FET) at the input terminal of the amplifier is constant, and the bias state is always maintained at the appropriate working point.
2: The kit needs to be welded by yourself. Please choose the parts or finished board according to your DIY ability. The default main capacitor of this kit is the original UK nover 10000UF 35V, and the sound is more durable than Japanese and Nikon chemical capacitors.
3: Generally, the output of a single LM8175 is 4A current. The official indicator is that the drive sensitivity is low. It is useless to use BTL for speakers with large appetites. The driving force will not be enough. The drive current can be doubled to 16A by using a 4-link output. In this way, the sound field is better, the medium and low frequencies are full, and the power is also improved.
4: One channel is output by four LM1875 chips. The static current is 4 times higher than a single chip. The current of the whole board is about 0.5A. The sound is pure class A at low and medium volume. The sound is more delicate, natural, full and comfortable than the 1969 class A. At the same time, it can be achieved without tedious debugging.
Product Features:
- Good sound CG circuit architecture is adopted, the sound is exquisite and durable, the center point is stable at 4 and X2 small class output.
- 40000uF large capacity filter, excellent low frequency diving
- Use double-sided gold-plated military PCB, which has good conductivity and is not easy to oxidize.
- Red copper pentoxide inductor is added to the output to eliminate noise, making the sound quality purer and more natural.
- Omron protects the circuit which is more reliable.
- Full advanced component configuration
Parameters:
Power supply range: AC12-AC22 * 2
Output power: 45w-8Ω 60W 4Ω (5W under pure class A)
Impedance range: 1-8Ω
Frequency response: 10Hz-40Hz
Radiator size: 200*40*62mm
