The combined amplifier has the following characteristics
1. The pre signal amplification and the post amplifier amplification are placed in one cabinet. Users only need to connect the external sound source and the speaker to make it sound, which is convenient to use;
2. The combined amplifier is a multi-functional integrated amplifier with the control functions of multiple sound source input selection, volume and tone;
3. The front and back stage amplifiers are designed to put the front small signal amplifier and the back stage power amplifier in different chassis respectively, and connect them through special connecting lines outside. The front and back stage amplifiers can not be used independently, but can only be used together;
4. The structure, distribution and material consumption of the front and rear stage split amplifier are more reasonable. Because the front and rear stages have their own independent chassis, power supply and control system, the mutual interference can be minimized, and the grade is higher than that of the combined amplifier, and the price may be much higher.
