Nowadays, there are many types of amplifiers, digital and analog. Depending on the type of application, a choice is made on digital or analog processing. Digital amplifiers today show great success in portable speakers, mobile phones, laptops because they have greater efficiency, which is of great importance in such an application. In addition, with the development of digital technology, the quality of audio signal processing has become much higher quality and their sound has become appreciated. For the needs of guitar amplifiers, the application is still in the field of analog electronics due to the required color and warmth of sound. Therefore, it is very likely that analog amplifiers, despite their poorer efficiency will never lose their place in sound amplification precisely because of the properties they add in the amplification process. Through the paper, the reader will get basic information about guitar amplifiers, general technical requirements for the amplifier and basic knowledge about the operation of electronic filters in application on amplifiers. Also, the reader will get an insight into the design and practical construction of amplifiers with LM1875T integrated circuit, the use of software tools needed for circuit simulations, design and physical production of printed circuit boards, and the use of software tools needed to guide the CNC machine. In addition, the topic of cooling and power supply for the designed amplifier circuit is covered in a basic way.