Interchangeable cartridge audio preamplifier for microphone, and kit comprising the same

An audio preamplifier for microphone, wherein the audio preamplifier comprises:

• a chassis in which a first electronic module is arranged, the chassis comprising at least one audio input and at least one audio output which are connected to the first electronic module, a control panel comprising a gain selector being arranged on one side of the chassis and connected to the first electronic module, the chassis further comprising a receiving compartment inside which is arranged a first connector connected to the first electronic module, the control panel having an opening from which the receiving compartment emerges;
• and
• a cartridge in which is arranged a second electronic module comprising a preamplification circuit and a gain control circuit, the cartridge further having a second connector which is complementary to the first connector, the second connector being connected to the second electronic module, the cartridge being configured for being inserted in a removable manner into the receiving compartment of the chassis via the opening of the control panel so as to connect the first and second connectors to each other;
• wherein, when the cartridge is inserted into the receiving compartment of the chassis and the first and second connectors are connected together, the first electronic module is configured for transmitting an input audio signal, from the at least one audio input, to the preamplification circuit of the cartridge and a gain selection signal, from the gain selector, to the gain control circuit of the cartridge, the gain control circuit is configured for adjusting the gain of the preamplification circuit based on the gain selection signal, and the preamplification circuit is configured for preamplifying the input audio signal into a preamplified audio signal and transmitting the preamplified audio signal to the first electronic module which is configured for then transmitting the preamplified audio signal to the at least one audio output.