Small Problem In Sound Installation

Hello friends. I have a problem with my audio installation in my car. For example, when the sound level of the radio is 25 and below, the sound comes only from the columns on the left side, when I increase the level, I can get sound from the entire installation. Sometimes, when I press the clutch, the same problem occurs and the sound on the right side stops. Could there be a wiring error?

Do I have an amplifier direct door speaker

Is there a [QUOTE = GökhaN] amp direct door speaker [/ QUOTE]