Picture loud check the group of speakers amplifier audio line is not through the attention of the dual line can be interoperable audio line with a multimeter resistor (RX one) two pens touch (branch press branch break collision) speaker junction stake speaker should be louder khakka sound speaker speakers with the ability to sound interchangeable comparisons (the first multimeter measurement to prevent damage to the amplifier bad stroboscopic) speaker can be sounded amplifier group parts loss