Yo
j'ai trouvé enfin une explication d'impédance pour les nuls (comme moi) :
Speaker Wiring Info
Series Wiring - For speakers in series you add the impedances of the speakers together. To determine the wattage you add the wattage of the speakers together.
If you were using (2) 8 ohm speakers you'd have a 16 ohm cabinet. If you were using (2) 200 watt speakers you'd have 400 watts of power handling.
Parallel Wiring - Speakers of equal impedances you divide the impedance value by the number of speakers. To determine the wattage you add the wattage of the speakers together.
If you wire (4) 16 ohm speakers in parallel you'd have a 4 ohm cabinet. (2) 16 ohm speakers in parallel would give you an 8 ohm cabinet. If you were using (4) 100 watts speakers you'd have 400 watts power handling. If you were using (2) 100 watt speakers you'd have 200 watts power handling.
Series/Parallel Wiring - All speaker's should be the same impedance & wattage. The impedance of the cabinet will be the same as one speaker. The wattage will be 4 times the individual speaker wattage.
If you're using 8 ohm speakers the cabinet will be 8 ohms. If you were using 100 watt speakers the wattage for the cabinet will be 400 watts power handling.
Si vous voulez voir ça avec les dessin allez à cette adresse:
http://www.usspeaker.com/speak(...)1.htm