C'est vrai que j'a pas mal recherché de trucs surles impédences, et j'aitoujoursvu (sur les sites pros) que impédencedu baffle trop faible ça grille l'ampli, trop forte ça l'use à moyen, voire court terme.
Tenez, je vous sort une partie du manuel de blackheart, ça devrait résoudre les problèmes !
Citation:
ALWAYS match the amplifier’s speaker output impedance to the impedance of the speaker
that is being used. Use only one type impedance output at a time. If more than one speaker is
connected at the same time, make sure they all have the same impedance rating. Never use
two or more cabinets with different impedance ratings. This will create an unbalanced load.
When using multiple speaker cabinets (with the same impedance rating), match the total load
impedance of the speaker cabinets to the speaker output of the amplifier.
Les calculs d'impédence :
Citation:
SPEAKER CABINET IMPEDANCE divided by NUMBER OF CABINETS = TOTAL LOAD
4 x 16 ohm cabinets with parallel inputs = 4 ohm load. For this application use 4 ohm output jacks.
2 x 16 ohm cabinets = 8 ohm load. For this application use the 8 ohm speaker jacks.
1 x 16 ohm cabinet = 16 ohm load. For this application use the 16 ohm speaker jack.
2 x 8 ohm cabinets = 4 ohm load. For this application use the 4 ohm output jacks.
1 x 8 ohm cabinet = 8 ohm load. For this application use the 8 ohm speaker jack.
1 x 4 ohm cabinet = 4 ohm load. For this application use the 4 ohm speaker jack.
Le
lien, où tout est précisé, avec en prime un super doc sur les lampes !