I've got a group of loud speakers that are used to play radio programs from time to time. Each loudspeaker has a different cable length and as a result the loudest loud speaker is drastically louder than the quietest loudspeaker. Ultimately I need to balance the sound. I was thinking of just attenuating the sound of all the loudspeakers so that they match that of the softest loudspeaker but since these are consuming a large amount of power i dont think i can just put a resistance in series with the cable to drop the volume... I was thinking of an l pad but thought id see if anyone had other suggestions