i just took delivery of this pair of RH horns and drivers: https://reverb.com/item/6813665-renkus-heinz-ssh-800-horn-ssd-1800-16-driver they were both around 12 ohms when i used the MM. however, 1 seems to play at normal volume and the other plays very softly (switched speaker cables and the low volume followed the suspect driver). i have been running them on low volume jazz hoping to wake up the drivers. i guess i need to crack them open. what should i be looking for?