i have a 05 honda civic hatchback, and a running a kenwood KAC-9102d, solo baric L5 15", 4g off the battery and a 8g to the amp.the speaker is run in a parallel ( tried running it in a series but it would cut off) off the amp i am using the pos and the neg ( i guess bridged) on the far ends (+ <--> -) i also have another L5 15" that i would like to install. my question is do i need another amp or could i run both speakers off the same amp ?? and if i need another amp and what might else i need to get this done