Quote Originally Posted by BanginJimmy View Post
First you need to know what size power wire they ran to your current amp. Anything less than 4awg will need to be replaced with 4awg at least.
Second, you will need to get a distribution block that accepts 1 4awg in and either 2 4awg or 1 4awg and 1 8awg out. You will also need speaker wire to run from the amp to your new speakers and a set of 4ch RCA's. How many RCA outputs does your head unit have?

List model numbers and/or links for what you have and for what you plan on getting. That will help to determine what else you may need.
current amp: hifonics bxi2010d
wiring: stinger 0 guauge and monster cable i402 2 channel rca's
hu: pioneer p4100 http://www.electronicxpert.com/ebay-...P4100DVD-C.jpg

amp for the speakers i'm not sure yet maybe memphis for that too.