What Amp??

[kr15 5,000+ posts]

If they are 4 ohm svc and you want to run 4 subs, buy two more of the Comps and a amp that's rated for 600 - 800 watts rms @ 1 ohm

4 comps on a nice amp would be pretty nice...maybe you could trade the memphis for another set of comps...

although, if the memphis are dual4s, he could run 4 in series for a 2ohm load as well

 

[pickup1 5,000+ posts]

cant recommend an amp without knowing your inpenis of your subs!