I would get a quality, efficient amp for any stereo...especially for tower use. I'm having 4 Bullet Hollow Point 770's on the tower running off of 2 JL Audio 1300 monoblock amps. Then I'll have 6 Polk db651's and a JL 10 or 12" sub off the 6 channel JL amp. I'm using 2 Deka AGM batteries with right at 200 amp hours for the stereo.