Continental roots stress Earth's surface. FULL STORY. The Earth's rigid lithosphere varies laterally in thickness and strength. Areas of thicker, older lithosphere known as continental roots penetrate deeper into the mantle in some places under continents.
A monoblock is a type of amplifier used in car audio systems. What  the monoblock type of amplifier does is to split the two channels  of audio into two separate mono systemâ¦s, giving a little more kick  to the bass coming out of subwoofers.
A monoblock amp that is rated at 400 watts @ 1 ohm or at 4 ohms would be necessary. But if a 2 channel amp that puts out 200 watts x 2 channels @ 2 ohms, is cheaper than the monoblock amp rated at 400 watts @ 1 ohm, or 400 watts @ 4 ohms, then the 2 channel amp would be the way to go.