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.
PA500L â PA1000L Linear Amplifiers â Low Noise and Distortion Performance. Compact standalone amplifiers designed to support LDS vibration test systems, use both permanent magnet shakers and also small electrodynamic shakers. Both are used with a separate field power supply. The PA500L and PA1000L amplifiers are linear amplifiers with very low noise and distortion performance. Features.