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.
Speaker type Duo: Headset with earphones for both ears. Mono: Headset with earphone for one ear. Hifi/Stereo: Headset with earphones for both ears with stereo sound. Microphone type Dual microphone (Noise Blackout): Double microphone that blocks interfering ambient noise. Ideal for on-the-go. Noise cancel: Noise-suppressing microphone for noisy office environments, like call centers and open space offices.