Vibe PULSEC8-V8 Amplified Underseat Car Audio Subwoofer – 240w Peak. Vibe Pulse Underseat Subwoofer Compact Car Audio Bass Active Amplified Sub The new entry level enclosures from Vibe combine decades of knowledge and heritage with affordability. The easiest and most affordable audio upgrade available to any car. Features & Spec: Integrated Monoblock Bass Amplifier Auto sense: an auto turn on circuit Remote Gain Controller – Allows the amplifier gain to be controlled from the front of the vehicle.