Boss Audio Armor 4000-watt Monoblock Class D 1 Ohm Stable Amplifier 

Get big sound from a compact source with the Boss AR4000D Class D Monoblock Amplifier. With a slimmer chassis, this Boss Monoblock Amplifier is the perfect tool when space is limited and power is required. This highly efficient and powerful Class D Monoblock Boss Amplifier is suitable for subwoofers and drivers who want their music to make an impression. The combination of feature-rich performance and ease-of-installation makes this amp the perfect choice for owners of any kind of automobile. Indeed, this marriage of power and convenience is hard to find in the automotive environment--so much so that it may well be forging its own product category. If you want rich sound and unmatched simplicity, consider buying the Boss AR4000D Class D Monoblock Amplifier.