An amplifier is an electronic device that increases the voltage or current of an input signal.  Diamond Audio amplifiers do this extremely well.  New for 2009 the small footprint, Hi-Fidelity fullrange class D HEX amplifier range are the finest we have ever built.  These amplifiers are both musical and powerful.  The D1 series hi-level inputs make upgrading an OEM system easy.  With an industry leading three (3) year warranty when installed by an authorized Diamond Audio retailer the choice is clear.  Diamond Audio amplifiers deliver.