1. Maybe you can buy Kicker - CX-Series CX300.4 600W Class AB Bridgeable Multichannel Amplifier with Built-In Crossovers - Black for your amplifier.
2. If you don't buy Bose Panaray 502A, you can buy Bose 402 II Loudspeakers Bose Pro Audio Portable Sound System Package Includes Digital Controller.