ESX QE900.4 Quantum Digital 4CH AMP 4-Channel Class D Digital Amplifier 900 Watt RMS : Amazon.de: Electronics & Photo
Pioneer GXT-3730B-SET - 12 Inch Case Subwoofer and Bridgeable 2 Channel Amplifier Including Cable Kit, 1400 W Maximum Power, 30 cm, IMPP Membrane, Black : Amazon.de: Electronics & Photo
ESX qe80.4 DSP 4 Channel Power Amplifier with DSP : Amazon.de: Electronics & Photo