0.1 Black 4D Furnishers HSWA-300 Mono Amplifier for Subwoofer 300 Watts
AudioControl LC-1.800 High-Power Mono Subwoofer Amplifier with Accubas – Plug N Play Kits
Nobsound G2 PRO 300W Subwoofer Amplifier Mini Mono Channel Class D Power Amp Hi-Fi Full-Frequency and Sub Bass Switchable Home Theater Audio Amplifier for Passive Speakers Subwoofer : Amazon.co.uk: Electronics & Photo