Amazon.com: Nobsound G2 PRO Hi-Fi 300W Subwoofer Power Amplifier Mono Channel Class D SUB Audio Amp : Electronics
Fosi Audio M04 Subwoofer Amplifier for Home Theater Mono Channel Digital Class D Integrated Power Amp for Passive Speakers Subwoofer Rated 100W MAX - Yahoo Shopping
Amazon.com: Nobsound 100W Full Frequency Mono Channel Digital Power Amplifier Audio Mini Amp (Black) : Electronics
Audiopipe APCLE-3002 1500 Watts 2 Channel Class AB Mono Amplifier - Walmart.com
Kicker 47KEY5001 Digital Signal Processor Smart Mono Subwoofer Amplifier Bass Revealer and Processor Vehicle Audio System (Black) | electronicsexpo.com