Soundstage SSC1000.1D Competition Series 1000W Mono Block Amplifier - Soundstage - HiFi, Car Audio, Home Audio, Canada
Bryston 7B³ (Cubed) Mono Power Amplifier - Schroeder Amplification
McIntosh MC451 Dual Mono Amplifier
M600 M-Class Stereo/Mono Audio Power Amplifier by Bogen Communications
4B Cubed Dual-Mono Amplifier
Amazon.com: Fosi Audio M04 Subwoofer Amplifier for Home Theater Mono Channel Digital Class D Integrated Power Amp for Passive Speakers Subwoofer Rated 100W MAX : Electronics
Soundstage C500.1 500 Watts RMS at 2 Ohms Mono Amplifier - Soundstage - HiFi, Car Audio, Home Audio, Canada
110/220V HIFI Mono 350W Subwoofer Digital Active Power Amplifier Board Pure Bass Professional Home Audio System Subwoofer board - AliExpress