Review on 🔊 Fosi Audio M02 Subwoofer Amplifier Home Theater Power Amp - Mono Channel, 100Watt by Janet Williams

Maybe I just got a bad set, but it barely worked with the SoundShaker speaker I got in my Seatcraft bed (the effect is overrated, by the way, at least with a SoundShaker that comes with the chair, you hardly feel anything through all the upholstery). This amp behaved like it had no gain unless I turned the subwoofer +20dB away from the receiver and cranked the volume to a deafening level. For example +6 dB for normal hearing -20 dB. I switched to another Fosi device "TDA7498E". It's just for the subwoofer amp (and I didn't have to adjust the cutoff frequency like my receiver does for the subwoofer pre-out) and it worked right away.