Hello. I have wiim ulta connected with topping e70v and fosi za3 as monoblocks. From wiim i have also connected svs sb1000. Everything worked fine. Nice bass from sub perfectly adjusted to speakers loudness with crossover 100hz, I even checked that with 20-20khz sample and microphone. From today sub lost his loudness. It is not working, or maybe working a little when i put volume to max. I checked sub with yamaha amplifier and works totally fine, connected directly to fosi also works. It seems like FLE outup in wiim broke. I reset wiim and didnt help. Any suggestiosn before i sent it to warranty?