Philips subwoofer knocking off iptv

[bruno21]

Hi folks hows all,looking for some help please,my mate has zgemma h.2s running wooshbuild he has Philips soundbar connected to tv via hdmi but when he switches on subwoofer it knocks off wifi to zgemma box and also knocks off netflix app on tv ,any help would be greatly appreciated tanx

 

[cactikid]

Simple hard wire box with cable for lan as i would be using a hub for lan connections to anything nearby.
Wifi can be hit and miss and get iffy signal.
And tv use lan cable.