The installation is for a gallery to bring special audiovisual experience to visitors. According to the explanation of the source term, it includes screens, projectors and sound systems, which is similar to the installation for a cinema, so we can refer to terms used for cinemas ---- ‘影院放映设备安装’ or ‘超大银幕放映设备’ or ‘电影放映设备’ or ‘影音设备’(Google these terms then you can find related texts). Since the this is not installation for cinema and includes video and audio, I have chosen ‘影音设备安装’.