An excellent way to get those RCA surround sound outputs from your home theater system to plug into higher end, higher powered speakers and/or amplifiers that accept XLR connections. Level control per each channel is a huge bonus.
This was used in a professional studio setting and is in excellent shape.
More details here: https://www.bhphotovideo.com/c/product/289840-REG/RDL_FP_UBC6_6_Channel_Unbalanc_to_Balanc.html/?ap=y&ap=y&smp=y&smp=y&store=420&smpm=ba_f2_lar&lsft=BI%3A6879&gad_source=1&gclid=CjwKCAiA3Na5BhAZEiwAzrfagCW2c-kPzKvi4PIIzESybHZtlSxX1fR-ejDkxOxmApeNC65GRMc_vRoCTSEQAvD_BwE