This listing is for a vintage (1986) Marantz RV351 Vintage Surround Sound Processor. This enabled someone with an existing two channel Hifi to add surround for their AV needs and was one of the first of its kind. I’ve owned this for many years and am only listing as ‘for parts or not working’ because I’m now unable to test it given AV is digital these days. As you can see from picture 1 it powers up so I see no reason why it wouldn’t work with the right kit; it certainly worked the last time it was used. Condition is really good for its advancing years with only a few minor marks present. Please study the photos carefully. I do not have the box or manual but it will be well packaged and I’m sure the latter can be found online somewhere. This is a UK only listing. Thanks for looking.