bought this wonderful product a few weeks ago at the cost of $85.00 and made a large improvement in the performance of my entire stereo system . I endured a clearness to vocals and all musical instruments , better separation , and a deeper, wider soundstage. I highly suggest anyone to purchase a surge protector with a noise filtration capability of at least 60 dbs max ,such as the PSP POWERTRACKER .I, also recommend all to buy this product for several reasons: 1) cost 2) helps equipment perform to its full potential (which you might not be aware of).