I think its only NAD's that use the small U shaped metal link between pre and power amp, but if other's do to this could well be right up your street.\r\n\r\nWhen I first had my NAD 3020 mid '80 they were really the only amp to get on a buget. But as the years pasted many other designs came along to challenge the humble 3020. As I was unable to afford the next flavour of the month I started to see if ther were areas where I could improve its performance. \r\n\r\nIt seem fairly self evident that those two U shaped links could be an area of improvment.\r\n\r\nThe first thing I tried was simply to clean them. Suprised that I could hear a difference then got me thinking of replacement links.\r\n\r\nI tried a number of alteratives, the best of which are...\r\n\r\n1 make two very small IC cables wih decent plugs,\r\n Very worthwhile but fiddly and time consuming and expensive. \r\n\r\n2 take a length of 25-30 amp earth cable, strip the insulation and make a copper version of the u links. I recall it used to be a single solid core, but now seems to be a multi strand. The last one I made I needed to loose several strands to make the thing fit.\r\n\r\n3 single cooper strip cut from a pipe, and bent to shape.\r\n\r\n4 Which I intend to try when pennies are not so tight. 4mm fine silver rod from a jewlery supplier, cut and bent. This was recommended back in the dim past, HiFi Answers I think ?\r\n\r\n5 You may say why not just close the link internally, and I'd say yes good one, except I've a pair of power amps that sometimes need a preamp. So that why I keep the link open.\r\n\r\n\r\n\r\nSo if there are any 3020 users still out there one of the best modds I done, beating everything else put together.............. I changed the volume pot to a Bourns conductive plastic. Wow the typical NAD warm haze it casts over the music is gone to be replaced with a suprising neutral clarity.