For a semi-talentless bedroom studio musician (which is the demographic this site is aimed at), Rick Rubin's recording techniques are pretty much unobtainable. According to this piece about Mars Volta, his technique is this: 1) Get a bunch of competent musicians. 2) Rent a haunted mansion in Hollywood. 3) Install vintage Neve mixing desk, huge Pro-Tools system, lots of vintage microphones. 4) Add 500 watts of monitoring, through ProAc speakers. 5) Record. The clever bit comes in rehearsal, when Rick helps the band to turn their incoherent jams into massive records (before Rubin, most hip hop records were 6-7 minutes long). But, Music Thing's job is to present objects of lust, so here is a vintage Neve mixer, currently at £205 on Ebay. I suspect it's not exactly what Rick uses, but at least it's got a built-in telephone, which you don't see so often these days. Sorry I couldn't be more help.