A recent lousy example... mastering technician on crack literally had monitors out of phase, wondered where the bass went and eq'd it to high hell (ya can't make up this crackhead stuff). Fortunately, it was a digital master. You have to do forensics on it to salvage certain recordings.
On a related note, i have a ns5000 based setup with a certain turntable primarily dedicated to fix crap and archive albums from obscure long gone artists (only a very crappy old pressing exists, etc)...Endured some wallet abuse, but, it was probably worth it to get the best possible salvage solution for some artist voices that would otherwise be lost forever.
What is a bad recording?

