What this whole discussion inadvertently highlights is the superiority of digital.
In each of the stages from recording onto multi track tape to bouncing it down to 1/4" tape to cutting the master acetate, to making the mothers to making the stampers to pressing the vinyl (I may have missed out one or two), sound quality is lost. Now with digitally remastered sound you can get it directly from multi track tapes (if they exist) and at least five generations of sound quality reductions are avoided (bouncing digitally does not reduce quality).
it's still down to the skill of the post production engineer to get the optimum sound and EQ from a tape and if there's a monmkey in charge of that it can easily sound worse than the 45. At Ace we have our own post production studios who have had decades of experience in getting the right sound from such tapes.
To summarise if you want the best sound at your all nighter install CD players (or a laptop) and play properly master sourced digital tracks.
nb if the CD is from a crap company that only dubs from original discs as they don't have the rights or expertise to handle tape correctly, they will sound worse than the 45 as that's dubbing is a further generation of sound quality lost.