What seperates "hi-fi" from "mid-fi" in cdp's?


I find that in my search for the right CDP I really don't know what, mechanically, seperates the good from the not-so-good. Although I understand which brands are more highly regarded than others, I don't understand why.
Along those lines, I would also really appreciate a very brief description of the primary working parts of the cdp and how they differ among "levels". For instance, how does the number of bits matter? Or is it just another useless audio stat?
Or, if I am asking a bigger question that I think I am, maybe you could direct me to a good reference for this issue? Thanks JB3
jb3
Richard Hardesty's issue #9 of the Audio Perfectionist Journal has a really, really good article about this very subject(some of it might be surprising)
They're some really good low priced players on the market and some of the really expensive ones are more smoke and mirrors than an improvement. It is no doubt that some players are built to much higher standards even though they might not sound better. The type of DAC they use, the power supply and shielding, etc come into play.
At this point in the game, I would look for a SACD player that is good with cd's. Most newer CD's will be hybrids w/SACD layers. SACD sounds better with most recordings even own cheaper machines. The Sony 9000ES is an exellent example used(including a decent job on CD and plays superb DVD)and is a really good SACD player.
I have no experience with DVD Audio so I won't comment on that subject.
I use a Meridian 508-24 because IMO, it has less of a "Digital" sound and doesn't give up anything in resolution. It only weighs about 13# but it is extremely well designed. I have a excellent sounding NAD 1- bit player that, in comparison to the Meridian, misses a few small details but doesn't add crap to the sound. If you hadn't heard the Meridian, it would be satisfactory. The difference in price is $3995 for the Meridian and $599 for the NAD!
The point being, as some others pointed out, it's in what you perceive as significant for sound quality. Go listen and decide for yourself. Not everybody cares about the last nth degree of resolution. In the CD world , sometimes its just better to have a smooth, non-fatiguing player.
With all that said, the dividing line has become cloudy between midfi and hifi players(based on price). Most all are decent now and differences are in construction and ultimate resolution with the biggest difference being brand name recognition. The limiting factor now, IMO, is the CD itself and has been for sometime. Of course certain CD's are better produced than others and when you run across one, it can be a real treat!
Your ears matter. Everything else should be treated as marketing. That's not to say that a 24 bit DAC is better or worse than an 18bit DAC, but who the hell cares what DAC chip a player uses if it sounds terrible to your ears in your system.
I'd short list 4-5 players that receive good reviews then listen to them and see if one stands out.

Trying to select based on specs would be like selecting a sports car based on the number of cylinders, or whether its a pushrod or an overhead cam. In the end you have to drive it to find out.
I was hoping for names. I've been out of this market for many moons and am looking for a decent player. There are budget contraints. $1,500-$2000. Like most folks I can't audition all of the players in the system this is going into. It is easy to say listen to your ears but it is often difficult to get the chance to do so.

I remain,
This would be my short list in that price range:

Audio Aero
Naim
Muse
Cary
Sony

You can listen to what you can, either at a friends house (ask on this thread/in this forum if there is someone local to you to you who has what you are wanting to listen to and would be willing to have you pay a visit just to hear - there are plenty of Audiophiles who'd like to show off their system and share conversation with a fellow crazy), or at a dealer. Do research here, through reviews, and other real-world sites like AudioAsylum. Buy used at a fair price. Live with your choice for a while. If it doesn't click with you/your system just sell it here for a fair price and move onto something else. I've gone through many components that way to arrive at the systems that work best for my ears. I haven't really lost any money, and have had a lot of fun along the way and have met some really remarkable people, some of whom have become good friends.

Marco


PS If you are in Seattle during the time of your quest you can certainly look me up and listen to either a Naim CD5 or my Muse rig.