If the DAC is the same, how different do CD transports sound?


One interesting topic of discussion here is how audible the differences are between CD players when they are used as transports only — or when they are only transports to begin with.

In other words, in a comparison which keeps the DAC the same, how much difference can be heard between CD transports?

This recent video by Harley Lovegrove of Pearl Acoustics provides one test of this question. It may not be the ultimate test, but he does describe the experimental conditions and informations about the qualifications of the listeners.

He comes to the main conclusion here: https://youtu.be/TAOLGsS27R0?t=1079

The whole video is worth watching, I think.

128x128hilde45

Re the comments about fast vs slow switching in A/B testing. When I was at university I was involved in many A/B/X listening tests. The point was not to say which sounded better, but rather to say which of A or B was the same as X, which was randomly chosen. If a listener cannot reliably identify X as either A or B, then they can't tell the difference. While subjects were free to switch as frequently or infrequently as they liked, they invariably started to switch back and forth more quickly as the test proceeded.

Our auditory memory for fine acoustic details is relatively short, and people seem to recognize and compensate for this.

Post removed 

@coralkong

 

Once you hit a certain level of transport and DAC coupled with very clean amplification, good cabling, speakers, etc...the differences are pretty easy to hear.

Listening and comparing a couple sub $1000 transports probably won’t tell you much.

So the sub $1000 transports pretty much sound the same? Even on a system with very clean amplification, good cabling, speakers, etc.? That’s quite an accomplishment in consistency it would seem. I’d get the impression that the bad transports would sound much more different in their various flaws, while the more perfected transports would become increasingly difficult to tell apart as they approach perfection.

It’s conceivable that the cheap transports all have pretty much the exact same flaws, and it’s only when somebody makes an attempt to get past those practically uniform flaws that the differences become apparent. Each maker uses different approaches and gets slightly different results, but all are better than doing nothing at all. Maybe it’s kind of like adding coatings to lenses to reduce color abberations and glare. One maker might use a coating that looks blue, another purple, or orange. They all give slightly different results, but all are better than just leaving the lenses uncoated, which would be cheaper and perhaps fine for a lot of users.

I think the coated lenses analogy is pretty good, and one that I can relate too in my recent experience. My previous glasses had coated lenses. My newer ones do not. There is definitely a difference, but for the most part I’m seeing things just as good without the coatings as I was with them. Uncoated lenses are worthy of the best frames you might want to get with them. I’d also argue that a cheap transport is worthy of the best sound systems out there. Whatever a cheap transport’s shortcomings are, it’s never going to be the weakest link in any sound system, unless it’s just downright malfunctioning, or makes too much mechanical noise.

@asctim ,

Perhaps I am making the assumption that if someone is looking at a sub $1k transport, they're probably using a sub $1k DAC as well......so, point taken, I should have been more clear.

Now, that being said, if you start talking about using.....say.....a $5k+ DAC, the differences between a $600, $2500, a $5k and a $10k transport will be much more discernable.

In my room, paired with Aqua La Voce S2, Jay's CDT2MKIII transport yields far more detail and noticeably more bass than Sim Audio Moon 260DT transport. I found the degree of  improvement disproportionally high, given the price difference. Whether this is typical or atypical, I've no idea.