What is the least compressed signal?


Hello everyone.I was wondering what everyone's thoughts might be about what is the least compressed front end signal? A friend of mine recently told me that radio signal is compressed. So I thought maybe a direct connection to a CD player? Or, since CDs are pretty compressed, maybe a record player? Thoughts?
the reason I ask is, my friend recently gave me a fantastic pair of speakers. And I've been listening to the radio through them. He had a disgusted look on his face and told me I was not using these speakers how they were meant to be used, because the radio signal is kind of crappy and compressed. I would love to use the speakers as they were intended. Meadowlark kestrel hot rods hooked up to an Integra receiver w/ kimbers
ddjr
I suspect audiophile uncompressed quality could mean just about anything except MP3. And I actually would not rule out MP3. Most likely a bit of salesmanship in any case.
In any event, lossless and high bit rate/high sample digital are the gold standard of dynamic range. Vinyl doesn't even come close even under ideal circumstances. 
Here’s a page from the Dynamic Range Database that shows very clearly - at least for this example of Abbey Road - that the dynamic range of vinyl can be as high or even higher than lossless digital or hi bit rate digital. The issue is not black and white. 🦓 Even some SACDs and SHM-CDs and Hi Res downloads are being aggressively compressed. That’s the whole point. Read ‘em and weep! 😢

”Perfect Sound Forever!” 🤗

http://dr.loudness-war.info/album/list?artist=Beatles+&album=Abbey+road
@geoffkait 

Pretty sure I debunked that website and explained why their results aren't worth anything, but I'll explain again if I wasn't clear.

That website is merely a database of user submitted results using any number of methods to gain a measurement. It's been proven that the most popular tools used to measure the dynamic range of vinyl produce false results. Results from other media may be suspect as well. There's no scientific controls being applied there, and the results are, at best, as dubious as the demonstrably flawed methods used to formulate them. 
Kosst - If you think the data is false and that it’s been proven false, prove it! Talk is cheap.

From my experience the data in the database jives with listening. The method of assigning relatively low values to dynamic range values would probably account for any small errors in dynamic range calculations. The database is only supposed to be a general guide, it’s not supposed to send a man to the moon. And if multiple dynamic range numbers are submitted for the same recording the average values can be put into the data base. The numbers can also be refined over time.

There are presently more than 133, 000 recordings in the database. If there are errors the system should eventually weed them out. In any case, your speculations about dynamic range of digital and vinyl certainly appear to be demonstrably false.

“You can’t debunk what’s not bunk.” - audiophile axiom