Here's another poser for the audiowoos:
All these tweaks, volume knobs, cables, etc make the CD sound better, right?
Is there a theoretical maximum quality of sound (however you want to measure it) encoded on the CD?
If yes, then the theory behind all your doodads must be that without them some of the quality is lost in the process somewhere between reading the information (bits) and converting it to sound pressure waves.
If no, then there will always be another gadget that can improve the sound quality.
Exploring these two options....
If there is a fixed, maximum sound quality that can be extracted from an audio CD, and your $485 wooden volume knob helps get closer to that elusive goal, then of course you'd be pleased to know that the CD was recorded in a studio fitted with all the latest $485 volume knobs. Anything less would compromise the source material. See that mixing desk? See all the faders? That's not cheap plastic. Imagine how bad the sound recording would be if they used plastic faders!
Oh, and the cables! The miles and miles of cabling used in your average recording studio isn't your average run-of-the-mill professional audio cable. Oh no. That's not nearly good enough. It's all Quantum Crystal cable, at $30,000 a metre. Anything less would compromise the artist's integrity by not allowing all the fluxotic nuances to be recorded. And besides, if they didn't use your fancy cables then so much of the quality would be lost that what would be the point of you using these expensive cables? You can't get back what's not there.
But it doesn't stop there, not by a long shot.
I have it on good authority that musicians who care about the quality of their recordings wouldn't dream of using substandard cabling to connect their instruments to their amplifiers. Weakest link in the chain and all that, you know. The patented Guitar Magic cables at only $10,000.00 each allow the guitar amp to receive a greater range of percussive dynamics and string scrapes than your cheap nasty cable.
Have you ever taken a guitar or a microphone apart? You should see the nasty crappy hookup wire used to connect the pickup or condenser to the plug! It might only be a few centimetres in length, but it can make or break the transmission of the ultra-dynamic overtones. Better replace that bit of wire with oxygenated (or is it deoxygenated?) mega carbon conductor strands. Most decent guitar techs will do that for only $5,000.00 plus labour costs.
Looking at the other option, where there is no limit to the improvements, no limit to the quality that is embedded in the CD, please, explain where the extra information is? If it's not just a matter of more efficient/accurate reading/interpretation/conversion/transformation, if your devices can infintely continue to improve the sound, where does the extra quality come from if it's not there in the first place?
I look forward to hearing from you. In the meantime, I'll just continue listening to my CDs through my 20-year-old 25 watt NAD amp and CD player (with a broken display so I don't know which track number I'm up to) and Dynaudio speakers (home built enclosures). With ordinary cables. And no fancy volume knob.