Yes, obviously "analog sounds better".
sound = analog no matter what you do.
But, if you mean that fully analog equipment sounds better than digital equipment simply because of the fact that it's analog and expensive, you're mistaken. That, and you won't find very many sources of purely analog
music these days. If your source is a CD, then you're going to be running 44.1x16 no matter what you do. If your source is an SACD, that's still digital, just with more channels/higher bitrate. Even if you're listening to a record or a tape, there's a good chance it's been passed through some box somewhere that has a DSP chip in it - Digital signal processing = digital.
"a computer never will be able to reproduce sound as good as analog" - That's like comparing apples to oranges. A computer can be used to reproduce sound, "analog" can mean a lot of things, many of which have nothing to do with sound.
But if you're saying digital devices will never be able to reproduce a signal (sound or otherwise) as well as analog ones, then you've got something wrong. Yes, using digital equipment to sample a signal degrades that signal. There will always be aliasing, and there will always be the Fs/2 artifacts introduced by the discrete sampling. Unfortunately, with analog equipment you get all kinds of different distortion.. zero-crossing distiortion in push-pull amps, capacitive coupling eliminating low frequency, stray capacitance capping your highs, harmonic distortion introduced by the non-linearity of the transistors, all that stuff. No audio system will ever be fully digital simply because of the fact that audio itself is not. However, if you're talking about reproducing prerecorded sound, digital will always be more faithful to the original because once it is recorded, it doesn't change its bits when you put it on another CD. The same can't be said for any analog recording medium, no matter how good.
Unfortunately, if we're talking car audio here i'm assuming you're comparing CD's to computer sound cards. On a computer you have the option of increasing your sampling frequency to upwards of 96khz, and your bit depth to 32 bit. CD's are 44.1khz x 16 bit, so already you've got an advantage if you use a computer.
"this is like 10k setup not inculding wires it suggest monster cable

" - I have yet to see someone prove to me that using ludicrously expensive cables with gold plated tips and massive conductors for line level signals improves the transmission of audio signals to any reasonable degree. Good shielding IS important at line levels, but i have yet to hear the difference between a $120 sheilded monster cable and a $20 "standard" cable on the same setup, and i have also never seen a difference when i've put a scope on the cables (under 500khz mind you, but everything above that is going to be filtered in the
amplifier anyways)
Speaker cables are the same story. There are 2 things that get me about speaker cables. #1 - speakers are not succeptable to induced EMF to any reasonable degree, and therefore do not require shielding. #2 - speaker wires DO need to carry a lot of current, and do so at low voltage drops.
I've worked in production audio for about 5 years now, and the biggest speaker cables for the most powerful drivers (2000W dual 18's) i've ever seen are 6 gague, and those were run over distances greater than 100' with no noticeable degradation in signal quality.
Always remember, sound is heard in a really narrow bandwidth relatively close to DC (at the MOST maybe 5Hz - 150kHz). Dealing with signals in that bandwidth is really quite easy to do for the most part, transistors work well, there's not a lot of problems with stray capacitance and there's no big issues.
Do yourself a favour, read a couple books about AC electronics, do some research about how signal transmission works and don't be suckered into buying stupid expensive cables. - Then, buy nicer amps and drivers with the money you save, they'll make a hell of a lot more difference to the sound you hear than expensive cables, or trying to force digital sources to be something other than digital when they get amplified.
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