| There is no audio information on a CD much above 20KHz. This is purposeful.
A fundamental law of digital signal capture and re-creation says there
can be no information in frequencies above half the sampling frequency.
The CD format prescribes a sampling frequency of 44.1 Khz, so there is
no information stored representing anything above 22.05 Khz. Also,
anything above 22.05Khz generated during playback is spurious, and is called
an "alias."
The good news is that once the digital data have been recovered,
they must be changed to analog forms and be processed as analog.
This is good news, because it means that there is room in the design
for varying quality, including good, flat reproduction of the audible
range of the disc format.
I don't know the market, so I can't advise on price or brands.
- tom]
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Dave,
The first thing to keep in mind is that the sound you hear is only
as good as the speakers pushing the air mass. The best CD player
in the world, with the best amp in the world, will still sound only
as good as the speakers. In your specific case, you mentioned
Cerwin-Vega speakers. I've never seen a Cerwin Vega that could
reproduce lower than 30 Hz bass sound. The CV's are great speakers
for loud, hard rock music, but they aren't the best for quieter
jazz or classical passages. So, assuming that you really can tell
the difference between 20 Hz and 30 Hz, that's why the player
you heard didn't seem to reproduce the low end (as well as some
other factors). It's important to match the speakers to the kind
of music to which you'll be listening.
Every single CD Player for which I've read specs [probably 25-30
different players] reproduces sound *at least* across the entire
spectrum of human hearing [ 20 Hz to 20,000 Hz ].
What you get by paying more are more reliability and durablity,
as well as features such as remote controls, programming, multi-disc
capability, etc. etc. In general, there is no discernible difference
in *sound* between a $150.00 unit and a $750.00 unit.
[So, to answer your question: You can buy a better-than-decent
player in the $300.00 range!]
Other factors which affect the sound you hear from your
player/amp/speakers are: Placement of speakers in the room, size
of room, placement of your ears relative to speakers, furniture,
carpet, wall surface....
The Proton amps are real nice. I want one too!
But *Start with good speakers!!!*
-Monty-
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| Thanks for the info.From what I was hearing through notes is that
the sound is the same,But like I said earlier they were from 1985.
I wasn't sure if anything had changed.What I didn't say is that
I would be using speakers that I hae been building.Here is an
example: Each cabinet: 1 seaz tweeter liquid cooled. 2 seaz midranges
5 and 1/4. 1 becker 8'' woof,but its crossed over in mid area.
1-15'' marshall woofer.I traded 2 sea level albums for 3 of them.
Not a bad deal.The funny part is I've only finished one completly
still need 2 more of the seaz mids,but as is they sound better than
the cerwin vega's.Kind of made made my brother mad. Thanks again
for the information.
Dave
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