I coundn understand what u ve siad.. Pls explain ...
Music on a CD is stored as digital data. For you to hear it, there are number of steps involved.
Step 1. First is playing the source. This is done by a CD player or a universal DVD player that can also play an audio CD.
Step 2. The output from the player will usually be in digital form. To make this into something that we can hear, the digital data stream is converted into analogue. This step is called Digital to Analogue conversion or DAC, in short.
Good CD players have in-built DAC circuitry and send the analogue output as left and right channel music to what are called RCA connectors at the back of the player. This output is in analogue form.
CD and DVD players can also send the signal out in it's original form. In this case, the digital to analogue conversion has to be done by an external DAC processor.
Step 3. The analogue output from the CD player will be very weak electrical signal in the range of 250 millivolts or 250 millionth of a volt. Nothing can be done with this signal. So, a pre-amplifier takes in this signal, amplifies it a bit to something line 2 volts. The preamplifier provides voltage gain but no significant current gain.
Preamplifier also incorporate equalization, tone control, and volume control.
Step 4. A power amplifier takes the output from the pre amplifier and amplifies it to what is termed as line-level (about 30 volts) that are fed to the speakers. The power amplifier provides the higher current necessary to drive loudspeakers. The speakers convert these electrical signals to sound for you.
Pre and power amplifiers can be separate units or housed in one box when it is called a Integrated Amplifier.
What AudioDelic was trying to tell you is the following:.
A CD Player has to play only a two channel digital signal, convert it to analogue and feed it to a pre-amplifier. The circuitry inside the CD player is thus optimised for two channel music. A good CD player also has a good DAC circuitry to convert the digital signals to analogue.
A universal DVD player, on the other hand, always have two circuitry. One for playing of two or more channels of audio, and another for video. A DVD player is made for watching movies, and is optimised for video. An external AV Receiver is expected to decode and play the audio well. Most DVD players would compromise on the two channel music and its associated circuitry include DAC to keep costs low.
Thus the general belief is that a good CD player would always provide superior sound. At the same time, since better DVD players can also output good digital signals, such a player hooked to a good external DAC optimised for two channels would also provide quality music.
Please read the following links
1.
http://www.hifivision.com/dvd-playe...1483-questions-universal-dvd-player-more.html to understand an Universal Player.
2.
http://www.hifivision.com/mp3-mp4-wma-players-accessories/1508-wadia-itransport.html to under what a DAC is.