CDROM:The cheapest CD transport with great sound - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 20th August 2010, 03:09 AM   #1
diyAudio Member
 
Join Date: Mar 2010
Default CDROM:The cheapest CD transport with great sound

I know there are many people talk about 2nd handed CDROM as transport before, but I want to mention again, because the price is DAMN CHEAP and the sound is DAMN GOOD.

1.The CDROM must have playback bottom on front panel
Click the image to open in full size.

2.The CDROM must have digital(spdif) output on rear panel, remember, don't use the analog output.
Click the image to open in full size.

Sony' Asus' Benq 52x cdrom are both good choice.

3.In order to have great sound, you must have a great power supply, and the best power supply is the power supply in the 5.25" SCSI external box, the SCSI or IDE interface is useless here, so tear all interface apart.
Click the image to open in full size.

4.Put the CDROM into the box and connect the power source, the following step is most important, there is a pair of RCA jack on rear panel, use one of them as the digital output (coaxial).

Click the image to open in full size.

Click the image to open in full size.

It cost me only USD$10 to have this CDROM transport, but the digital sound is much better then my Marantz CDP.
  Reply With Quote
Old 20th August 2010, 04:19 AM   #2
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
The sound will not be decent, because those drives cannot play data at 1x speed properly. Audio signal with no controller, no buffer, will have a VERY high amount of jitter.
It was 1995 when I did try it the first time, with a CLV drive (with less than 12x maximum speed) and still sucked... You can find now exclusivelly Zone-CAV drives.

PS: That plastic think that you press on it is called "button", not "bottom".

Last edited by SoNic_real_one; 20th August 2010 at 04:29 AM.
  Reply With Quote
Old 28th August 2010, 12:39 PM   #3
erin is offline erin  Australia
diyAudio Member
 
Join Date: Nov 2006
Location: http://www.makeitpossible.com/
Quote:
Originally Posted by SoNic_real_one View Post

PS: That plastic think that you press on it is called "button", not "bottom".
PS: That thing you press is actually a thing not a think.

Last edited by erin; 28th August 2010 at 12:50 PM.
  Reply With Quote
Old 28th August 2010, 03:11 PM   #4
oshifis is offline oshifis  Hungary
diyAudio Member
 
Join Date: Mar 2004
Location: Budapest, Hungary
Think pink
  Reply With Quote
Old 28th August 2010, 03:17 PM   #5
diyAudio Member
 
Join Date: Apr 2008
Quote:
Originally Posted by erin View Post
PS: That thing you press is actually a thing not a think.
No that think is not a thing or a button but an actuator
  Reply With Quote
Old 24th November 2014, 12:43 PM   #6
cspirou is offline cspirou  France
diyAudio Member
 
Join Date: Aug 2014
Blog Entries: 2
Reviving this thread because I have a similar project in the works.

I have a CDROM with the player functions in front and a digital audio output in back which outputs SPDIF. I plan to make a basic enclosure for it with a digital RCA out to plug into my DAC. Later on I might include an analog output stage but this is fine for now.

One question about the digital out. Is it fine to wire the digital out directly to the RCA coax or do I need some sort of circuit in between the digital out and RCA connector?

EDIT:
Also for those of you that doubt that a CDROM could be a good digital source, here is what one guy found when measuring the SPDIF signal of various CD Players.

http://www.jacquesstompboxes.com/oscillo.htm

The ASUS DVD-ROM actually measures really really well.

Last edited by cspirou; 24th November 2014 at 12:46 PM.
  Reply With Quote
Old 24th November 2014, 12:46 PM   #7
diyAudio Member
 
Join Date: Mar 2002
Location: Glasgow
The digital output on all CDROMs I've tried has been TTL level. 0 and +5V. You should really convert it to SPDIF level, but in practice it will probably work fine.
__________________
"Some of the arguments conjure images of white-coated engineers with putty in their ears, designing audio equipment and not caring how it sounds, only how it measures. I have never met such a person"http://scopeboy.com/amps
  Reply With Quote
Old 24th November 2014, 01:07 PM   #8
cspirou is offline cspirou  France
diyAudio Member
 
Join Date: Aug 2014
Blog Entries: 2
Quote:
Originally Posted by scopeboy View Post
The digital output on all CDROMs I've tried has been TTL level. 0 and +5V. You should really convert it to SPDIF level, but in practice it will probably work fine.
What does TTL mean? Is it basically the same as SPDIF but the voltage is higher? In that case would I just have to add a resistor?
  Reply With Quote
Old 24th November 2014, 01:08 PM   #9
marce is offline marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
Quite fun watching people try and correlate what the square wave looks like to the resultant sound field that comes out of the DAC
The main thing is to use twisted pair cable to the RCA connecter or co-ax so the signal and its return are always in intimate proximity to each other....
  Reply With Quote
Old 24th November 2014, 01:13 PM   #10
cspirou is offline cspirou  France
diyAudio Member
 
Join Date: Aug 2014
Blog Entries: 2
Quote:
Originally Posted by marce View Post
Quite fun watching people try and correlate what the square wave looks like to the resultant sound field that comes out of the DAC
The main thing is to use twisted pair cable to the RCA connecter or co-ax so the signal and its return are always in intimate proximity to each other....
No argument from me that the main determination of sound is in the DAC. Which is why I am going with a basic CD/DVD-ROM instead of some expensive transport. If the signal is bad enough though then it could produce errors and the link I posted was to show that a DVD-ROM can produce a clean signal.

Thanks for the cable recommendation.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY transport w/ CDROM drive vs player as transport dw1narso Digital Source 6 2nd September 2011 06:15 AM
CDROM vs transport Leolabs Digital Source 29 16th June 2011 03:20 PM
Great CDROM control KITs for sale bbp Swap Meet 172 21st January 2010 02:04 PM
SCSI CDROM as transport Mickey Digital Source 0 27th February 2007 02:04 AM
LG52x (CDROM) as a transport peakrc Digital Source 2 4th March 2004 10:53 AM


New To Site? Need Help?

All times are GMT. The time now is 11:35 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2