CD Player Output Directly Into Amp - 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 June 2012, 01:33 PM   #1
Plundering the Planet From the Comfort of Home
diyAudio Member
 
DreadPirate's Avatar
 
Join Date: Jan 2006
Location: Northern Virginia, USA
Default CD Player Output Directly Into Amp

I have an amp with a 22Kohm input impedance. I have directly connected an Oppo DV-981H to it with a great deal of distortion resulting. I would like to experiment with other CD players, particularly a modified PS1, but I'm concerned about the possiblity of damage to either. Isn't the 22Kohm input impedance high enough to not have any issues?
  Reply With Quote
Old 20th June 2012, 04:49 PM   #2
Puffin is offline Puffin  United Kingdom
diyAudio Member
 
Join Date: Feb 2006
Location: U.K
Have you connected it to a line-in?

How have you connected it?
  Reply With Quote
Old 20th June 2012, 05:58 PM   #3
john65b is offline john65b  United States
diyAudio Member
 
john65b's Avatar
 
Join Date: Jan 2005
Location: Chicago
Does you player have a volume control? If not, you will have full volume, no attenuation, at all times...

Was it Loud and distorted (clipping your amp)?
__________________
All right, but apart from the sanitation, medicine, education, wine, public order, irrigation, roads, the fresh water system and public health, what have the Romans ever done for us? Life of Brian
  Reply With Quote
Old 20th June 2012, 06:00 PM   #4
diyAudio Member
 
Frank Berry's Avatar
 
Join Date: Sep 2003
Location: Midland, Michigan
Is the amp stereo or mono? Were you combining the left and right channels? We really need more information.
__________________
Frank
  Reply With Quote
Old 20th June 2012, 06:53 PM   #5
diyAudio Member
 
Join Date: Apr 2003
Location: Eastern Pennsylvania
As John65b suggests, your trouble is too much signal amplitude. The vast majority of digital source components put out 2VRMS at full digital scale. Most amplifiers will be driven to clip by no more than a 1VRMS input amplitude, so that is almost certainly your trouble, and not an impedance mismatch.

Some audiphiles use their CD player or DAC without an active preamp. Instead, they use only a passive attenuator (volume control) to excellent result. Passive attenuators are usually (but not exclusively) either resistor based or magnetic autoformer based. A quick google search will turn up a number of commercial offerings, from diy, to a kit, to a completed unit.
__________________
Ken

Last edited by Ken Newton; 20th June 2012 at 06:57 PM.
  Reply With Quote
Old 20th June 2012, 10:59 PM   #6
Plundering the Planet From the Comfort of Home
diyAudio Member
 
DreadPirate's Avatar
 
Join Date: Jan 2006
Location: Northern Virginia, USA
The Oppo has a volume control, but there is still distortion at listening levels. The analog phono out L and R are connected to the L and R inputs of the stereo amplifier. I will look into a passive preamp.

I actually have piles of cd players. The Sony, Denon, Luxmans have adjustable line out, I have not tried these, should I?

Last edited by DreadPirate; 20th June 2012 at 11:07 PM.
  Reply With Quote
Old 20th June 2012, 11:37 PM   #7
diyAudio Member
 
Join Date: Jan 2012
Location: Pennsylvania
Blog Entries: 1
Use the heaphone output of the CD player [if available] and its volume control. I use a Marantz and a Sony CD players in this fashion without problem and with full satisfaction.
  Reply With Quote
Old 21st June 2012, 12:01 AM   #8
Plundering the Planet From the Comfort of Home
diyAudio Member
 
DreadPirate's Avatar
 
Join Date: Jan 2006
Location: Northern Virginia, USA
Quote:
Originally Posted by Antoinel View Post
Use the heaphone output of the CD player [if available] and its volume control. I use a Marantz and a Sony CD players in this fashion without problem and with full satisfaction.
You use this directly or into a high powered amp?
  Reply With Quote
Old 21st June 2012, 12:30 AM   #9
diyAudio Member
 
Join Date: Apr 2003
Location: Eastern Pennsylvania
Quote:
Originally Posted by DreadPirate View Post
The Oppo has a volume control, but there is still distortion at listening levels. The analog phono out L and R are connected to the L and R inputs of the stereo amplifier. I will look into a passive preamp.

I actually have piles of cd players. The Sony, Denon, Luxmans have adjustable line out, I have not tried these, should I?
Yes, try one of those other players. If the distortion goes away, there is trouble with your Oppo player. If the distortion remains, there is trouble with your power amp.
__________________
Ken
  Reply With Quote
Old 22nd June 2012, 12:23 PM   #10
diyAudio Member
 
Join Date: Mar 2012
Also, take your Oppo to a friend or neighbor. Check it there.

In this case, without measuring equipment, only a try out is the only solution to rule out all the errors.

And yes, try other sources.

You can also connect your Oppo to a differnet line input on your amplifier. Maybe you have a TAPE / AUX input. Or maybe a VIDEO/TV input. Connect to it, and select the correct source. Is the distortion still audible?
  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
What's the difference between CD Car Headunit and CD Home Player "line output" ? calico88 Solid State 1 1st August 2008 09:54 AM
DVD or CD player conected directly to Gainclone? captain Chip Amps 3 25th October 2004 08:55 AM
How do I use CD-Rom diy meridian 588 CD player and 800 reference CD/DVD player? jelou Digital Source 4 29th April 2004 03:48 AM
CD Player Output Vs. Preamp Output For A Sub. kspv Multi-Way 3 16th April 2004 10:45 AM
Can i connect directly DIR1701 DIN to cd-rom,Sb live s/pdif output azyx Digital Source 2 28th March 2004 01:04 AM


New To Site? Need Help?

All times are GMT. The time now is 04:19 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