SpeakerTalk Forum Index SpeakerTalk
This forum has been set up to facilitate discussion of 1970s KEF speakers and drive units. The owner of the Forum has no connection with KEF Audio.
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

attenuator

 
Post new topic   Reply to topic    SpeakerTalk Forum Index -> Audio equipment
View previous topic :: View next topic  
Author Message
hector smith
Junior Contributor 10+


Joined: 23 Oct 2012
Posts: 15
Location: Bettyhill

PostPosted: Sun Nov 04, 2012 10:31 pm    Post subject: attenuator Reply with quote

Hi,
I am wanting to bring down my CD output of 2V output impedance 600 ohms load impedance more than 10k ohms. to match the recommended input of my amp,all 3 available inputs are 180mV. input impedance 100k ohms.in stereo mode.
I was advised to go for -10dB, but would -20dB not be closer to the amps 180mV.?


Last edited by hector smith on Mon Nov 05, 2012 12:38 pm; edited 1 time in total
Back to top
View user's profile Send private message
proffski
Über Contributor 1000+


Joined: 22 Aug 2003
Posts: 1296
Location: Tewkesbury UK

PostPosted: Mon Nov 05, 2012 12:51 am    Post subject: Re: attenuator Reply with quote

With care a simple L Pad Attenuator should do it, the calculations are simple enough.

With the usual caveats why not try a decent quality pot to start with?
_________________
I contend that for a nation to try to tax itself into prosperity is like a
man standing in a bucket and trying to lift himself up by the handle.
-Winston Churchill
Back to top
View user's profile Send private message Send e-mail
hector smith
Junior Contributor 10+


Joined: 23 Oct 2012
Posts: 15
Location: Bettyhill

PostPosted: Mon Nov 05, 2012 1:07 am    Post subject: attenuators Reply with quote

I was thinking more in-line attenuators , -10dB or -20dB????????
Back to top
View user's profile Send private message
proffski
Über Contributor 1000+


Joined: 22 Aug 2003
Posts: 1296
Location: Tewkesbury UK

PostPosted: Mon Nov 05, 2012 10:10 am    Post subject: Re: attenuators Reply with quote

hector smith wrote:
I was thinking more in-line attenuators , -10dB or -20dB????????


Quite, hence L-Pad Attenuator.

http://en.wikipedia.org/wiki/L_pad


http://www.diyaudio.com/forums/analog-line-level/212130-building-tee-attenuator.html

Or ready made but at a price!
http://www.audioelevation.co.uk/CartV3/Details_options.asp?ProductID=97
_________________
I contend that for a nation to try to tax itself into prosperity is like a
man standing in a bucket and trying to lift himself up by the handle.
-Winston Churchill
Back to top
View user's profile Send private message Send e-mail
hector smith
Junior Contributor 10+


Joined: 23 Oct 2012
Posts: 15
Location: Bettyhill

PostPosted: Mon Nov 05, 2012 12:36 pm    Post subject: Reply with quote

-10dB or -20dB????????
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    SpeakerTalk Forum Index -> Audio equipment All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group