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attenuator

 
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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
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proffski
Über Contributor 1000+


Joined: 22 Aug 2003
Posts: 1297
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?
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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????????
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proffski
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Joined: 22 Aug 2003
Posts: 1297
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
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hector smith
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Joined: 23 Oct 2012
Posts: 15
Location: Bettyhill
PostPosted: Mon Nov 05, 2012 12:36 pm    Post subject: Reply with quote
-10dB or -20dB????????
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