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Old 25th February 2005, 06:39 AM   #11
Rarkov is offline Rarkov  England
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Hi,
Thanks for all the replies. It serves no purpose other than to have a fiddle and see what the effect is (since I have the components spare).

I think I will try Sheldon's link. I have heard that the MF X-10 buffer adds something special to source equipment and I'm interested to try it.

Gaz
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Old 25th February 2005, 12:54 PM   #12
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Originally posted by fdegrove
Hi,



Local search engine will dig up everything but that....

Cheers,

Probably a copyright thingy. Oh well...
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Old 2nd March 2005, 06:22 PM   #13
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Hi There,
I used to have the MF X10D, indeed it did add some air and detail to an otherwise cheap CD player. used it for 7yrs before making my own valve preamp.
I made my own valve preamp based on Joes CC CV VB design. It has a similar effect to the X10D. Not a trivial matter to get the best out of this seemingly simple circuit. The power supply is the key.
Why not build a Valve ouput DAC. It uses the Valve in its optimum role as a current to voltage converter (DACs produce current), eliminates the opamps from the CD output. There are a few designs knocking about on the web.

Shoog
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Old 2nd March 2005, 08:50 PM   #14
Rarkov is offline Rarkov  England
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Hi,
I have a Perpetual Technologies P-1A / P-3A for the digital side so I can't justify replacing those yet...It is more interest to see what the effect is.

My plan is to make it switchable between the tube output and the CD Transport's output. I guess you could think of it as an A/B comparison....

Gaz
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Old 3rd March 2005, 04:16 AM   #15
Raj1 is offline Raj1  United Kingdom
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Default opamps vs tubes

Hi,

I too used to think that opamps were good, but usually those 'awesome' distortion profiles have been gained thru masses of feedback, this makes things sound very flat when you compare them to tube circuits that use very little feedback. No matter how good you think opamps seem to sound, there's just no gong back once you compare with a good tube circuit. Tube circuits built properly can absolutley blow opamps away in every area. I would look for a good tube stage on the web, www.ultranalog.com has a few........

Frank is right there are far better ways to go about this.....

Thanks
Raja
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Old 3rd March 2005, 05:23 AM   #16
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Default Re: opamps vs tubes

Quote:
Originally posted by Raj1
I would look for a good tube stage on the web, www.ultranalog.com has a few........
Ultranalog has (sadly) been offline for a while. Some may have the valve output stages, named CD Enhancers saved on their computers, though.
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Old 3rd March 2005, 06:45 AM   #17
jormajj is offline jormajj  Finland
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Quote:
Some may have the valve output stages, named CD Enhancers saved on their computers, though.
Attached Files
File Type: pdf cdenhancer2_5687.pdf (14.8 KB, 306 views)
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Old 3rd March 2005, 08:12 AM   #18
Ola is offline Ola
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As far as I remember, the goal for MF 10 buffer was to have a very large input resistance and little output one, so the frequency response of gear with high output resistance will not be affected by the not-so -high input resistance of common amplifiers.
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Old 3rd March 2005, 10:06 AM   #19
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Originally posted by jormajj

I can't open this file?
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Old 4th March 2005, 01:45 AM   #20
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Any other "CD Enhancers" schematics out there?
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