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Cmoy HAP need help

post #1 of 50
9/21/10 at 2:32pm
Thread Starter 

Cmoy HDP MIngo.jpg6_16427.gif

 

 

can some one tell me whts the difference ?? and which one will have a better sound ? 

and whts the advantage on each one ? Is it one Mono and One Stereo ? if so which one is which :) 

 

thanks a lot for looking and this :D

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post #2 of 50
9/21/10 at 2:47pm

No real difference, the first is useing 2 single opamps whereas the second is using a dual opamp

 

cheers

FRED

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post #3 of 50
9/21/10 at 2:54pm
Thread Starter 

WOW　thanks for the quick reply ? so on "sound" only there won't be any difference ? and is there any opamp that is recommended  ?? and which one should i build ?

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post #4 of 50
9/21/10 at 3:18pm

The difference in sound will be greater for the different op amp types

than for which circuit you use. As Fred mentioned, other than one using

two single op amps and the other using a dual op amp, they are exactly

the same circuit.

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post #5 of 50
9/21/10 at 3:21pm

Personally, I like the sound of LT1363CN8 (first schematic) or LT1364CN8 (for the second schematic).

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post #6 of 50
9/21/10 at 3:24pm
Thread Starter 
Quote:
Originally Posted by Avro_Arrow View Post

Personally, I like the sound of LT1363CN8 (first schematic) or LT1364CN8 (for the second schematic).

 

So if i use the LT1364CN8 for the IC, will it have the same function ? and do i connect them in the same way ?

 

Can you please describe more on how the LT1364CN8 sounds like ?

 

thanks a lot :D very helpful comments here :)

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post #7 of 50
9/21/10 at 3:35pm
Thread Starter 
Quote:
Originally Posted by @@anderson@@ View Post



 

So if i use the LT1364CN8 for the IC, will it have the same function ? and do i connect them in the same way ?

 

Can you please describe more on how the LT1364CN8 sounds like ?

 

thanks a lot " class="bbcode_smiley" height="" src="http://files.head-fi.org/images/smilies//biggrin.gif" title=":D" width="" /> very helpful comments here " class="bbcode_smiley" height="" src="http://files.head-fi.org/images/smilies//smily_headphones1.gif" title=":)" width="" />


and can some one tell me the value of the volume pot please :D

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post #8 of 50
9/21/10 at 3:39pm

Yes, you would use the dual op amp schematic. All dual op amps connect the same way.

If you use a DIP socket, then you can easily change the op amp to try different ones out

to see how they sound.

 

The LT1364CN8 is a very fast amp. What this means is everything just sounds more

crisp and clean. There are many great sounding op amps and which sounds best

to you will be different from which one sounds best to me...

 

AD8620 is another great sounding op amp. Not as fast as LT1364 but has great vocals.

You can use op amps that come in the SOIC package by soldering them to a SOIC to DIP

adapter like those sold by Brown Dog
 

Quote:
Originally Posted by @@anderson@@ View Post



 

So if i use the LT1364CN8 for the IC, will it have the same function ? and do i connect them in the same way ?

 

Can you please describe more on how the LT1364CN8 sounds like ?

 

thanks a lot " class="bbcode_smiley" height="" src="http://files.head-fi.org/images/smilies//biggrin.gif" title=":D" width="" /> very helpful comments here " class="bbcode_smiley" height="" src="http://files.head-fi.org/images/smilies//smily_headphones1.gif" title=":)" width="" />

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post #9 of 50
9/21/10 at 3:41pm

The pot could be any value from 10K up to 100K but

20K is a good value for a CMoy.

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post #10 of 50
9/21/10 at 3:44pm

Tangent has a great website if you want to learn more about CMoys or amps

in general.

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post #11 of 50
9/21/10 at 3:47pm
Thread Starter 
Quote:
Originally Posted by Avro_Arrow View Post

Yes, you would use the dual op amp schematic. All dual op amps connect the same way.

If you use a DIP socket, then you can easily change the op amp to try different ones out

to see how they sound.

 

The LT1364CN8 is a very fast amp. What this means is everything just sounds more

crisp and clean. There are many great sounding op amps and which sounds best

to you will be different from which one sounds best to me...

 

AD8620 is another great sounding op amp. Not as fast as LT1364 but has great vocals.

You can use op amps that come in the SOIC package by soldering them to a SOIC to DIP

adapter like those sold by Brown Dog
 


 


the LT1364CN8 sounds good to me as i can get them in uk :D  so by changing the capacity from 100uf to something like 220uf will that have a different in sounds？

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post #12 of 50
9/21/10 at 4:03pm

Yes.

Bigger caps in the power supply will give better bass response.

Even better would be to use one of the higher current virtual

ground circuits you can find on Tangents site. Even a virtual

ground based on a TLE2426 will outperform the simple resistor

divider virtual ground.

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post #13 of 50
9/21/10 at 11:48pm
Thread Starter 
Quote:
Originally Posted by Avro_Arrow View Post

Yes.

Bigger caps in the power supply will give better bass response.

Even better would be to use one of the higher current virtual

ground circuits you can find on Tangents site. Even a virtual

ground based on a TLE2426 will outperform the simple resistor

divider virtual ground.

so will it be a good idea if I put a switch in so i can change from 100 uf and 220 uf ?
 

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post #14 of 50
9/22/10 at 3:53am

No, just use the higher value.

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post #15 of 50
9/22/10 at 5:14am
Thread Starter 
Quote:
Originally Posted by Avro_Arrow View Post

No, just use the higher value.


so what do u recommend ? 220 uf ? or even higher ? or just make a switch so i can change over :D

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