[Mod_Evil]

Hi!
I'm building my Cmoy. Originally, the Cmoy the input capacitor is 0.10uf, but i don't have 0.10uf capacitors

. May I use a Polyester 0.22uf as an input capacitor of my Cmoy? Would I notice any difference in the sound?

Thanks for the attention.

 

[Pars]

Yes, you may, although polyester isn't the most highly thought of film material (polypropylene is, or teflon). 0.22 uf will give you a lower corner frequency for the high-pass filter formed by the input capacitor and R1, I believe (100K), so the bass response will be a little better. If your device (CD player, whatever) does not have issues with DC offset, you can bypass the iput capacitor altogether and just go straight in.

 

[Mod_Evil]

So, shall I have a better bass response, then? Would I have "tighter", well-defined, bass notes?

 

[Sinbios]

No, the bass goes lower.

 

[guzzler]

Quote:

Originally Posted by Sinbios No, the bass goes lower.

While this IS true, it's not the whole story. The frequency that is calculated (f=1/(2*pi*R*C)) is the 3dB point, ie the half power frequency. This means the attenuation actually carries further up in frequency asymptotically toward 0dB, as the filter is not a brickwall. Therefore, a larger capacitor moves the bass attenuation further down in frequency, and therefore could improve the perceived sound. However, the -3dB is usually so far down (try the numbers, the R is the resistance to ground after the capacitor), that you'd be hard pressed to hear a difference