ruZZ.il
500+ Head-Fier
- Joined
- Mar 26, 2007
- Posts
- 992
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- 14
Quote:
Wrong? not quiet. In fact, it's a sign that something is quiet all-right (well, potentially all all right).
The mod removes capacitors from inside the ipod. The capacitors job is to filter out DC (direct current). The ipod's signal is created on top of this DC, though this DC is what you don't want flowing through your headphones, cause it'll likely eventually damage them, and they wont be operating properly with it. They will nonetheless still be responding to the AC signal thats on top of that DC if they are still working, BUT, the line out is not meant to be fed directly in to headphones, rather in to a headphone amp, where that direct current could be amplified and become even worse! Some amps have coupling caps that will filter it out already, but you'd need to be certain of that before taking the risk. To be sure, we put capacitors in the signal path anyway, to block that DC, which we usually put in the line out cable, or some other contraption.
In short, is'd not a sign that things are wrong, but it's certainly not good practice to try and amplify that dc and feed it into your headphones. make sure there is a coupling capacitor in the signal path, either in a cable, or at the input of your amp...
I hope this doesn't confuse you more
edit:
Ignore most of the circuitry, just take a look at the 2 right most voltage meters..
Input and output coupling
Originally Posted by bobby001 /img/forum/go_quote.gif I have a little problem : ...I still have sound when I use it without the blackgates (I tried in a soundstation). Is it normal ? I thought if I don't use a cable with BG caps I will hear noise and not the music : am I wrong ? |
Wrong? not quiet. In fact, it's a sign that something is quiet all-right (well, potentially all all right).
The mod removes capacitors from inside the ipod. The capacitors job is to filter out DC (direct current). The ipod's signal is created on top of this DC, though this DC is what you don't want flowing through your headphones, cause it'll likely eventually damage them, and they wont be operating properly with it. They will nonetheless still be responding to the AC signal thats on top of that DC if they are still working, BUT, the line out is not meant to be fed directly in to headphones, rather in to a headphone amp, where that direct current could be amplified and become even worse! Some amps have coupling caps that will filter it out already, but you'd need to be certain of that before taking the risk. To be sure, we put capacitors in the signal path anyway, to block that DC, which we usually put in the line out cable, or some other contraption.
In short, is'd not a sign that things are wrong, but it's certainly not good practice to try and amplify that dc and feed it into your headphones. make sure there is a coupling capacitor in the signal path, either in a cable, or at the input of your amp...
I hope this doesn't confuse you more
edit:
Ignore most of the circuitry, just take a look at the 2 right most voltage meters..
Input and output coupling