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Old 23rd May 2007, 08:40 PM   #1
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Default MKP rated X2

Hi there,
on a source I want to change the older than old DC blocking caps, 0.33F electrolytics, for better ones. Not the best, the aim is to improve the sound for nothing if possible. In are now 1F MKS, but I find it's not to be left in. I've in hand 0.22F MKP but X2 rated, MKT 2.2F. Or even 0.03F Siemens MKP. Does the X2 rated MKP fit? MKP is MKP, isn't it?

Thanks!
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Old 24th May 2007, 04:47 PM   #2
Nordic is offline Nordic  South Africa
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What is the value of the resistor it is connected to...?
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Old 24th May 2007, 05:32 PM   #3
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X2 rating is simply a safety failure mode rating.
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Old 24th May 2007, 07:16 PM   #4
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So X2 is not a sound problem, MKP rules

Here is the pic of the output of my tuner, the closest resistors feeding the caps (my MKS here) are 2.2k. I don't know if they are the one you talked about Nordic, maybe to check the value of the caps?

Click the image to open in full size.

Thanks guys!
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Old 25th May 2007, 03:29 PM   #5
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Hi,
those two pots may be presets to control the level of signal fed to the amplifier.
If you can read off or measure their resistance then that may help.

The reason for asking is that a few components in the input are there to filter the signal before passing it to the amplifier.

There are usually a low pass filter and a high pass filter. The series capacitor and the following resistor to ground form the high pass filter that blocks DC from entering the amp and also attenuates very low frequency signals. The bandwidth of the following amplifier should/could affect choice of capacitor value.
The filtered signal should match the designer's specification and changing caps could change the way the amplifier behaves.
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Old 25th May 2007, 03:56 PM   #6
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Ok I see, but... can I use something I've got here ?
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Old 25th May 2007, 04:29 PM   #7
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I'll try to draw the output of my tuner to help.
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Old 25th May 2007, 05:10 PM   #8
Nordic is offline Nordic  South Africa
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you can try the .22uf, but it will likely sacrifice some low frequency extention. As said above, stick to original values, play round with types if you want to... those red caps (WIMA?) are normally fine...
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Old 25th May 2007, 05:12 PM   #9
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OK thanks!
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Old 29th May 2007, 02:34 PM   #10
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Got Wima MP3 0.33uF, do this sounds good or at least like the MKS? At least they are the right capacity.
Like these:
Click the image to open in full size.
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