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Old 19th October 2001, 08:11 AM   #1
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Hi,

Has anyone used the ZAPfilter from LCAudio to replace the opamps in a CD player or DAC? Is this any good? See http://www.lcaudio.com/zapfilter.htm

Regards,

N.S. Ng
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Old 19th October 2001, 09:50 PM   #2
129508 is offline 129508  Norway
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Quote:
Originally posted by N.S.
Hi,

Has anyone used the ZAPfilter from LCAudio to replace the opamps in a CD player or DAC? Is this any good? See http://www.lcaudio.com/zapfilter.htm

Regards,

N.S. Ng
I have used the Zap filter (initial edititon) with an Rotel RDC 971. I Have also modified with the LCclock. Both mods were positive. It is the second time I do a clock mod and it is worthwhile. It is difficult to describe my observations regarding the ZAP filter, but it became more pleasant and in particular less stresing to listen to music. I have tried other CDplayers not using op-amps in the fitler stage and much of the same effect. Less tireing to listen to the music. Better perspective as well. If you have the money and the patience to mount it, go for it. I would do it again.
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Old 20th October 2001, 09:19 AM   #3
Freddie is offline Freddie  Sweden
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There's a schematic for the ZAPfilter on their webpage. Why not build it yourself and save some money. I'm sure it can be built for a lot less than $226.


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Old 20th October 2001, 07:45 PM   #4
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I would like to know where is it?
I cant find the schematic at their website!!
Thanks!
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Old 20th October 2001, 07:52 PM   #5
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I found it already! Thanks!
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Old 31st October 2001, 09:36 PM   #6
sonnya is offline sonnya  Denmark
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Remember one thing : The PCB layout is the half of the design. So be carefull with the layout!
In MK2 the have maked the signal path shorter.
Do you know if the BJT are mathed. What is there parameter they are working after if they match them?

Im not trying to stop you but that's maybe the reason why they publish there designs!?

In the old work they did for High Fidelity in denmark they did mentioned that you would get a higher performance by matching the BJT. Why should they have changed there point of view.

(Sorry about my language)

Sonny
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Old 27th December 2003, 10:38 AM   #7
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Hello,

the link is dead. Have you schematic (with PSU) and pcb to give me by mail ? (ptsoundlab@aol.com). I will try it on HK750 cd player.

Thanks.

Pascal.
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Old 27th December 2003, 01:14 PM   #8
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It's right here: http://www.lcaudio.dk/zf2dia.gif

And here the PCB layouts:
Attached Files
File Type: zip zapfilter2.zip (89.3 KB, 430 views)
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Old 27th December 2003, 01:47 PM   #9
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Thank you very much !

Best Regards.

Pascal.
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Old 24th March 2013, 08:03 PM   #10
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Anyone knows what exactly types of smd transistors was used in mk2 ?
only 2fs, 4fs, br and fr printed on them, cant find anything in web basing on this.
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