LCAudio ZAPFilter

[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

 

[129508]

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.

 

[Freddie]

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.

 

[hatasa]

I would like to know where is it?
I cant find the schematic at their website!!
Thanks!

 

[hatasa]

I found it already! Thanks!

 

[sonnya]

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

 

[PTSOUNDLAB]

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.

 

[Lars Clausen]

It's right here: http://www.lcaudio.dk/zf2dia.gif

And here the PCB layouts:

 

[PTSOUNDLAB]

Thank you very much !

Best Regards.

Pascal.

 

[jaskierster]

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.

 

[georgehifi]

They were Zetec or something similar for memory. circuit below with dc servo included.

Cheers George

 

[dacen]

Here is another one:

 

[krysiaska]

It may be Philips BC850 -2Fs and Philips BC860 -4Fs


Probably BR and FR markings are ROHM 2SC4617 and 2SA1774