ZV4 has arrived. - Page 8

Jens · 20th September 2002, 09:22 AM

The PDF was made stray ahead from the Gerber file. To be clear, don’t reverse the layout in the PDF, simply put the top-layer-layout not face-to-face, as the bottom-layer, to the board, but the printed side of the layout shows to you. Alternatively, you can use the appended file in which the top-layer-layout is mirrored and all the holes are shown. 2Bak, may I ask you for commend (confirmation) – thanks.

2Bak · 20th September 2002, 09:44 AM

Ok, Jens, that's true !
On our pcbs the two sides are correctly matched, but mirrored compared to Nelson's.
This means in our case that the bottom side will be the component side and reverse. No problem.

We made 6 nice pcbs, so we won't do it over again. Two pcbs for a single ended zen4, and four pcbs for a balanced z4 version.

regards Jan

RKH · 21st September 2002, 02:26 AM

Is the Bride of Zen still a suitable pre-amp for Zen V4 given its input buffer?

Cheers
Ryan

Selfmade · 21st September 2002, 01:54 PM

I want to use the ZEN V4 for my tweeter. Is it possible to reduce the value of the capaciter C2, so that the low frequency rolloff beginns at 2000 Hz with 6 dB/oct?

Is there a possibility to this with the high frequency rolloff, too?
(e.g. midrange 1500 Hz)

regards

Günter

Nelson Pass · 21st September 2002, 08:56 PM

Yes, but you have to remember that the feedback to the
input is taken after the cap, and so while you are feeding
the tweeter through your filter cap, you must provide a
path for feedback which is before this cap. The easiest
solution is to leave the original caps in place, but tap
off before the original output caps and feed the tweeter
through the filter cap you want to use.

21st September 2002, 02:26 AM	#73
RKH diyAudio Member Join Date: Sep 2002 Location: Colorado, USA	Pen Zen (V4) Pre-amp Is the Bride of Zen still a suitable pre-amp for Zen V4 given its input buffer? Cheers Ryan

21st September 2002, 01:54 PM	#74
Selfmade diyAudio Member Join Date: Feb 2002 Location: Flensburg	active x-over (6 dB/oct) in ZEN V4 I want to use the ZEN V4 for my tweeter. Is it possible to reduce the value of the capaciter C2, so that the low frequency rolloff beginns at 2000 Hz with 6 dB/oct? Is there a possibility to this with the high frequency rolloff, too? (e.g. midrange 1500 Hz) regards Günter

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20th September 2002, 09:44 AM	#72
2Bak diyAudio Member Join Date: Apr 2002 Location: Denmark	Ok, Jens, that's true ! On our pcbs the two sides are correctly matched, but mirrored compared to Nelson's. This means in our case that the bottom side will be the component side and reverse. No problem. We made 6 nice pcbs, so we won't do it over again. Two pcbs for a single ended zen4, and four pcbs for a balanced z4 version. regards Jan

21st September 2002, 08:56 PM	#75
Nelson Pass The one and only Join Date: Mar 2001	Yes, but you have to remember that the feedback to the input is taken after the cap, and so while you are feeding the tweeter through your filter cap, you must provide a path for feedback which is before this cap. The easiest solution is to leave the original caps in place, but tap off before the original output caps and feed the tweeter through the filter cap you want to use.

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