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Sony VX2100 / PD170 / PDX10 Companion
Topics also include Sony's TRV950, VX2000, PD150 & DSR250 family.


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Old May 16th, 2004, 07:12 PM   #1
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Mike Pre-amp Question about VX2100

If you use the Beachtek DXA-8 powered XLR adaptor with pre-amp function on a VX2100, will this fill the need for an external pre-amp, if you have the Winter mike-input modification done?

Another issue about this Winter modification----what effect will this have on the status of the warranty, either the short factory coverage or an extended warranty from an independent company?

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Old May 16th, 2004, 09:10 PM   #2
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Re: Mike Pre-amp Question about VX2100

<<<-- Originally posted by Steve McDonald : If you use the Beachtek DXA-8 powered XLR adaptor with pre-amp function on a VX2100, will this fill the need for an external pre-amp, if you have the Winter mike-input modification done?

That I don't know, Bryan?

Another issue about this Winter modification----what effect will this have on the status of the warranty, either the short factory coverage or an extended warranty from an independent company?

It will terminate your warranty. It will be interesting to see what happens when a camera with this modification breaks. Will Sony even work on it?

Steve McDonald -->>>
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Old May 17th, 2004, 12:36 AM   #3
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The modifiedVX2000/2100/PD150/170 all require a line level input.
The DXA-8 is mic level.

The mod would void the warranty but then if the repair had nothing to do with audio i doubt the tech would even notice.

Unless you go banana crackers on high end mics, it's not really worth doing. The VX series with a strong input will yield adequate audio.

With the DXA-8 I was able to set the manual gain at 20-25%. using a dynamic with a 2.5mv input I had to go to 40%. in my experience the VX pre is ok up to 60%.

http://www.dvfreelancer.com/articles/beachtekDXA-8.html
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Old May 17th, 2004, 05:23 AM   #4
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Interestingly -- and I can't find anymore where I saw
this posted -- someone had shown a graph they
did (using audio test equipment) of the VX noise floor, and there was no difference in it between having the
VX in line level input versus having it in mic level input.
It was about -48dB for line and -47dB for mic,
if memory serves me. At any rate, I do know
for sure that it was only 1dB difference.
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Old May 17th, 2004, 10:46 AM   #5
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<<<-- Originally posted by Bryan Beasleigh :
The mod would void the warranty but then if the repair had nothing to do with audio i doubt the tech would even notice.
-->>>

Depends on whether the Sony repair center does any sort of 'standardized' test that is a normal part of their trouble-shooting routine. If the camera does not respond normally, they may open it up, find the mod and just return the camera unrepaired.

If they did agree to repair it, and I think flat-rate would be out of the question, the first thing they would want to do is replace the modified circuits to get the camera back to stock.

Why? Because they don't know what the modifications are supposed to accomplish, have no specs and no test routines. So they cannot provide a 90 day warranty because the camera will not meet original specs.

It would be interesting if someone wanted to call Sony repair and ask them about this and then report back. Remember there are two different repair organizations involved depending on if it is the consumer or pro version of the camera.
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