Noisy mic pre's on the HD-251/200? at DVinfo.net

Marc Jayson · March 9th, 2007, 06:17 AM

I noticed a lot of noise on the audio tracks even when there is nothing connected to the inputs? Am I the only one with this problem?

I used a Sennheiser HD25 headphone for the test.
I turned both input levels to 0, the noise (and a high pitched sound) starts to appear if the monitor volume is at 12:00 it becomes annoying at 12:10
So this is the standard headphone noise.

When I turn up the audio input level to 6 the Mic pre's get noisy, with still nothing connected!

Ronald Wilk · March 9th, 2007, 09:57 AM

Hi Marc:

I have a 250 as well and it is as quiet as a mouse!

If nothing is connected to the Mike XLRs, make certain that phantom power is turned off ... alternatively, flip the switches to line.
The manual specifically states that leaving the Phantom power turned on without a mike attached can lead to noise.

Steve Oakley · March 9th, 2007, 03:52 PM

I have the same problem... get the camera serviced

Marc Jayson · March 11th, 2007, 08:22 AM

- Ronald I switched off phantom power.

- Ok Steve I will!

March 9th, 2007, 06:17 AM	#1
Marc Jayson Regular Crew Join Date: Oct 2006 Location: The Hague, The Netherlands Posts: 112	Noisy mic pre's on the HD-251/200? I noticed a lot of noise on the audio tracks even when there is nothing connected to the inputs? Am I the only one with this problem? I used a Sennheiser HD25 headphone for the test. I turned both input levels to 0, the noise (and a high pitched sound) starts to appear if the monitor volume is at 12:00 it becomes annoying at 12:10 So this is the standard headphone noise. When I turn up the audio input level to 6 the Mic pre's get noisy, with still nothing connected!

March 9th, 2007, 09:57 AM	#2
Ronald Wilk Regular Crew Join Date: Jan 2007 Location: Boca Raton, Florida Posts: 116	Noise Hi Marc: I have a 250 as well and it is as quiet as a mouse! If nothing is connected to the Mike XLRs, make certain that phantom power is turned off ... alternatively, flip the switches to line. The manual specifically states that leaving the Phantom power turned on without a mike attached can lead to noise.

March 9th, 2007, 03:52 PM	#3
Steve Oakley Trustee Join Date: Apr 2006 Location: United States Posts: 1,158	I have the same problem... get the camera serviced

March 11th, 2007, 08:22 AM	#4
Marc Jayson Regular Crew Join Date: Oct 2006 Location: The Hague, The Netherlands Posts: 112	- Ronald I switched off phantom power. - Ok Steve I will!