Robert Rozak
October 14th, 2010, 12:35 PM
Many have been using juicedLink low-noise preamps to improve the signal-to-noise performance of their cameras. This principle works by throttling back noisy camera amps, and replacing the noisy gain with clean gain from the juicedLink low-noise preamp.
This benefits of this principle are diminished if your recorder already has decent preamps.
But, even with a H4n, juicedLink low-noise preamps provide a benefit of about 8dB over a broad frequency of interest.
Here is a recording using a Rode NTG2 going straight into a H4n:
http://www.juicedlink.com/downloaddata/H4n_NTG2.wav
In order to get my vocal peaks to hit -12dBFS, I need to run the H4n mic level at 100.
Now, feeding the NTG2 into a juicedLink CX231 at full gain, then going into the H4n minijack input, this allows me to throttle back the H4n mic level to 35 instead of 100. Here is the recording:
http://www.juicedlink.com/downloaddata/H4n_NTG2_CX231.wav
To more precicely compare the noise performance, I powered off the microphone, and did recording of just the noise levels. Here is the H4n alone:
http://www.juicedlink.com/downloaddata/H4n_noise.wav
And, here is the juicedLink CX231 going into the H4n:
http://www.juicedlink.com/downloaddata/H4n_CX231_noise.wav
Using Audacity, I did an FFT plot to compare the 2 noise spectrums (attached).
Hey ... every little bit helps ...
-R
This benefits of this principle are diminished if your recorder already has decent preamps.
But, even with a H4n, juicedLink low-noise preamps provide a benefit of about 8dB over a broad frequency of interest.
Here is a recording using a Rode NTG2 going straight into a H4n:
http://www.juicedlink.com/downloaddata/H4n_NTG2.wav
In order to get my vocal peaks to hit -12dBFS, I need to run the H4n mic level at 100.
Now, feeding the NTG2 into a juicedLink CX231 at full gain, then going into the H4n minijack input, this allows me to throttle back the H4n mic level to 35 instead of 100. Here is the recording:
http://www.juicedlink.com/downloaddata/H4n_NTG2_CX231.wav
To more precicely compare the noise performance, I powered off the microphone, and did recording of just the noise levels. Here is the H4n alone:
http://www.juicedlink.com/downloaddata/H4n_noise.wav
And, here is the juicedLink CX231 going into the H4n:
http://www.juicedlink.com/downloaddata/H4n_CX231_noise.wav
Using Audacity, I did an FFT plot to compare the 2 noise spectrums (attached).
Hey ... every little bit helps ...
-R