18 db Gain Increase on XLR Input "for more better" SN 75 Euros each channel

H

headroom

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18 db Gain Increase on XLR Input "for more better" SN 75 Euros each channel

Cameras like PWM-1 or field Recorders like Zoom Tascam suffer from poor SN. Here is a solution to bring quieter recordings. It's a low noise JFET amplifier inside XLR adapter driven by +24-48 Volt Phantom. There is an afordable solution. Triton Audio FET Head Phantom. 75 Euros each channel
There are 2 other Versions dont mistake Filter and Ribbon/Dynamic Type.

http://tritonaudio.com/index.php?option=com_content&task=category&sectionid=4&id=17&Itemid=33

http://www.tritonaudio.com/images/stories/fethead_user_guide.pdf

It works exactly as discribed very well

http://www.dvinfo.net/forum/sony-xdcam-ex-cinealta/493661-pmw-ex-successor-3.html Post 35/36

http://www.zenproaudio.com/triton-audio-fethead-phantom.aspx
 
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GaryNattrass said:
Be careful as +18 db will probably overload the front end potentiometer or the op amp in the camera / device.
Click to expand...

Did not see any Problem even with High Gain on my Tascam DR 680. Maybe with some crappy recorder stuff with NO headroom. Ore unplug it and by Tascam DR 60 . But it rides the Gain in Digital like many new Preamps/Recordes wich ar not on Sound Devices Apogee Levels...
 
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It all depends on the sound source but I have had OP's feeding line levels into a mic amp on a sony Z1 etc and even though the meters showed OK levels the potentiometer and the front end op amp was making it all nicely square wave.

Most mic amp's have a fixed amount of headroom and adding gain before the input stage could lead to overload at some point.

Good idea though but as said you need to be careful and it would be better to add a better quality mixer and feed the camera input at line level.

These are designed for dynamic and ribbon mic's but it all may end up being too hot for certain capacitor mics or shotguns.
 
GaryNattrass said:
It all depends on the sound source but I have had OP's feeding line levels into a mic amp on a sony Z1 etc and even though the meters showed OK levels the potentiometer and the front end op amp was making it all nicely square wave.

Most mic amp's have a fixed amount of headroom and adding gain before the input stage could lead to overload at some point.

Good idea though but as said you need to be careful and it would be better to add a better quality mixer and feed the camera input at line level.

These are designed for dynamic and ribbon mic's but it all may end up being too hot for certain capacitor mics or shotguns.
Click to expand...


When you record very loud sound sources and and you hit the Brick wall. Then why put in this device? Simply dont us it because it is loud enough and no need to boost it? Or use the -10db Pad on the Mic and your done...
 
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http://www.rane.com/note148.html

[h=3]Step One: Evaluating Input Overload Compatibility[/h]
  1. Locate the microphone Sensitivity rating on the mic data sheet.
  2. Find the Maximum SPL from the mic data sheet.
  3. Using Table 1, find the microphone Sensitivity rating down the left side.
  4. Find the Maximum SPL rating along the top of Table 1.
  5. Move right along the Sensitivity rating row and move down the Max SPL rating column until they intersect and note the number -- this is the microphone's maximum output level expressed in dBu.
  6. From the microphone preamplifier's data sheet find the Maximum Input Level (in dBu).
  7. Compare the mic's maximum output level obtained from Table 1 against the preamp's maximum input level obtained from its data sheet to determine compatibility.
[h=4]Example Using Sample Data Sheets[/h]
  1. Microphone's Sensitivity rating is 20 mV/Pa.
  2. Microphone's Maximum SPL rating is 130 dB.
  3. Table 1 shows the Sensitivity row marked 20 mV/Pa shaded.
  4. Table 1 shows the Maximum SPL column for 130 dB shaded.
  5. The intersecting point is at 4 dBu -- this is the maximum output level of the example microphone.
  6. The MS 1S Mic Stage data sheet lists the Maximum Input Level as +10 dBu.
  7. Since this mic's max output level is +4 dBu and the preamp can handle +10 dBu, then this mic will not overload this preamp (when set for minimum gain).
 
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