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User Guide
FetHead Filter
High-end microphone pre-amplifier.
General description
FetHead Filter is a Fethead version with a built-in 6dB/octave high pass filter with a corner
frequency of 220Hz. It is specially designed for microphones which exhibit an excessive
proximity effect / low frequency response, like long motor ribbon microphones. The
components which make up the filter are not directly in the signal path but are applied to the
components which set the gain of FetHead Filters amplifier, thus making it frequency
dependant. This way the sonic character which makes a normal FetHead attractive to the ear is
preserved.
FetHead Filter can be distinguished by a green dot below the TritonAudio label.
Low noise
Fethead uses low noise jfets configured as a double class a amplifier. Jfet's are among the
most quiet amplifying elements available today. The calculated noise figure of the FetHead
based on the jfet's datasheet is lower than we are able to measure. In the real world the noise
injected by a FetHead depends on the noise generated by the pantom power supply, if the
power supply is quiet, FetHead is quiet.
© 2009 TritonAudio International. All rights reserved. www.TritonAudio.com
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User Guide
Circuit topology
FetHead utilises a low noise jFet amplifier circuit which reveals every detail with pinpoint
accuracy and offers high-end sound quality.
Features
• Low noise Class A JFet amplifier
• 20db amplification (@ 1000 ohm load)
• double single ended amplifier topology
• Balanced xlr input/output
• Lots of headroom
• 6dB octave high pass filter (corner frequency: 220 Hz)
• 18-48 v phantom power
Frequency response
• 10hz-100khz(+/-1db)
Gain
Dimensions
height:3,5'/82,5mm
width:0,95'/23mm
© 2009 TritonAudio International. All rights reserved. www.TritonAudio.com
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User Guide
Operation
Attach FetHead on to a balanced microphone cable and plug it in a dynamic
microphone, switch on phantom power and enjoy FetHeads Natural open sound!
Balanced xlr cable
Website
For information on new products, product warranty or technical information please
visit www.tritonaudio.com
© 2009 TritonAudio International. All rights reserved. www.TritonAudio.com
FetHead
Mixer/
Microphone-pre/
channel strip
microphone
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