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OTHER FEATURES
INPUT IMPEDANCE
Passive ribbon microphones and numerous moving coil dynamic
microphones are very particular about how they interact with
preamps and their respective impedances play an important part
in this. Since passive ribbon microphones and some dynamic
microphones generally have a very high impedance, they are
sensitive to what is referred to as "loading." The lower impedance
a mic must drive, the harder the mic has to work. If the input
impedance of a preamp is too close to the impedance of the
microphone, it may exhibit increased distortion, decreased
headroom, poor transient response, and less overall frequency
response. There are no negative consequences to using high
input impedance preamps.
The ultra-high gain JFET circuit has two input impedances:
11.3 kΩ with phantom power "ON" and 68 kΩ with phantom
power "OFF." The 68 kΩ brings out the best in passive ribbons
and tube mics, and also provides a unique balanced input for
vintage, high-impedance dynamic mics. This versatility ensures
the highest sensitivity, bandwidth, transient response, and clarity
possible for a wide variety of microphones.
AEAribbonmics.com
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