Manual

BASS FILTER

In addition to the tone controls, the UT200 also has a built in bass filter. This filter is fixed and cannot be adjusted or

defeated. Low frequency noise is much more of a problem with wireless microphones than with conventional micro-

phones. With a regular mic, low frequency wind noise, breath thumps or handling rumble can be filtered out at the

control board before the noise causes problems with the following electronics or speaker systems. But with a wire-

less microphone, the electronics that will be overdriven are right in the wireless microphone. Filtering at the control

board is much too late. To solve this problem, the VariMic has a low frequency filter that is so sharp that it can

remove low frequency noise without affecting any wanted vocals. It consists of a 36 dB per octave filter circuit to

sharply remove low frequency noise below 75 Hz without affecting vocal fundamentals. The lowest operatic bass

voice fundamental is 82 Hz. See the curve below.

UT200 Bass Filter

0dB

-20

-40

-60

ATTENUATOR

The VariMic head includes an attenuator to provide an additional 15dB of headroom when needed. The attenuator

should only be used when the normal Mic Level pot is already turned down as

-3dB @ 71Hz

-20dB @ 50Hz

10Hz

100Hz

1KHz

10KHz

far as it will go and the signal through the mic is still too hot. The attenuator

control is a 16-position switch marked 0 through F. “F” is minimum attenuation

or the highest signal level. “0” is maximum attenuation or the lowest signal level.

For the maximum amount of headroom, set the switch to “0.”

Note: The attenuator should not be used as a level control. The Audio

Level control inside the battery compartment is the main level control.

Adjust the attenuator only when the Audio Level control is turned

completely down and more headroom is still needed. Be sure to set the

attenuator back to its original setting for normal operation.