Model IFB Plus Series Talent Amplifier User Guide

Issue 2, March 2015 Model 2A User Guide
Page 32 Studio Technologies, Inc.
to dB referenced to 0.775 V, with no refer-
ence to load impedance. This takes into
account the current audio scene where
most equipment has a low output source
impedance and a high input impedance.
Models 32A and 33A Minimum
Output Level
By design, the output level on the Model
32A and Model 33A Talent Amplifiers can-
not be set to fully “off.” While the output
level can be substantially attenuated, it
never can be set for full attenuation. This
implementation was selected to ensure
that talent personnel could never acciden-
tally be fully “isolated” from their program
or IFB source. There may be special cases
where full attenuation is desired. This
might be especially true with the Model
33A Talent Amplifier, where a mix of the
two IFB channels can be achieved. Provi-
sions on the Model 32A and Model 33A cir-
cuit boards have been made to allow this
to be modified. In the standard design a
fixed resistor in series with one side of the
level potentiometer prevents full attenua-
tion. By replacing this resistor with a
“0 ohm” resistor or jumper strap, full at-
tenuation can be achieved. Contact the
factory for details.