User Manual

UAD Powered Plug-Ins Manual - 114 - Chapter 11: LA-2A and 1176LN
1176LN Solid-State Limiting Amplifier
The 1176LN is known for bringing out the presence and color of audio sig-
nals, adding brightness and clarity to vocals, and “bite” to drums and guitar.
1176LN Signal
Flow
A functional block diagram of the 1176LN Limiting Amplifier is provided in
Figure 30. Signal limiting and compression is performed by the Gain Reduc-
tion section. Before the signal is applied to the Gain Reduction section, the au-
dio signal is attenuated by the Input stage. The amount of attenuation is con-
trolled by the input control potentiometer. The amount of gain reduction as
well as the compressor Attack and Release times are controlled by Gain Re-
duction Control circuit. After Gain Reduction a pre-amp is use to increase the
signal level. The Output Control potentiometer is then used to control the
amount of drive that is applied to the output amplifier. The 1176LN is a feed-
back style compressor since the signal level is sensed after the gain reduction
is applied to the signal.
Figure 30. 1176LN signal flow
Input
Transformer
Pre-
Amplifier
GR
Circuit
Output
Amplifier
GR Control
Circuit
Input
Output