SRG> Can anyone explain the concept of Unity gain, and why they
 SRG> call it that? 
 LA> Why they call it that is a mystery to me, but all it 
 LA> means is that the signal going out is exactly the same 
 LA> level as the signal coming in. The only purpose it has 
 LA> is to electronically isolate the source from the 
 LA> equipment you intend to use to process its output 
 LA> signal. 
You're thinking of a "unity gain buffer stage" of a circuit, which may add a 
lower current drive capacity as well as being a buffer.  
Unity (one) gain is simply a 1:1 in:out level ratio.  That applies to the 
settings of a mixer channel when it's not raising or lowering levels, a 
series of stages which may boost and cut levels with a net unity result, or a 
fixed level buffer or current driver.  
Terry
--- Maximus 2.01wb
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