User Manual

RackPack: Premium Mic Pre

Technology

Stage 3 – The Instrumentation Amplifier

An instrumentation amplifier is following the discrete differential am-

plifier to produce the output signal’s voltage. Functionally a summing

amplifier it eliminates possible disturbing voltages and also contrib-

utes to the main amplification with an additional +6 dB.

Foil and Styroflex Capacitors

Only the best MKP and styroflex capacitors are used in the various cir-

cuits. They sound more open and dynamic in contrast to the conven-

tional ceramic capacitors.

Output Stages

The Premium Mic Pre offers two balanced output stages: a transformer

output (Output 1) and an electronically balanced stage (Output 2).

These output stages are capable of driving very long cables (up to a

few hundred yards, depending on the capacity of the cables and the

input stages on the other end). The maximum output level is +22 dBu.

Channel Split

Since the Premium Mic Pre provides two independent outputs, it al-

ways offers you two routes for one input channel.

If, for example, a RackPack is configured as a channel strip, one pre-

amp output can feed the next module while the second output is used

to record the direct preamp signal.

Another exemplary studio application is to send one signal directly into

the A/D converter to be recorded in your DAW while the second signal

is used for latency-free monitoring (e.g. cue mix for the singer).

When playing live output 1 can be routed to the Front Of House (FOH)

while output 2 feeds the monitoring mixer.

Stage 3, Capacitors, Output Stages, Channel Split