The Built-In Power Amplifier - Kemper PROFILER Main Manual

Working with Amplifier PROFILEs, Cabinet PROFILEs, Power Amps and Guitar Cabinets 63
A little more explanation might be in order. There is an important difference between tube power amps and solid-
state power amps, insofar as solid-state amps try to obtain a linear frequency-response, tube power amps often
create an "artistic", non-linear frequency-response. Solid-state amps offer a low output-impedance that dampens the
resonances of the speaker. Tube power amps don't dampen so well, and allow the speaker to resonate more fully,
thus creating an individual frequency-response in addition to the tube power amp's response. This is called
"interaction of the amp and the speaker". In Direct Amp PROFILEs, or Merged PROFILEs, this interaction is already
captured in the PROFILE. In regular Studio PROFILEs, the interaction is simulated. Only a solid-state amp can play
back your PROFILE in an authentic way, and imprint the original impedance behavior to your speaker, without
adding additional, unpredictable interactions and the colorations of another tube power amp.

The Built-in Power Amplifier

The optional built-in power amplifier allows you to connect your PROFILER to 4, 8, and 16-ohm guitar cabinets, as
well as unpowered full-range cabinets. It is cabled to the MONITOR OUTPUT internally, so all features of the
MONITOR OUTPUT are applied to the internal power amplifier as well. Please refer to the
chapter of this manual for more detailed information.
You will find controls for the power amplifier on the dedicated page of the

Power Amp Switch
"Power Amp On" activates the built-in power amp. There is no specific need to switch it off when not in use; unlike a
tube power amp, the built-in Class D amp is not in any danger when you have no speaker connected. Nevertheless,
you may want to switch it off to reduce energy consumption.

Power Amp Booster
As mentioned, the power amp is internally connected to the MONITOR OUTPUT, which provides enough headroom
to support even the loud attacks and transients of clean guitars. However, this comfortable headroom will naturally
MONITOR OUTPUT
Output Section: