User Manual

KEMPER PROFILING AMPLIFIER42

ensure that you are only hearing your reference ampliﬁer through the KPA, it’s a good idea to place the

speaker cabinet of the reference amp in a dierent room (in other words, somewhere you won’t hear it)

and away from the monitor system you are using for the KPA. Keep in mind that this will not change the

result of the proﬁling process in any way, but will make A/B comparisons between the reference amp and

the KPA much easier.

If you want to make proﬁles of computer-based amp simulations, but without using any kind of external

mixer for monitoring purposes, you need to be careful not to create a feedback loop. One easy way to

avoid potential feedback loops is by using only headphones to monitor the output of the KPA while proﬁl-

ing. You can also make appropriate settings in your DAW to prevent the output signal of the KPA from be-

ing routed back into the KPA.

 Considerations regarding noise and hum

If you’re proﬁling a very high-gain sound, you’ll probably hear a certain amount of noise from your guitar

amp. This is the well-known “high-gain hiss” and nothing unusual. However, if you detect hum, or other

noisy artifacts, from your reference amp then you probably have a ground loop. Press the GROUND LIFT

switch on the back of the KPA for both the MAIN OUTPUTS and the RETURN INPUT. If that does not solve

the problem, try dierent combinations using the other GROUND LIFT switches. It is important that at

least one of the GROUND LIFT switches is not pressed to make sure that the KPA has at least one ground

connection.

 Remember that hum and noise is undesirable and might have a negative inﬂuence on the proﬁling process.

Often, the best results are achieved by pressing the GROUND LIFT buttons for all outputs except for the

DIRECT OUT.

 Other considerations

 Make sure that you are hearing the previously-selected rig in the KPA when you set the A/B comparison

to “Kemper amp”, and the to “Reference Amp” when you switch to reference amp. If you don’t, re-connect

your reference amp to the KPA.

 Playing back proﬁles over the MONITOR OUT using a regular guitar cabinet is one of the main features of

the KPA, but it is not recommend to use a guitar cabinet as a reference monitor for a proﬁling session. For