User Manual

PROFILING an Amp 288
our built-in power amp sound like a tube power amp. For this reason, we recommend that you don't use any kind of
power-soaks or power-attenuators, either as a substitute for, or in addition to, the DI box and true speaker. Those
devices work mostly with simple resistors, which might inhibit the desired impedance interactions, thereby resulting
in an inauthentic PROFILE.
Besides the DI box, it helps if you own either a PROFILER with built-in power amp, or a separate solid-state power
amp, for capturing a Direct Amp PROFILE. Otherwise, it is not possible to immediately play and check the PROFILE
that has been captured.
 How to setup Direct Amp PROFILING
• Connect your guitar to the INPUT of your PROFILER and the DIRECT OUTPUT or SEND 1 to your reference amp
(this part is identical to regular studio PROFILING).
• Use a speaker cable to connect the speaker output of your reference amp to the speaker input of the DI box.
• Use another speaker cable to connect the speaker bypass output of the DI box to your guitar cabinet.
• Finally, connect the line output of the DI box to the RETURN or RETURN 1 of the PROFILER.
• Switch off the optional speaker simulation of the DI box, if it has one.
It is not mandatory to connect the MAIN OUTPUT to a monitor speaker system, or to use headphones, as you would
end up listening to the Direct Amp PROFILE without a guitar cabinet. This sound is very harsh and unnatural. A valid
A/B comparison is only possible by connecting your guitar cabinet to the PROFILER power amp, once the PROFILE
is captured.
• Enter the PROFILER Mode.
• Play your guitar and check if the OUTPUT LED shows a signal.
• Adjust the “Return level” parameter so that the LED shows green at input signals. An exact adjustment is not
necessary, the correct volume will be found automatically by the PROFILING algorithm.
• Now you can start the PROFILING procedure, as explained earlier in this chapter. Normally, the PROFILER will
automatically detect a Direct Amp PROFILE, switch off the cabinet module and capture the entire PROFILE in the
amplifier module. In exceptional cases, it can happen that the Direct Amp PROFILE isn’t recognized automatically. In
that case manually select “No Cabinet” and repeat the process.