User Manual

Stack Section 139
As the dynamic range of an analog tube amp is limited by the laws of physics, power sagging can only go to a
certain level before the breakdown of supply voltage destroys the beauty of the distortion characteristics. The
PROFILER allows for a much wider dynamic range, while preserving the character of the tubes at the same time.
Turning down the volume knob on the guitar results in a very natural, clean sound with full dynamics and lots of
energy.
Power sagging cannot be reproduced using a conventional compressor, but it can be further enhanced with the
dedicated compressor circuit. The breathing of the tubes becomes most apparent with dynamically played, semi-
distorted or so-called crunch sounds. With fully distorted sounds, the tubes are always under full load, while clean
sounds don’t put any load on the tubes at all - the “Power Sagging” parameter will only have a minor effect with
these types of sounds.
 Pick
The “Pick” parameter allows you to control the level and sharpness of the pick attack independently from the
sustained portion of the sound. The result is also independent from the amount of distortion. You can use this
parameter to make clean sounds even more percussive without having to use a compressor. With fully distorted
sounds, you can revive the attack phase of any notes that get drowned in the natural compression caused by
distortion. If you set “Pick” to a negative value, it will soften the attack, resulting in a more fluid sound.
 Compressor
This “Compressor” parameter is different from the Compressor effect, as it is a part of the simulated amp circuit. In
other words, it allows for completely different sounds compared to compressors that are inserted before (pre) or after
(post) the amp module. Distorted signals are not affected by compression; so only clean signals will be boosted. The
dynamics of your playing are fully retained, allowing you to go from a crunchy sound to a compressed, clean sound,
purely by the strength of your picking. The volume knob on your guitar works exactly as you would expect: for
instance, reducing the volume of your guitar will transform a dynamic crunch into a clean, compressed sound with
full energy.