while I'm at it;;;;Does kemper profile speaker breakup?

norburybrook · Nov 1st 2017

AS I'm a week into the whole profiling thing, I am coming across lots of little questions etc.

So, does kemper profile speaker breakup?

obviously that's a big part of some sounds and the reason people choose certain speakers for certain amps.

If they don't, then there seems little point in doing double profiles each time you profile different settings once you have made one studio profile with the speaker and mics of your choice. you would just do all Di profiles and paste the original cab from the studio profile on to every Di profile and merge it.

M

Michael_dk · Nov 1st 2017

Below is an excerpt from the profiling manual (sorry for the partly messed up text - it doesn't translate well through copy-paste). Look at the last paragraph in particular.

Quote from Kemper Profiling Guide

Under the Hood
In case you enjoy reading about technical details, below is a description of what the Pro ler is doing during thepro ling process:

During the rst phase, you will hear white noise with a rising amplitude. The Pro ler is now collecting data aboutthe frequency response of the reference amp. The frequency response will change dramatically as the gain in-creases. This is how the Pro ler learns about the circuitry of the reference amp and the frequency response ofthe cabinet. Also, the characteristic impedance curve of the speaker, including its feedback to the power amp, isdetected in ne detail.

In the next phase, slowly pulsating white noise is sent to the reference amp. The volume of the white noise is setto a level at which the reference amp starts to distort. This is how the Pro ler learns about the dynamic distortioncurve of the tubes in the reference ampli er. Using this information, the Pro ler is able to recreate that curve withthe highest possible accuracy. This is also true for transistor-based, as well as digitally-modeled, distortions.

In the third step, the Pro ler sends a complex tonal texture that follows a mathematically based set of rules to thereference amp. This texture creates unique interference patterns that allow the Pro ler to take a “ ngerprint” ofthe DNA of the reference amp’s particular sound. The distortions of the speaker, along with the partial pattern ofthe loudspeaker diaphragm (also known as “cone breakup”) are excited by this tonal mixture. They complete thecharacteristic interference pattern that the Pro ler will reproduce faithfully, once the measurements have beentaken.

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It doesn't state whether this information is saved in the cab section of a profile or in the amp section of the profile, however.

norburybrook · Nov 1st 2017

thanks Michael, then that would tend to suggest it does profile speaker break up. I'm interested though in how that relates to cab IR's and the like though.

So if you do a DI profile how does a cabinet 'know' what the amp would do to it if you add a cab to it? Is this a dynamic process or a simple snapshot?, does it change with the amp level?

As a new profiler I'm interested in getting the best out of my own amp collection.

M

Michael_dk · Nov 1st 2017

All very good questions

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