What's going on with the Profiler's input?

I've heard (well, read) in the past Christoph Kemper say that the profiler input has some "secret sauce", and lately I've been investigating that a bit.

I recorded two DIs, one going straight to my audio interface, and one going to my Kemper player and then sending the DI to the interface. (I replayed the DI, unfortunately I didn't have a splitter at hand).

Already looking at the waves it's pretty apparent that the DIs are quite different. It's not that the Kemper DI is louder, it has much higher transients, which shows a higher dinamic range.

When you hear the DIs with some amp emulations, you can hear how the Kemper DI is indeed more dynamic, has definitely a lot more low end push and maybe a tiny bit of highs roll off. Honestly, it might not be "transparent" like people want their DI, but it sounds very musical to me, and whenever I play some amp sims I feel that they can't reproduce that kind of low-end dynamic that the KPAs have.

So the question is: does anyone have a more precise idea of what's going on there? I'm trying to understand if that can be reproduced without necessarily recording through the KPA (I have tried doing audio through USB, and had some trouble so far).

Quote from DonPetersen

I think you might have it backwards

the upper waveform looks the way I expect a guitar's DI signal to look - with clear transients.

there is something going on with the lower waveform, rather severe limiting it seems.

That may also be the case. I don't have a DI box at the moment (I'm gonna get one as soon as I can), so the signal might not be optimal.

Quote from sailor

Are you saying those are recordings of two separate performancess?

Yes, those are two separate performances.

Quote from sailor

In that case you shouldn’t be surprised that they are different.

Yeah I know, but you can see that they are "consistently" different, all transients are way more defined in the KPA DI. That's not a performance difference (cause then there would be some transient higher in one, other higher in the other).

Quote from Wheresthedug

What interface?

What input?

Motu 828es. The front inputs are a Hi-Z jack/XLR combos.

Quote from Wheresthedug

Was it a High Impedance instrument input or just a line input? An impedance mismatch would reduce the highs on the interface so that could easily account for the difference you described.

Like I said it's not the highs that are impacted, rather the lows.

Quote from Wheresthedug

On the Kemper, did you use Analog DI or DI High/DI Low? Analog should literally be like plugging into a DI box wheres the others go through A/D converfirst.

With the Kemper player I could only select DI High or DI Low (and picked Low as it seemed the right match level-wise)