PreSonus Blog

Create Ampire Cabs with Pro EQ2


IR-driven cabs are often the weak link with amp sims Fortunately, cab emulations have improved dramatically over the years. Yet like samples, they remain “frozen” to a particular cab—they have their sound, and that’s it.

Although some guitar players think that a cab is a magical device, it’s really just a filter. To be sure, it can be a magical filter…but it’s still a filter. So, we can use filters to create our own cabs. They won’t be able to replicate a specific cabinet down to the smallest detail, but that’s not the point. Using the Pro EQ2 filter to create your own cabinet can give responses that IRs can’t give, with a different sound that can be satisfyingly smooth, and…well, “analog.”

I analyzed the frequency response of several cabs, using the Tone Generator’s pink noise along with the Spectrum Analyzer plug-in, then tried to replicate the response as closely as possible with the Pro EQ2. Although sometimes I was shocked at how close this could come to the cab, more often than not I couldn’t help but make some tweaks—it’s almost like I had taken that cab, brought it into a woodworking shop, and made specific changes for my needs.

If you want to experiment…be my guest! Insert Ampire, choose your amp (I particularly like the following curves with the VC30), select no cab in Ampire (important!), insert the ProEQ2 afterward, and rock out. Here are some ideas to get you started. Note that the white curve is the sum of all the other curves, so that’s the curve you actually hear.

This curve is based on a 1 x12 cabinet that’s designed for leads, but works with rhythm parts as well (Fig. 1).

Figure 1


Here’s a curve that’s more “Tweedish” (Fig. 2)

Figure 2


This curve (Fig. 3) is based on an amp by a company that no longer makes amps, but whose name I better not mention so that I don’t have to deal with lawyers. Suffice it to say they’re known mostly for making guitars that are popular with rock guitarists.


Figure 3

And here’s one more…just because we can (Fig. 4)! It’s based on a 2 x 12 cab.

Figure 4

These all have two elements in common: high-frequency rolloffs, and interesting resonances. Although “EQ cabs” may not replace IRs, they’re not supposed to—this is about augmenting your options. Nonetheless, in many of my current productions, I prefer using the Pro EQ2-based cabs because it’s easier to tailor them to fit in with a specific mix.

For this week’s tip, I’m not providing presets because this isn’t about presets—it’s about editing an “analog” cab to give the sounds you need for your productions. So, the “best” curve will depend on what works best with your guitar, playing style, and production goals. In any event, I think you’ll find that constructing your own cabinet can provide a musically useful, and novel, way to expand on what IR-based cabinets can do.





  • Jeffrey Cranston

    Can’t get to your Sphere link since I have full SO Pro 5 standalone. Just takes me to a Sphere buy page.

  • Craig Anderton

    Thanks! I appreciate that. Normally I like to include downloads, but I was super-slammed this week doing videos for the virtual NAMM show that’s coming up, and got the Friday Tip to PreSonus just under the wire.

  • Jeff Clark

    Hi Craig and Everybody Else!

    I turned these presets into reality and you can get them on Exchange on my creator link here…

  • Jeff Clark

    Hi Craig!

    I was thinking about this not too long ago. It make sense that its just a filter.

    Do you have these examples as presets or do we have to do some work? Asking for a friend. 😁


  • Removing Distractions

    That would be excellent, in fact it would cause me to go out and buy the PX-1. 😊.

  • Craig Anderton

    Hmmm…I hadn’t really thought about that as a topic. For example, I don’t know how I could simulate a large-condenser mic if you’re using a small-condenser mic, and vice-versa. It also depends a lot on the source mic. However, PreSonus does make the PX-1, so probably quite a few tip readers have them. I could base some fx chains around it to give the mic different “characters.” Thanks for the suggestion!

  • Removing Distractions

    Hi Craig,

    As always good information and article. Do you think you’ll present an article on mic simulation in the future?