Quad Cortex sounds very different from demos

Support
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1

Hey everyone,
I bought a used Quad Cortex yesterday and something feels off with the tone compared to demos online.

I’ve followed multiple “dial from scratch” videos step-by-step (including Josh Middleton’s), using the same guitar, tuning, string gauge, amps, signal chain, and even the same IRs — and my results sound nothing like theirs. Their tones have clarity and focus; mine feel overly bassy, woofy, and fizzy, especially as soon as any gain is introduced.

My setup:
• Guitars: Tele, Strat, ESP LTD Josh Middleton
• Monitors: Yamaha HS5
• Output: Out 3 straight into monitors (not recording, just playing through them)

Even something simple like a Strat into a Deluxe Reverb + cab with a Jan Ray in front sounds unnatural to me — and I own that exact real-world rig, so I’m very familiar with how it should feel.

Higher gain (like a 5150 with the ESP) gets woofy in the lows and very fizzy on top.

I’ve done a full factory reset and also checked/changed global settings, but it didn’t fix it.

It almost feels like a global EQ, monitoring, or output setting is wrong — but I can’t find what it is.

Any ideas what I might be missing? Thanks!

2

What are your I/O Settings? (input gain, Output levels, etc)

3

I’ll double check when I get home this afternoon, but I’ve completely reset the unit back to factory settings and have been experiencing the same issues. I know I’m not clipping. Is there a particular setting I should pay attention to?

4

Does your tone sound the same through a pair of headphones? Have you tried using the XLR outputs? Since you stated you are using OUT3, are you just using one monitor? Have you tried the factory presets?

5

I don’t have headphones at the moment for me to try.

I have not tried the XLR as neural dsp support emailed me today stating there would be no difference there.

I am only using one monitor at the moment? Would that cause these issues? I’ll try both this evening.

6

Thanks for the reply. It’s good that you reached out to support and hopefully they will get you sorted quickly. Is your signal grid using ‘multi-out’ or ‘OUT3’ specifically? When viewing videos online, remember that they are recording to DAW so you are hearing the processed digital tones and not in the room sounds so they will be different . It may be a setting on your monitors or the IR / cab block you are using. You may also need to apply some hi/low EQ cuts to tame the lower and higher ends. There are a ton of variables to consider depending on the tone you are looking for but usually the tones sound great right out of the box. Try OUT4 and or XLR1/2 and see if any difference. Do the factory presets sound okay?

I am not familiar with the HS5 monitors but the reviews state:

Weak Bass: Lacks deep low-end; a subwoofer (like the HS8S) is often needed for genres needing strong bass. Mid-Range Peak: Can sound mid-heavy or “boomy” without calibration (like Sonarworks). Needs Balanced Connections: Requires an audio interface (XLR/TRS) for best results, not 3.5mm computer jacks.

You could also upload one of your presets for someone to try if you want.