Just updated QC to 3.2.0, loaded up a Parallax block and sounds great. Then I turned the cab off in the plugin and then added a plugin Parallax cab with the same settings and they sound completely different.
I was hoping to split this and feed with cab to PA and run a cab free output to my head.
Anyone else got this issue? Is this supposed to be this way?
Is this a level issue? It’s easy to sound very different if the level isn’t exactly the same, and make sure there isn’t an extra EQ stage between the amp/cab that you might not realize. This would also color the sound a lot
no, unfortunately just got an answer from support saying its expected behaviour. I’ll post the answer separately.
Hello, thank you for reaching out.
This is expected behavior and happens due to the Parallax’s internal audio path.
Parallax’s LOW BAND bypasses the cab, going straight to the EQ.
If you bypass the Parallax internal cab and use the external one as a separate slot, the low band goes to the Cab, making it sound muffled or in general, different.
Kind regards.
Best regards,
Neural DSP Support Team
Interesting, good to know. Thank you for sharing that.
Interesting… how do we bypass the cabsim then for on-stage amps while leaving it on for FOH/IEMs if the standalone cab blocks have such a disparaging difference in tone due to the audio path behavior?
Waiting on that YT tutorial 
Hope that’s an included topic as it’s an extremely common scenario
Absolutely. Feels like an oversight to me.
Yeah. It’s very restrictive. It’s basically only useful for using it standalone AND only in IEM situations with no backline. I was really hoping they’d come up with a more modular approach similar to their other plugin ports.
For instance, maybe the Parallax cabsim block could be a special block that automatically bypasses the Parallax block’s low end split to retain the original tone while allowing flexibility with other effects. Idk
You can easily split after the parallax block by freq and add the cab block only to the lane that has the mids and highs. Add an fx send before the split and go to your on stage amp / cab from there. But tbh parallax just isn’t made to be used with traditional on stage amps / cabs.
None of the NDSP plugins were meant to be for traditional amps and cabs. But QC is designed for live use. So I was hoping when they ported it over they’d take that into consideration and adapt it.
The low freqs in parallax aren’t going through the cab sim and will always sound ‘wrong’ if you put it through a cab. How would you adapt that to a live on stage cab situation? That’s what I meant by its not made for a traditional on stage amp situation. The other Plugins do replicate a traditional amp + cab setup, parallax does not.
sounds like Feature Request time
Same here, hope to be able to use parallax in FOH & amp at the same time.
I keep coming back to this thread… There’s really nothing keeping anyone from sending Parallax to FOH and an external amp/cab simultaneously.
Run an instance of Parallax on a row, disable the cab sim inside of it, send it out to your power amp/cab setup. Then split off to another row, then use a cab block to send to FOH. Easy.
You can also try adding a second instance of the plug-in, disabling the distortion section, and just running the cab sim only. If that doesn’t work–because maybe the plug-in needs the distortion section activated to send bass directly past the cab sim?–then you can simply run two instances of the plug-in on separate, isolated lines.
Perhaps not elegant, but not impossible either.
