The virtual circuits of the XBass 4000 combine two different algorithms in order to emphasize the bass spectrum of the track:
Cost / License
- Paid
- Proprietary
Platforms
- Windows

bx_subsynth is described as 'The subharmonic generator that adds weight to audio recordings' and is an app in the audio & music category. There are more than 10 alternatives to bx_subsynth for Windows, Mac and Linux. The best bx_subsynth alternative is iZotope Ozone. It's not free, so if you're looking for a free alternative, you could try Tone Projects Basslane or lkjb BassTame. Other great apps like bx_subsynth are SSL SubGen, Leapwing RootOne, Eventide DeBoom and MeldaProduction MBassador.
The virtual circuits of the XBass 4000 combine two different algorithms in order to emphasize the bass spectrum of the track:

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