SUB BASS 808

This virtual bass module features 36 tuned 808 bass sounds created using analog synthesizers, digital sine waves, guitar amps and other fancy gear.

https://hexloops.com/xsub-plugin

bx_subfilter

bx_subfilter, a freeware utility for adding clarity and definition to the low-end of your mix.

The plugin is based on the common concept of using a resonant high-pass filter to clean up the extreme low end and boost a target frequency range at the same time. Essentially, the filter tames the content below the cutoff frequency and adds clarity and definition at the cutoff point. It’s a pretty neat technique and certainly a good alternative to using a combination of a non-resonant HP filter and peak filter to do the job.

bx_subfilter was developed with this specific technique in mind and I’m pretty sure that Brainworx designed its curve and behavior to translate well to processing the sub-bass frequency range. Apart from the cutoff knob (which is labeled Tight Punch on the user interface) bx_subfilter also features a fixed band-pass filter control which boosts the low end, a resonance control for adjusting the amount of volume boost at the cutoff point, and input/output gain controls.

https://www.plugin-alliance.com/en/products/bx_subfilter.html

Thump2 sub bass enhancer

Thump2 is basically a sub bass generator/enhancer effect powered by a couple of envelope driven oscillators that respond independently to the audio signal on the input. It is possible to control the attack and sustain of the amplitude and pitch envelopes, as well as to mix the processed and dry signal on the output. The plugin also provides detailed metering of both oscillators, making it easier to understand how the envelope followers respond to the signal on the input.

The user interface looks nice and comes in three different sizes that can be switched between on the fly (the GUI size control is located in the upper-left corner of the interface). It also features a built-in preset browser with twelve factory patches. The factory presets are a good way to get familiar with Thump2’s controls, along with the well-written user manual in PDF format that is included with the download.

As a mix tool, Thump2 works best for beefing up the low end of acoustic drums, sampled drums and similar percussive material where you don’t have direct control over the pitch. When used on complex material such as a full drum mix, it is advisable to load the plugin on a send channel, so that you can isolate the frequency range on the input with an equalizer. Of course, Thump2 can also be used for a range of more creative purposes, such as generating basslines and comb filter style background textures. The provided dry/wet knob is essentially important when using the plugin as an insert effect. Performance-wise, Thump2 is stable and CPU usage is very low. The plugin used around 1% of available CPU resources on a single core Intel processor during our test in MuLab 6 Free.

http://mhsecure.com/metric_halo/products/software/thump.html