Published 11/11/25
50% discounts available until 5 December 2025
This year’s Black Friday sees Soundtheory offer the biggest discounts to date on their popular Gullfoss intelligent equaliser and Kraftur loudness enhancer plug-ins. Until 5 December 2025, users are able to grab both plug-ins at a 50% discount.
Plug-Ins
Here’s a quick overview of what each plug-in offers, along with a link to their SOS reviews.
Kraftur
- Boost the power of your audio while controlling signal peaks.
- Elevate your mix without compromising dynamics.
- Add punch, depth and presence.
- Avoid artefacts with Kraftur’s cutting-edge soft-clipping technology.
- Includes Kraftur Focus for parallel processing.
- Kraftur SOS Review
Gullfoss
- Three editions optimised for mixing, mastering, and live sound.
- Intelligently treats sound elements in the mix separately.
- Improves clarity, detail, spatiality and definition.
- Reduces all types of masking in your signal.
- Retains dynamics and reduces the need for multiband compression.
- Translates mixes consistently between listening environments.
- Gullfoss SOS Review
“Audio engineers use Soundtheory because they trust our plug-ins. This Black Friday we’re making it easier for users to add both clarity and power — without compromise — at our largest discount ever.” - David Pringle, Managing Director, Soundtheory
Sound Theory’s Black Friday Sale is live now. Discounts will be applied automatically at checkout.
