345: Overloud Th3

In the vast ocean of guitar amp simulation software, it’s easy to get lost in the hype surrounding the "big three" (Neural DSP, IK Multimedia, and Line 6). However, for the past decade, has remained a titan in professional studios, not because of flashy marketing, but because of raw sonic fidelity. Among its treasure trove of 228+ models, one specific preset and amp model has developed a cult following: The Overloud TH3 345 .

Turn this up to 8. The TH3 345 models the voltage drop. When you hit a big open G chord, the volume dips for 200ms then swells back. This is a huge part of the "alive" feeling that other plugins lack.

Disclaimer: This article is based on the features and user experiences of Overloud TH3 as of the latest available information up to 2026. If you'd like to dive deeper, I can also: the specific Brunetti amp models available in TH3. Detail how to configure the IR loader for third-party cabs. Suggest 3 specific, high-gain chains for metal production.

Most amp sims focus on high-gain "chug" or modern metal. Overloud took a different route. The is the secret weapon for session guitarists who play Pop, Country, Blues, Indie Rock, and Funk.

engine is famous for its "feel." Unlike some simulators that sound good but feel stiff, Overloud uses proprietary technology to simulate the responsiveness of real tubes.

The default 4x10 cab has a low resonance at 100Hz. If you are playing drop D or 7-string (unusual for this amp, but fun), move the Low resonance frequency to 80Hz and increase the Q factor to 5. This makes the 345 thump like a closed-back 4x12 while retaining the open top end.