Need a Mesa Boogie Single Rectifier tone without the amp? Looking to record DI guitars and shape your sound entirely in the box?

The Brainworx Audio bx_megasingle gives you exactly that, and it’s available as a free download with any Plugin Alliance account. This plugin is a detailed simulation of the Mesa Boogie Single Rectifier guitar amp, built to let you record a clean DI signal and then craft your final tone—from sparkling clean to high-gain metal—inside your DAW.

What You Get: Amp and Cab Simulation

At its core, this is a faithful model of a Mesa Boogie Single Rectifier. You get two fully independent channels: a Rhythm channel with Clean and Pushed modes, and a Lead channel with Vintage and Modern modes. Each channel has its own gain, master volume, and a dedicated 3-band EQ, giving you separate control for rhythm and lead tones.

The cab section is built from 64 Impulse Responses. These IRs come from three different "MEGA" cabinets, captured with nine different vintage and modern microphones. The entire IR recording chain ran through rare, high-end gear, including a Neve VXS72 console and outboard EQs from Millennia, SPL, and elysia.

Workflow and Extra Controls

A key feature here is the workflow. You can record a dry, DI guitar track and process it later with the full amp simulation, or run external hardware preamps through just the plugin’s power amp and cab section. Beyond the amp and cab, you also have a noise gate, a delay, and a power soak control for attenuating the simulated amp’s output.

Who Should Use the bx_megasingle

This fits a few specific scenarios. It’s useful for producers or musicians recording electric guitars in a studio who want the flexibility to tweak amp settings and microphone choices long after the performance is recorded. If you’re creating guitar parts that need to span from clean rhythms to saturated lead tones, the dual-channel setup here handles that within one plugin. It’s also a practical tool for anyone using hardware preamps, as you can use it to add a simulated power amp and cab.

System Requirements and Limits

The plugin supports VST2, VST3, AU, AAX (Native, DSP, and AudioSuite), and RTAS formats. It runs on macOS 13 and up, and Windows 10 and up (note that Windows 7 is no longer supported). You’ll need a 64-bit CPU, 2 GB of RAM, and a display resolution of at least 1280x960 pixels.

Final Verdict

So, should you grab the bx_megasingle free download? If you record electric guitars and want a no-cost, capable Mesa-style amp sim to process DI tracks inside your DAW, this is a solid option. You get a detailed amp model, a large selection of professionally captured cabinets, and a workflow built for post-recording tweaking. Just make sure your operating system is supported, and know that you’ll need a free Plugin Alliance account to get it. For the price, it’s a straightforward way to add a classic high-gain amp sound to your toolbox.