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L12X Solid State Amplifier

Amp Modeling Plugin by Audiority
L12X Solid State Amplifier
L12X Solid State Amplifier by Audiority is a Virtual Effect Audio Plugin and a Software Application for macOS and Windows. It functions as a VST Plugin, an Audio Units Plugin, a VST 3 Plugin, an AAX Plugin and a Standalone Application.
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L12X is an analog simulation inspired by the Marshall Lead 12 solid state amplifier of the late '80s.

The original head was an op-amp based amplifier: instead of using tubes or transistors, the op-amp is able to provide a huge amount of gain with very little or no distortion. However, when the amplified signal reaches the voltage applied to power the op-amp, it gets clipped. Marshall engineers exploited that to provide a great sounding amplifier with very few components.

This little solid state head is able to push cabinets up to 4×12 and can easily sound like a JCM. We modified the original circuit by adding a Contour knob (to get a more scooped tone) and an additional Boost overdrive stage. We also included an integrated Cab Simulator, loaded with a Marshall cabinet IR featuring Celestion V30 cones.


  • 3x Analog Modeled Amplifiers.
  • Solid State Amplifier: Standard.
  • Tube Amplifiers: Clean & Metal.
  • 2 Channels (Clean/Boost).
  • 3 bands tone stack.
  • Contour.
  • Integrated Cabinet Simulator.
  • Resizable interface.
  • No License File required.
  • Standalone.
  • VST2, VST3, AU, AAX & CLAP (64-bit only).
  • Mac and Windows.

*All product names used in this page are trademarks of their respective owners, which are in no way associated or affiliated with Audiority. These trademarks of other manufacturers are used solely to identify the products of those manufacturers whose tones and sounds were studied during Audiority's sound model development. Marshall, Lead 12, ValveState and JCM are registered trademarks of Marshall Amplification Plc.

{See video at top of page}

Latest User Reviews

Average user rating of 5.00 from 1 review
L12X Solid State Amplifier

Reviewed By alienimplant [all]
March 16th, 2021
Version reviewed: 1 on Mac

I'm not a fan most of the free amp sims on the market, but this is a notable exception. I heard demos of the Marshall Lead 12 amp and was really taken with it (video below). When the L12X was released, I didn't realize it was a copy of the Marshall Lead 12 or else hadn't been exposed to the real one yet. I just tested this plugin and it warmed my heart. It's dry as dirt when you load it, so of course add some room verb if you want to experience it in a room and rival the sound in the real amp demo. But the distortion quality of this amp sim, even on the default setting, impressed me immediately.


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