The Sim UL Eight (Cab Sim) is a speaker cabinet simulator designed for direct recording and headphone playing. It is based on the Run Off Groove Condor Cab Sim and aims to outperform existing designs while still being accessible to DIY builders. The circuit is modeled after the response of a single 10 inch Jensen P10R speaker, but emulates a 4×10 cabinet by adjusting the low frequency response. The Sim UL Eight offers two cabinet versions, with a toggle switch to switch between the stock response and a more “Marshall” sound.

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