What is a Cabinet Simulator?

A cabinet simulator, often called a cab sim, is an audio processing plugin that recreates the sound of a guitar or bass speaker cabinet. It simulates how a speaker cabinet, microphone, and recording environment shape the tone of an amplified instrument.

When a guitar or bass amplifier sends sound to a speaker cabinet, the speakers and enclosure significantly affect the tone by filtering frequencies and adding resonance. A cabinet simulator digitally reproduces these acoustic characteristics so that a direct instrument signal can sound like it was played through a real amplifier cabinet and recorded with a microphone.

Cabinet simulators are commonly used alongside amp simulator plugins in digital recording setups. Many cab sims use impulse responses (IRs) captured from real speaker cabinets and microphones to recreate realistic tones. This allows musicians to record guitars or bass directly into a computer while still achieving the sound of a professionally miked amplifier cabinet.