The SPEAKER SIM is a full-screen impedance simulator designed to ensure seamless integration when replacing original speakers with Focal Inside speakers. This innovative tool compensates for any disconnection that may occur during the speaker replacement process, guaranteeing an optimal and error-free installation of your new audio system. It is compatible with the IMPULSE 4.320 four-channel digital amplifier, providing a powerful and high-quality audio experience. Installation is straightforward due to its ISO connectors, which simplify the connection process and enhance usability.