The IL1115 is low frequency speaker. It supports 70 Hz-2.5k Hz (Bi-amp mode) frequency range, 8 ohms impedance and 97dB SPL sensitivity. Suitable for textured black (Textured White) finish. 16 gauge powder coated perforated steel grilles, backed with acoustically transparent reticulated foam. 1x Neutric NL4 and barrier strip wired in parallel connector.