GRS 4AS-4 4" Car Replacement Speaker

The GRS 4AS-4 is a compact 4-inch car replacement speaker designed to elevate your vehicle's audio performance with enhanced bass and midrange clarity. Engineered as a bass mid-bass subwoofer, this 4-ohm driver delivers a punchy, articulate sound that transforms your listening experience, whether you are upgrading factory speakers or building a custom car audio system. Its modest 50-watt power handling makes it an ideal choice for tight spaces where a full-sized subwoofer cannot fit, such as under seats, in doors, or in rear panels, providing a noticeable improvement in low-end presence without sacrificing valuable cabin room.

Technically, the 4AS-4 features a 90 dB sensitivity rating, ensuring efficient power usage and robust output even with lower-powered head units. The speaker's impedance is 4 ohms, with a DC resistance of 3.6 ohms, and it offers a frequency response suited for mid-bass reproduction. Key specifications include a total Q factor (Qts) of 1.48, with a mechanical Q (Qms) of 6.09 and an electrical Q (Qes) of 1.95, contributing to its controlled, resonant character. The voice coil inductance is a low 0.3 mH, aiding transient response. With a mounting depth of just 47 mm and a cut-out diameter of 102 mm, this driver fits easily into standard 4-inch openings, secured by four mounting holes. The GRS 4AS-4 is a reliable, space-saving solution for adding depth and definition to your car's audio system.