Gravity SGR404 4" 4-Way Coaxial Car Speakers

The Gravity SGR404 is a pair of compact 4-inch coaxial car speakers designed as a replacement option for smaller factory speaker locations. Its 4-way design combines multiple drivers in each speaker to cover bass, midrange, and high-frequency content from one mounting position. This makes it a practical choice for refreshing worn factory speakers without changing the basic layout of a vehicle audio system.

With a 4-ohm impedance, the SGR404 is intended for use with common car-stereo speaker outputs and compatible aftermarket amplification. The stated 85 dB sensitivity and 70 Hz to 20 kHz frequency response describe a compact speaker focused on broad everyday music playback. As with any 4-inch speaker, installation location and available mounting depth should be checked before purchase.

The woofer uses a silver alpha cellulose cone paired with a moisture-resistant rubber surround. This material combination is intended to support regular in-vehicle use, where speakers may be exposed to heat, vibration, and changing humidity. A neo mylar soft-dome tweeter is included as part of the coaxial driver assembly.

Gravity equips the SGR404 with an anti-resonant stamped-steel basket to provide a stable mounting structure. Spade speaker terminals simplify connection to conventional speaker wiring. The speaker pair has a stated maximum power handling of 200 watts.

The SGR404 can be used in an entry-level system upgrade, a factory-speaker replacement project, or a compact multi-speaker installation. It is supplied as a pair, allowing replacement of two matching speaker positions at once. Speaker wire and mounting screws are included for installation support.

Key Features

• 4-Inch Coaxial Format Fits compact speaker locations where a 4-inch replacement is required.
• 4-Way Driver Design Combines multiple driver elements for broad frequency coverage.
• 4-Ohm Impedance Supports connection with many standard car audio speaker outputs.
• Silver Alpha Cellulose Cone Provides the primary cone material for the woofer section.
• Moisture-Resistant Rubber Surround Helps support durability in an automotive environment.
• Stamped-Steel Basket Provides a rigid speaker frame for mounting stability.

Design & Installation

The SGR404 uses silver alpha cellulose cones, moisture-resistant rubber surrounds, neo mylar soft-dome tweeters, and stamped-steel baskets. Its anti-resonant basket construction is intended to help maintain a stable speaker platform. Spade terminals provide a familiar connection method for vehicle speaker wiring.

Confirm that your vehicle accepts a 4-inch speaker and verify its available mounting depth, cutout, mounting-hole pattern, and grille clearance before installation. Connect each speaker with correct polarity and use the included mounting screws where suitable for the vehicle mounting surface. The included speaker wire may assist with basic wiring, though vehicle-specific adapters or mounting hardware may still be needed.