SoundXtreme ST-460 4x6" 3-Way Coaxial Car Speakers

The SoundXtreme ST-460 is a pair of 4x6-inch, 3-way coaxial car speakers for replacing worn or basic factory door, dash, or rear-deck speakers where a 4x6-inch format is required. Their all-in-one coaxial design places the mid-woofer and tweeter in each speaker assembly, helping simplify a conventional speaker upgrade. This pair is intended for vehicles and installations that use 4-ohm speakers.

With a published frequency response of 60 Hz to 20,000 Hz, the ST-460 is designed to cover core music frequencies from mid-bass through high-frequency detail. The polypropylene mid-woofer cone is paired with a 1/2-inch PEI balanced-dome tweeter for a practical full-range speaker layout. An 88 dB sensitivity rating is specified.

The pair is rated for 220 watts peak power handling, with a recommended amplifier power range of 10 to 50 watts RMS per channel. This makes the speakers appropriate for systems that are matched to their published RMS recommendation rather than selected solely by a peak-power number. The 4-ohm nominal impedance is common for automotive speaker wiring and amplification.

SoundXtreme specifies EVC, or Extended Voice Coil, technology for the ST-460. The speaker construction also includes a neodymium magnet motor structure and a stamped-steel frame basket. These details support a compact coaxial design intended for automotive replacement applications.

The ST-460 can be used as part of a straightforward factory-speaker replacement or paired with a compatible aftermarket head unit or amplifier. Because vehicle openings and interior-panel clearance vary, confirm the available mounting space before purchase. A published 3-3/4-inch cutout dimension can help when comparing the speaker with an existing opening.

Key Features

• 4x6-Inch Speaker Size: Fits applications designed around a nominal 4x6-inch speaker format.
• 3-Way Coaxial Design: Combines mid-woofer and high-frequency reproduction in each speaker.
• 220-Watt Peak Rating: Published peak power handling is 220 watts per pair.
• Recommended RMS Range: Designed for 10 to 50 watts RMS per channel.
• PEI Dome Tweeter: Uses a 1/2-inch balanced-dome PEI tweeter.
• 4-Ohm Impedance: Matches the nominal impedance used by many car-audio systems.

Design & Installation

The ST-460 uses polypropylene for its mid-woofer cone, a polyester-foam surround, and a 1/2-inch Polyether Imide (PEI) balanced-dome tweeter. It also has a neodymium magnet motor structure and stamped-steel frame basket. SoundXtreme lists EVC technology as part of the speaker design.

Verify that the vehicle accepts a nominal 4x6-inch speaker and compare the published 3-3/4-inch cutout requirement with the factory opening before installation. Match the speakers to a 4-ohm audio channel and keep amplifier output within the stated 10 to 50 watts RMS-per-channel recommendation. The package includes speaker wire, screws, and a user manual to support installation.